TY - GEN. T1 - Computational fluid dynamics analysis of the effect of simulated plaques in the left coronary artery. T2 - A preliminary study. AU - Chaichana, Thanapong. AU - Jewkes, James. AU - Sun, Zhonghua. PY - 2011. Y1 - 2011. N2 - Background: Atherosclerosis is the most common cause of coronary artery disease which is formed by plaque presence inside the artery wall leading to blockage of the blood supply to the heart muscle. The mechanism of atherosclerotic development is dependent on the blood flow variations in the artery wall during cardiac cycles. Characterization of plaque components and investigation of the plaques with subsequent coronary artery stenosis and myocardial dysfunction has been extensively studied in the literature. However, little is known about the effect of plaques on hemodynamic changes to the coronary artery, to the best of our knowledge. Investigation of the position of plaques in the coronary artery and its corresponding regional hemodynamic effects will provide ...

TY - JOUR. T1 - Computational Fluid Dynamics Analysis of the Pediatric Tiny Centrifugal Blood Pump (TinyPump).. AU - K, Kido. AU - K., Kido. AU - H., Hoshi. AU - N., Watanabe. AU - H., Kataoka. AU - K., Ohuchi. AU - J., Asama. AU - T., Shinshi. AU - M., Yoshikawa. AU - S., Takatani. AU - Watanabe, Nobuo. PY - 2006/1/1. Y1 - 2006/1/1. M3 - Article. VL - 30. SP - 392. EP - 399. JO - Artif Organs (2006). JF - Artif Organs (2006). ER - ...

Longitudinal computational fluid dynamics study of aneurysmal dilatation in a chronic DeBakey type III aortic dissection Academic Article ...

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Computational performance of a smoothed particle hydrodynamics simulation for shared-memory parallel computingComputational performance of a smoothed particle hydrodynamics simulation for shared-memory parallel computing ...

TY - JOUR. T1 - 1365. Smoothed particle hydrodynamics modeling of vibro-assisted turning of Ti alloy: influence of vibration parameters. AU - Demiral, Murat. N1 - KAUST Repository Item: Exported on 2020-10-06 Acknowledgements: The research leading to these results received funding from KAUST baseline fund.. PY - 2014/1/1. Y1 - 2014/1/1. N2 - Several modern engineering materials are difficult to process with conventional machining methods. Ultrasonically assisted turning (UAT) is a novel machining technique, where high frequency vibration is superimposed on the cutting tool. Compared to conventional turning (CT), it demonstrated a range of benefits in processing many intractable materials. A decrease in the average cutting force, an improvement in the surface finish and noise reduction were observed. In this study a Lagrangian smoothed particle hydrodynamics (SPH) was introduced for the modeling of the vibro-assisted turning of this advanced alloy. The UAT was implemented into the model by using ...

The internal structure of aerobic granules has a significant impact on the hydrodynamic performance and mass transfer process, and severely affects the efficiency and stability of granules-based reactors for wastewater treatment. In this study, for the first time the granule complex structure was correlated with the hydrodynamic performance and substrates reactions process. First, a series of multiple fluorescence stained confocal laser scanning microscopy images of aerobic granules were obtained. Then, the form and structure of the entire granule was reconstructed. A three-dimensional computational fluid dynamics study was carried out for the hydrodynamic analysis. Two different models were developed on the basis of different fluorescence stained confocal laser scanning microscopy images to elucidate the roles of the granule structure in the hydrodynamic and mass transfer processes of aerobic granules. The fluid flow behavior, such as the velocity profiles, the pathlines and hence the ...

PADTs Computational Fluid Dynamics (CFD) engineers use the worlds leading software tools for CFD simulation. Phoenix Analysis & Design Technology (PADT) :: Tempe Arizona, Littleton Colorado

TY - JOUR. T1 - A Broad Range of Dose Optima Achieve High-level, Long-term Gene Expression After Hydrodynamic Delivery of Sleeping Beauty Transposons Using Hyperactive SB100x Transposase. AU - Podetz-Pedersen, Kelly M.. AU - Olson, Erik R.. AU - Somia, Nikunj V.. AU - Russell, Stephen J.. AU - McIvor, R. Scott. PY - 2016. Y1 - 2016. N2 - The Sleeping Beauty (SB) transposon system has been shown to enable long-term gene expression by integrating new sequences into host cell chromosomes. We found that the recently reported SB100x hyperactive transposase conferred a surprisingly high level of long-term expression after hydrodynamic delivery of luciferase-encoding reporter transposons in the mouse. We conducted dose-ranging studies to determine the effect of varying the amount of SB100x transposase-encoding plasmid (pCMV-SB100x) at a set dose of luciferase transposon and of varying the amount of transposon-encoding DNA at a set dose of pCMV-SB100x in hydrodynamically injected mice. Animals were ...

In this paper, the smoothed particle hydrodynamics (SPH) is applied to simulate the high explosive (HE) explosion which consists of detonation and dispersion process. The combination of meshless and Lagrangian nature inherent in the SPH methodology avoids the disadvantages of traditional numerical methods in treating large deformations, large inhomogeneities and tracing free surfaces in the extremely transient explosion process. Four numerical examples are presented with comparisons from different sources. The presented numerical examples involve in various HE explosion scenarios of arbitrary charge shape and different detonation orientations. The simulation results show that the presented SPH methodology can give good prediction for both the magnitude and form of the detonation wave as well as the pressure transient in the explosion process. Major physics of the HE explosion can be well captured in the simulation. © 2002 Elsevier Science Ltd. All rights reserved ...

This thesis presents the formulation of a Smoothed Particle Hydrodynamics (SPH) model and its application to a range of engineering applications. The motivation for this research lies in the desire to accurately model viscous and turbulent free-surface flows, including those with complete break-up of the free-surface. At present, boundary element modelling is typically chosen to describe free-surface flows where viscous effects are not important. The Volume of Fluid method is able to model most flow phenomena, but the representation of the free-surface is insuffcient for the most complex flows. Current SPH models have shown aptitude for modelling such flows, but there is a noticeable lack of validation carried out in the literature. This thesis includes a thorough investigation into established modelling techniques, extending or developing new techniques where necessary, in order to create a versatile and accurate SPH model for free-surface flows. Where possible, quantitative comparisons with ...

Artificial viscosity is needed in Smooth Particle Hydrodynamics to prevent interparticle penetration, to allow shocks to form and to damp post shock oscillations. Artificial viscosity may, however, lead to problems such as unwanted heating and unphysical. ...

In this study, we investigate plaques located at the left coronary bifurcation. We focus on the effect that the resulting changes in wall shear stress (WSS) and wall pressure stress gradient (WPSG) have on atherosclerotic progress in coronary artery disease. Coronary plaques were simulated and placed at the left main stem and the left anterior descending to produce ,50% narrowing of the coronary lumen. Computational fluid dynamics analysis was carried out, simulating realistic physiological conditions that show the in vivo cardiac haemodynamic. WSS and WPSG in the left coronary artery were calculated and compared in the left coronary models, with and without the presence of plaques during cardiac cycles. Our results showed that WSS decreased while WPSG was increased in coronary side branches due to the presence of plaques. There is a direct correlation between coronary plaques and subsequent WSS and WPSG variations based on the bifurcation plaques simulated in the realistic coronary ...

Modeling the complex interactions between biochemical reactions and hydrodynamics is the key to optimize biofiltration systems performance. In this work, biological kinetics expressions were implemented into Computational Fluid Dynamics (CFD) model as transport equations, including convective and diffusive terms. Previously, activity within the biofilm of a flat plate bioreactor (FPB) was experimentally investigated measuring dissolved oxygen (DO) profiles by means of microsensors and under common operating conditions. Moreover, a mathematical model to describe mass transport and metabolic activity in the FPB was developed and their parameters were fitted from experimental results. Then, a CFD model, combining hydrodynamics and biochemical reactions, was developed and solved to simulate local transient flow and dynamic behaviors of biofilm growth and substrate (glucose) biodregradation in the FPB. The CFD simulation results were evaluated by studying hydrodynamics characterization in the FPB and ...

Computational Fluid Dynamics - Free download as PDF File (.pdf), Text File (.txt) or read online for free. This intense course provides a working understanding of Computational Fluid Dynamics (CFD) and an overview of best practices. It is designed to provide the engineer with basic knowledge to apply CFD, identify and solve real life applications. This course creates an awareness of the potentials and limitations of this technology. The engineer will be exposed to a wide range of applications and the course offers high benefits to those who have little or no exposure to CFD. This course offers engineers involved in CFD an opportunity to sample the wide range of applications that can be solved using CFD methods.

This special issue is dedicated to Steve Attaway, who passed away on February 28, 2019. Steve Attaway worked at Sandia National Laboratories in Albuquerque, NM, for over 30 years making significant contributions in high-performance computing, shock physics, meshfree methods, the geosciences, concrete mechanics, and blast effects on structures. Steves early contributions in meshfree methods included stability analysis of smoothed particle hydrodynamics (SPH) (Swegle, J., Hicks, D., and Attaway, S., 1995, Smoothed Particle Hydrodynamics Stability Analysis, JCP v. 116) and the coupling of SPH with the finite element method in a massively parallel explicit dynamics framework (Attaway, S., Heinstein, M., and Swegle, J., 1994, Coupling of smooth particle hydrodynamics with the finite element method, Nuclear Eng. Design, v. 150). Steve understood the great potential of meshfree methods for modeling structures under extreme loading conditions including blast effects, penetration, and perforation. ...

SUMMARY: Image-based computational fluid dynamics holds a prominent position in the evaluation of intracranial aneurysms, especially as a promising tool to stratify rupture risk. Current computational fluid dynamics findings correlating both high and low wall shear stress with intracranial aneurysm growth and rupture puzzle researchers and clinicians alike. These conflicting findings may stem from inconsistent parameter definitions, small datasets, and intrinsic complexities in intracranial aneurysm growth and rupture. In Part 1 of this 2-part review, we proposed a unifying hypothesis: both high and low wall shear stress drive intracranial aneurysm growth and rupture through mural cell-mediated and inflammatory cell-mediated destructive remodeling pathways, respectively. In the present report, Part 2, we delineate different wall shear stress parameter definitions and survey recent computational fluid dynamics studies, in light of this mechanistic heterogeneity. In the future, we expect that ...

Two-dimensional in-cylinder velocity distributions measured with Particle Image Velocimetry were compared with computed results from Computational Fluid Dynamics codes. A high-swirl, two-valve, four-stroke transparent-combustion-chamber research engine was used. Comparisons were made of mean-flow velocity distributions, swirl-ratio evolution during the intake and compression strokes, and turbulence distributions at top-dead-center compression. This comparison with the measured flows led to more accurate calculations by identifying code improvements including swirl in the residual gas, modeling of the gas exchange during the valve overlap, and improved numerical accuracy ...

Radiation Hydrodynamics (RHD) is essentially normal Hydrodynamics plus the effects of Radiative Transfer (RT). When modeling a physical entity (e.g., a star or cloud), Electromagnetic Radiation (EMR) may or may not significantly affect the result, presenting the question of whether to include the complication of radiative transfer. Much hydrodynamic Code in astrophysics does also include effects of EMR. Note that RHD is also sometimes used for Relativistic Hydrodynamics, i.e., hydrodynamics including the effects of relativity. ...

Membrane fouling is one of the most investigated topics in the field of membrane processes because it is the main weakness that prevents membrane bioreactors (MBRs) from being widely applied. With a view to reducing membrane fouling, all the phenomena involved in the operation are worth understanding through a fine-tuned and deep examination. In the present paper, the study focused on the hydrodynamics in an air-lift MBR with a flat sheet membrane, taking into account the application of a specific method for biofouling mitigation adding free moving particles in addition of bubbles injection. The application of this technique creates a complex three-phase gas-liquid-solid contactor in the MBR in terms of hydrodynamics. Therefore, the main objective of this work was to properly characterize, using a Particle Image Velocimetry (PIV) technique, such a system in order to clarify the potential effect of the addition of free moving solid particle on the hydrodynamics and the performances of the MBR. ...

Hydrodynamics is a subset of fluid dynamics which studies liquids that are at rest or in motion. Fluid mechanics has been around for thousands of years. Archimedes made the first known contributions with his invention of the screw pump. The ancient Romans developed extensive hydraulic machines and devices by using Archimedes screw pump and mine pumping system.. Major developments in hydrodynamics did not start to happen until Sir Isaac Newton formulated the laws of motion. Leonhard Euler applied these laws to fluids. He recognized that dynamic laws for fluids could only be expressed with relatively simple forms. The effects of friction or viscosity had to be neglected. Thus, the results of his analysis were only an estimate.. Today, we have a series of equations to explain the properties of liquids through the conservation laws of mass, energy and momentum. Hydrodynamics is largely used to explain flow through pipes and various obstacles, such as dams. It is also used to predict the flow ...

Computational Fluid Dynamics Working Group Members Companies represented on the NAFEMS Computational Fluid Dynamics Working Group are listed below. NAFEMS Members can access details of the individual Working Group members (you must be logged in to access these details) Abercus ac&e Airbus ANSYS Inc. Boeing Cambridge Consultants Cambridge Flow Solutions Caspus CD-adapco, a Siemens Business ESI Group FLUIDS & C O Ford Motor

TY - CONF. T1 - Towards an in-vitro multi-cellular human airways model for evaluating the effects of Electronic cigarettes. AU - Vasanthi Bathri Narayanan, Pranav. AU - Leslie, Laura J.. AU - Brown, James E.. AU - Marshall, Lindsay J.. PY - 2016. Y1 - 2016. N2 - Despite being poor representations of human airways architecture, innumerable animals, especially rodents, have been used in cigarette smoking studies. The advent of Electronic-cigarettes (ECs) could herald a further escalation, with data from in-vivo experiments already increasingly published. The current study aims to demonstrate the application of a human in-vitro model for evaluation of EC, providing alternatives to the outdated in-vivo models. The human airways model consists of relevant cell types that would be directly encountered during vaping. Human bronchial epithelial cells and pulmonary fibroblasts were co-cultured at air-liquid interface (ALI) under conditions that promote mucociliary differentiation, tight junction ...

Essentials of Fluid Mechanics for Computational Fluid Dynamics (CFD) NAFEMS e-Learning Course Four-Week Online Training Course - one 2-hour session per week Course Overview Fluid mechanics is the study of fluids (gases and liquids) either in motion or at rest and it is divided to two main disciplines: fluid statics (fluids at rest) and fluid dynamics (fluid in motion). There are three major but complimentary branches making up the field of fluid dynam

If you have a question about this talk, please contact Vanessa Blake.. Liquid mixing and blending is an important operation before packaging a many fluid product. The blending or mixing process should be cheap and efficient and at the same time result in high product quality in terms of consistency. In order to achieve this goal experimentally one needs to perform many trials involving changes in the motion and geometric dimensions of the packaging container as well as product ratios of the fluid that is being blended together. Simulation can be used as an efficient tool to reduce the number of such experimental trials and/or optimise the system once a reasonable solution is obtained from the experimental trials.. There are three principle issues that arise while modelling such systems which can lead to difficulties for traditional grid-based CFD methods:. ...

This thesis outlines adaptivity schemes for particle-based methods for the simulation of nearly incompressible fluid flows. As with the remeshing schemes used in mesh and grid-based methods, there is a need to use localized refinement in particle methods to reduce computational costs. Various forms of particle refinement have been proposed for particle-based methods such as Smoothed Particle Hydrodynamics (SPH). However, none of the techniques that exist currently are able to retain the original degree of randomness among particles. Existing methods reinitialize particle positions on a regular grid. Using such a method for region localized refinement can lead to discontinuities at the interfaces between refined and unrefined particle domains. In turn, this can produce inaccurate results or solution divergence. This thesis outlines the development of new localized refinement algorithms that are capable of retaining the initial randomness of the particles, thus eliminating transition zone ...

FAST, ACCURATE CFD Ansys Fluent Helps Make Better, Faster Decisions Through Innovation. Ansys Fluent gives you more time to innovate and optimize. Simcenter fornisce software leader di settore per la fluidodinamica computazionale, che consente di simulare quasi tutti i problemi di progettazione che. Simcenter FLOEFD for Solid Edge supports flow simulation with an embedded CFD simulation tool for easy, fast and accurate fluid flow and heat transfer. Che cosè CFD? Autodesk CFD è un software di simulazione fluidodinamica computazionale utilizzato da ingegneri e analisti per prevedere in modo intelligente. H,SENSE,SMEInst,ESS ENGINEERING SOFTWARE STEYR GMBH(AT). CFD Simulation Software - Ensuring your competitive advantage , NUMECA is a worldwide provider of innovative computational fluid dynamics (CFD) software. Imagine New Horizons Perform software testing and quality assessment of Fluids and Computational Fluid Dynamics (CFD) products to achieve highest. CFD++ is a general purpose ...

Secondly, my lecture notes from the school have now been written up as a review paper on SPH and SPMHD to be published in the Journal of Computational Physics ...

MATERIALS AND METHODS: The hemodynamics in 18 completely occluded aneurysms after treatment with intrasaccular devices was compared against 18 that were incompletely occluded at follow-up. Hemodynamic and geometric parameters were obtained from computational fluid dynamics models constructed from 3D angiographies. Models of the intrasaccular devices were created and interactively deployed within the vascular models using posttreatment angiography images for guidance. Hemodynamic and geometric variables were compared using the Mann-Whitney test and univariate logistic regression analysis. ...

Apart from partial or total joint replacement, no surgical procedure is currently available to treat large and deep cartilage defects associated with advanced diseases such as osteoarthritis. In this work, we developed a perfusion bioreactor system to engineer human cartilage grafts in a size with clinical relevance for unicompartmental resurfacing of human knee joints (50 mm diameter x 3 mm thick). Computational fluid dynamics models were developed to optimize the flow profile when designing the perfusion chamber. Using the developed system, human chondrocytes could be seeded throughout large 50 mm diameter scaffolds with a uniform distribution. Following two weeks culture, tissues grown in the bioreactor were viable and homogeneously cartilaginous, with biomechanical properties approaching those of native cartilage. In contrast, tissues generated by conventional manual production procedures were highly inhomogeneous and contained large necrotic regions. The unprecedented engineering of human ...

The project aims at enhancing the database and improving calcutional modelling of fluid mixing and flow distribution phenomemena in the PWR primary circuit. These phenomena are important for resolution of boron dilution and steam line break accident issues and for assessing the thermal loading of the primary components. Mixing is the most important mitigative mechanism against reactivity insertion due to boron dilution or primary circuit overcooling as well as pressurised thermal shock due to cold emergency cooling water injection. The project includes a well-defined set of mixing experiments in various flow mixing facilities and validating the computational fluid dynamics models for these applications on selected benchmark test based on the experiments. Considering the specifics of VVER type reactors, additional experimental data on slug mixing from a 1:5 scaled VVER-1000 test facility and measurement data from NPPs with VVER-440 and 1000 will be provided ...

Abdulbari, Hayder A. and Kwaire, Asawer A. and Falih, Hussain M. (2009) Modelling of Three Phase System with Non-Newtonian Liquid Using Computational Fluid Dynamics Model. Asian Journal of Industrial Engineering, 1 (1). pp. 12-20. ISSN 1996-3386 ...

Fluid shear stress is an important factor to consider when studying the behavior of endothelial cells in vascular system. The main focus of this study is to relate the spatial and temporal variations in shear stress with the extent of oxidative stress, specifically in arterial branching points in comparison with straight regions in the vessels. For this purpose, a micro shear stress sensor has been designed and fabricated with the backside wire binding feature. The sensors were flush mounted in a 3-D scaled up model of carotid arterial bifurcation to measure the spatial variations in shear stress. These measurements were validated by computational fluid dynamics simulations. Arteries with complex geometries develop a low profile and bidirectional type of shear stress, namely oscillatory however unidirectional and high profile of shear stress, namely pulsatile shear stress develops at straight regions of the vessels. We compared the extent of oxidative stress for the endothelial cells which were ...

Contribute specialized field data analysis and ancillary modeling to provide inputs to hydrodynamic models. Incumbent will use Python scripts to manipulate field data time series and to produce boundary condition fields for hydrodynamic modeling; use ArcGIS to develop post-processing workflows and will develop automation scripts to produce Digital Elevation Models (DEMs) and other project products; and calibrate ancillary bathymetric models, perform error checking and uncertainty analysis. In addition to Python and ArcGIS, bathymetric grid generation software such as Janet and Delft DFlowFM will be used to generate hydrodynamic model inputs. Serve as a research coordinator for tidal hydrodynamic projects conducted by PIs in the Center for Watershed Sciences. By using specialized expertise on tidal hydrodynamics, responsible for ensuring uninterrupted communication between laboratory, data management and modeling. Project functions and project output functions including preparation of reports, ...

0.6-1.9% of US children were born with congenital heart malformations. Clinical and animal studies suggests that abnormal blood flow forces might play a role in causing these malformation, highlighting the importance of understanding the fetal cardiovascular fluid mechanics. We performed Computational Fluid Dynamics simulations of the right ventricles, based on 4D ultrasound scans of three 20 weeks old normal human foetuses, to characterize their flow and energy dynamics. Peak intraventricular pressure gradients were found to be 0.2-0.9 mmHg during systole, and 0.1-0.2 mmHg during diastole. And diastolic wall shear stresses were found to be around 1Pa, which could elevate to 2-4Pa during systole in the outflow tract. Fetal right ventricles have complex flow patterns featuring two interacting diastolic vortex rings, formed during diastolic E-wave and A-wave. These rings persisted through the end of systole and elevated wall shear stresses in their proximity. They were observed to conserve ...

A study, published in Physics of Fluids, reports on the mechanisms of coughing and airborne transmission of viruses.. Dr Philippe Trinh, Lecturer in Applied Mathematics at the University of Bath (with input from Dr Kit Yates and Professor Paul Milewski, both from the Department of Mathematical Sciences), said:. The publication by Dbouk and Drikakis, titled On coughing and airborne droplet transmission to humans, and published today (19 May 2020) performs a computational fluid dynamics simulation of the coughing process, essentially in order to determine the extent or distance in which saliva droplets are transmitted. This is published in a world-leading peer-reviewed journal in fluid dynamics. The authors are clear about the models, parameters, and assumptions they have used-however, we should acknowledge that, like many computational experiments that reach this degree of sophistication, reproducing the results and checking the assumptions requires some effort.. In essence, their conclusions ...

Welcome to the First World Congress on CFD (Computational Fluid Dynamics) of the Nose & Airway.. In recent years there has been an explosion in interest in the field of CFD of the Nose and Airway. The time has come for researchers in Engineering and Healthcare to convene and explore the frontiers of this exciting new field.. In our packed one-day program, we will discuss the Engineering/ technical aspects of CFD simulation, along with practical clinical applications of the results. Our Faculty consists of leading innovators from across the globe, whose knowledge and insights will appeal to experienced researchers, novices entering the field, and interested observers alike.. The conference will be held in conjunction with the Eurpean Rhinological Society Meeting, in the spectacular city of London, against the stunning backdrop of the Thames river, London Bridge, Tower Bridge and The Shard.. We look forward to the pleasure of your company in London on April 22nd, 2018.. ...

Army SBIR 12.2 Topic Descriptions. A12-075 TITLE: Numerical Model of Variable Surface Roughnesses for Parasite Drag Estimation. TECHNOLOGY AREAS: Air Platform. ACQUISITION PROGRAM: PEO Aviation. The technology within this topic is restricted under the International Traffic in Arms Regulation (ITAR), which controls the export and import of defense-related material and services. Offerors must disclose any proposed use of foreign nationals, their country of origin, and what tasks each would accomplish in the statement of work in accordance with section 3.5.b.(7) of the solicitation.. OBJECTIVE: To develop a numerical model for variable surface roughness distributions that can be implemented into computational fluid dynamics simulations for the estimation of the parasite drag of an aircraft.. DESCRIPTION: Surface roughness can be a significant contributor to the drag of an immersed body such as an aircraft [1]. Current Army aircraft can employ a number of materials, paints and protective coatings ...

The book provides a lively and approachable introduction to the main concepts and techniques of relativistic hydrodynamics in a form which will appeal to physicists at advanced undergraduate and postgraduate levels. The book is divided into three parts. The first part deals with the physical aspects of relativistic hydrodynamics, touching on fundamental topics such as kinetic theory, equations of state, mathematical aspects of hyperbolic partial differential equations, linear and nonlinear waves in fluids, reaction fronts, and the treatment of non-ideal fluids. The second part provides an introductory but complete description of those numerical methods currently adopted in the solution of the relativistic-hydrodynamic equations. Starting from traditional finite-difference methods, modern high-resolution shock-capturing methods are discussed with special emphasis on Godunov upwind schemes based on Riemann solvers. High-order schemes are also treated, focusing on essentially non-oscillatory and weighted

TY - JOUR. T1 - Local wall shear stress variations predicted by computational fluid dynamics for hygienic design. AU - Jensen, Bo Boye Busk. AU - Friis, Alan. AU - Benezech, Thierry. AU - Legentilhomme, Patrick. AU - Lelievre, Caroline. PY - 2005. Y1 - 2005. M3 - Journal article. VL - 83. SP - 53. EP - 60. JO - Food and Bioproducts Processing. JF - Food and Bioproducts Processing. SN - 0960-3085. IS - C1. ER - ...

BACKGROUND. Before joining the university, from 2018 to 2020, I was working as a consultant at an independent engineering and coatings consultancy - Safinah Group. During my time at Safinah Group, I was responsible for structuring and collating an in-house database related to drydocking activities and coatings performance benchmarking. Meanwhile supported business activities across the marine and chemical sectors by providing tailored coatings related analysis to a variety of clients.. I completed and obtained PhD degree in 2019 at Newcastle University, with research focused on drag evaluation of copper-based marine antifoulings by using boundary layer and pressure drop measurements including an evaluation of the drag performance of marine biofilms.. From the past years of research and consulting projects, I have gained practical knowledge and skills in experimental fluid dynamics testing, numerical fluid dynamics analysis, biofouling management and protective marine coating solutions.. ...

A rather complete mathematical model for a common-rail injection-system dynamics numerical simulation was developed to support experimentation, layout, and control design, as well as performance optimization. The thermofluid dynamics of the hydraulic-system components, including rail, connecting pipes, and injectors was modeled in conjunction with the solenoid-circuit electromagnetics and the mechanics of mobile elements. One-dimensional flow equations in conservation form were used to simulate wave propagation phenomena throughout the high-pressure connecting pipes, including the feeding pipe of the injector nozzle. In order to simulate the temperature variations due to the fuel compressibility, the energy equation was used in addition to mass conservation and momentum balance equations. Besides, the possible cavitation phenomenon effects on the mass flow rate through the injector bleed orifice and the nozzle holes were taken into account. A simple model of the electromagnetic driving circuit ...

Non-invasive patient-specific cardiovascular fluid dynamics Comprehensive characterization and quantification of blood flow is essential for understanding the function of the cardiovascular system under normal and diseased conditions. This provides important information not only for the diagnosis and treatment planning of different cardiovascular diseases but also for the design of cardiovascular devices. However, the anatomical complexity and multidirectional nature of physiological and pathological hemodynamics makes non-invasive characterization and quantification of blood flow difficult and challenging. Doppler ultrasound, a standard imaging technique, is limited to providing information on large vessels and calculating instantaneous average flow within the cardiac cycle. Magnetic resonance imaging (MRI) is increasingly being used for fluid dynamics analyses of cardiovascular diseases, including pulmonary arterial hypertension, portal hypertension and congenital heart diseases. Although ...

This introduction will give you a high-level overview of Computational Fluid Dynamics (CFD). We will therefore leave out most of the fine-print and concentrate on broad concepts assuming little or no familiarity with fluid mechanics. The introduction is intended for people who do not run simulations themselves, but do require some basic understanding of the topic especially with regard to its application in industrial environments.

Steel catenary risers, (SCR) usually installed between seabed wellhead and floating platform are subjected to vortex shedding. These impose direct forces, hence cyclic stresses, and fatigue damage on the SCR. Riser failure has both economic and environmental consequences; hence the design life is usually greater than the field life, which is significantly reduced by vortex induced vibration (VIV). In this study, SCR and metOcean data from a field in Offshore Nigeria were substituted into linearized hydrodynamic models for simulations. The results showed that the hang off and touchdown regions were most susceptible to fatigue failure. Further analysis using Miner-Palm green models revealed that the fatigue life reduced from a design value of 20-years to 17.04-years, shortened by 2.96-years due to VIV. Furthermore, a maximum wave load of 5.154 kN was observed. The wave loads results corroborated with those obtained from finite element Orca Flex software, yielding a correlation coefficient of 0.975.

With the increased availability of computational resources, the past decade has seen a rise in the use of computational fluid dynamics (CFD) for medical applications. There has been an increase in the application of CFD to attempt to predict the rupture of intracranial aneurysms, however, while many hemodynamic parameters can be obtained from these computations, to date, no consistent methodology for the prediction of the rupture has been identified. One particular challenge to CFD is that many factors contribute to its accuracy; the mesh resolution and spatial/temporal discretization can alone contribute to a variation in accuracy. This failure to identify the importance of these factors and identify a methodology for the prediction of ruptures has limited the acceptance of CFD among physicians for rupture prediction. The International CFD Rupture Challenge 2013 seeks to comment on the sensitivity of these various CFD assumptions to predict the rupture by undertaking a comparison of the rupture ...

Free Online Library: Computational fluid dynamics (CFD) analysis and numerical aerodynamic investigations of automotive disc brake rotor. by Australian Journal of Mechanical Engineering; Engineering and manufacturing Aerodynamics Investigations Control systems Usage Energy (Physics) Force and energy

Article Computational fluid dynamics modeling of contaminant mixing at junctions for an online security management toolkit in water distribution networks. The accurate modeling and simulation of the spread of contaminants within water distribution ne...

See how the Solid Edge Computational Fluid Dynamics (CFD) analysis tool helps design engineers examine trends and eliminate less desirable design options.

Conference Overview. After the immense success of the first conference chaired by Prof. David Elad (Tel Aviv University) in 2012, the 2nd International Conference on CFD in Medicine & Biology will take place in Algarve, Portugal (29.08.-04.09.2015).. With ongoing advances in both software and hardware development, including the huge increase in computers speed and memory, computational fluid dynamics (CFD) are playing an increasing role in simulating complex transport phenomena in medicine and biology. As a result, medical, bioengineering and pharmaceutical research, both academic and industrial have been utilizing the advantages of CFD tools to plan sophisticated and specialized multi-physics models. The benefits of these numerical approaches have allowed to gain deeper insight into many physical and biological phenomena and provided an excellent tool for predicting performance of devices during the design phase. In many applications, the virtual capacity of CFD is replacing experimental work ...