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  • arteries
  • The parameters that were varied during the course of the experimentation include the frequency of the flow pulsation, tubular materials having various structural properties, and blockages of the tube cross sections to simulate the presence of plaque in arteries. (wayne.edu)
  • In-vitro pulsatile flow visualization studies were conducted in an adult-sized pulmonary artery model to observe the effects of valvular pulmonic stenosis on the flow fields of the main, left and right pulmonary arteries. (asme.org)
  • steady-flow
  • The network associated with each main efferent artery of the circle is represented by a single vessel containing an appropriate amount of resistance so that the mean flow through the system is distributed in accordance with the weight of brain irrigated by each vessel as determined from a steady flow model of the same network. (asme.org)
  • tubes
  • The simulations that were performed represent a major advance over prior attempts to simulate pulsating flows in flexible- and rigid-walled tubes. (wayne.edu)
  • stresses
  • For uneven branch flow, it is found that the flow activity inside the aneurysm and the stresses acting on the aneurysmal wall increase with increasing bifurcation angle. (asme.org)
  • assess
  • To assess our ability to detect changes in pulsatile flow, we performed in vitro and preliminary in vivo tests on tissue-simulating phantoms and human teeth. (nih.gov)
  • tube
  • Of special relevance is that the capability to simulate the proper flow regime enabled a more realistic response of the bounding wall of the tube to the imposed pulsations. (wayne.edu)
  • ratio
  • When compared to corresponding constant flow, pulsatile flow was shown to produce insignificant changes to the overall splitting ratio of the bubble despite the order one Womersley numbers, suggesting that bubble splitting through the vasculature could be modeled adequately with a more modest constant flow model. (biomedsearch.com)
  • Laminar
  • In particular, a flow initiated in a relatively large upstream cross section may be laminar based on inlet conditions. (wayne.edu)
  • unsteady
  • The ability to accurately predict the bubble dynamics in unsteady flow within a bifurcating network is demonstrated and suggests the potential for bubbles in microfluidics devices to encode information in both steady and unsteady aspects of their dynamics. (biomedsearch.com)
  • model
  • That advance was embodied in the model that was used to characterize the flow. (wayne.edu)
  • The capability to accommodate all these flow regimes by a single model was first accomplished in this research. (wayne.edu)
  • Computer results are given as time histories of pressure and flow at any model nodal point starting from initial conditions of null flow and constant pressure throughout the model. (asme.org)
  • Variations in these pressure and flow distributions caused by the introduction of pathologic situations into the model illustrate the efficacy of the simulation and of the circle in equalizing and redistributing flows in abnormal situations. (asme.org)
  • branch
  • the highest values occurred at the convex corner on the outer wall of the branch and in the neighborhood of the flow divider tip, and the lowest shears were experienced by the outer wall of the daughter vessel a short distance distal to the corner. (ahajournals.org)
  • For evenly distributed branch flow, the intra-aneurysmal flow is sluggish and therefore prone to thrombosis for all studied bifurcation angles. (asme.org)
  • major
  • This graph shows the total number of publications written about "Pulsatile Flow" by people in this website by year, and whether "Pulsatile Flow" was a major or minor topic of these publications. (rush.edu)
  • extent
  • Of equal importance is the extent of the response of the wall to the nature of the pulsating flow which was detected, located and characterized using a non-invasive acoustic emission equipment. (wayne.edu)
  • presence
  • With our approach, we observed in vitro the presence of pulsatile flow at different simulated heart rates. (nih.gov)
  • Data from in vitro and in -vivo tests strongly suggest that this probe can detect the presence of pulsatile flow. (nih.gov)
  • In the presence of obstruction of CSF flow, as shown in figure (c-d), there is absence of flow-related signal intensity. (springer.com)
  • Another unique contribution of this research is the determination of the presence of flow-induced acoustic emissions. (wayne.edu)
  • studies
  • In most of prior studies, a particular flow regime was selected and used throughout the entire solution domain. (wayne.edu)
  • heart
  • We imaged flow of intralipid in a glass microchannel at simulated heart rates ranging from 40 beats/minute (bpm) to 120 bpm (0.67-2.00 Hz). (nih.gov)
  • main
  • The main outcome of the experimentation was a connection between the amplitude and frequency of the pulsations and the volumetric flow rate of the flowing fluid. (wayne.edu)