• kinematic viscosity
  • The unit of kinematic viscosity in the centimetre-gram-second (CGS) system, called the stokes in Britain and the stoke in the U.S., is named for the British physicist Sir George Gabriel Stokes . (britannica.com)
  • Under ideal conditions, this rate of flow would be proportional to the kinematic viscosity (expressed in stokes and centistokes) that is dependent upon the specific gravity of the draining liquid. (wikipedia.org)
  • actual viscosity
  • From diagram 4 , assuming that the operating temperature of the bearing is 70ºC, it is found that a lubricant to an ISO VG 32 viscosity class, with an actual viscosity ν of at least 32 mm 2 /s at the reference temperature of 40ºC will be required. (skf.com)
  • Viscometer measures the actual viscosity of the fuel, this value is compared with the set point in the controller and the command is sent to the heater to adjust the temperature of the fuel. (wikipedia.org)
  • rotational
  • The rated viscosity ν 1 , required for adequate lubrication, can be determined from diagram 1 , using the bearing mean diameter d m = (D + d)/2, mm, and the rotational speed of the bearing n, r/min. (skf.com)
  • If there is a lack of equilibrium between these degrees of freedom, then the rate of equilibration will be determined by the rotational viscosity coefficient. (wikipedia.org)
  • equation
  • This equation is called the defining equation for shear viscosity. (wikipedia.org)
  • The functional relationship between viscosity and other physical properties is described by a mathematical viscosity model called a constitutive equation which is usually more complex than the defining equation for viscosity. (wikipedia.org)
  • In mathematics, the viscosity solution concept was introduced in the early 1980s by Pierre-Louis Lions and Michael G. Crandall as a generalization of the classical concept of what is meant by a 'solution' to a partial differential equation (PDE). (wikipedia.org)
  • It has been found that the viscosity solution is the natural solution concept to use in many applications of PDE's, including for example first order equations arising in optimal control (the Hamilton-Jacobi equation), differential games (the Isaacs equation) or front evolution problems, as well as second-order equations such as the ones arising in stochastic optimal control or stochastic differential games. (wikipedia.org)
  • If a scalar equation is degenerate elliptic (defined below), one can define a type of weak solution called viscosity solution. (wikipedia.org)
  • Laminar
  • High viscosity mixers are mixers designed for mixing materials with laminar mixing processes because the ingredients have such high viscosities that a turbulent mixing phase cannot be obtained at all or cannot be obtained without a high amount of heat. (wikipedia.org)
  • Some products that may require laminar mixing in a high viscosity mixer include putties, chewing gum, and soaps. (wikipedia.org)
  • lubricant
  • If an adequate lubricant film is to be formed, the lubricant must have a given minimum viscosity when the application has reached its normal operating temperature. (skf.com)
  • In order to form an adequate lubricant film between the rolling contact surfaces, the lubricant must retain a minimum viscosity when the lubricant is at operating temperature. (skf.com)
  • temperature
  • How do oil companies formulate multi-viscosity lubricants for all-temperature protection? (kbb.com)
  • When the operating temperature is known from experience or can otherwise be determined, the corresponding viscosity at the internationally standardized reference temperature of 40°C can be obtained from diagram 2 . (skf.com)
  • Table lists the viscosity grades according to ISO 3448:1992 showing the range of viscosity for each class at 40°C. Certain bearing types, e.g. spherical roller bearings, tapered roller bearings, and spherical roller thrust bearings, normally have a higher operating temperature than other bearing types, e.g. deep groove ball bearings and cylindrical roller bearings, under comparable operating conditions. (skf.com)
  • Since d m = 0,5 (d + D), d m = 380 mm, from diagram 3 , the minimum rated viscosity ν 1 required to give adequate lubrication at the operating temperature is approximately 11 mm 2 /s. (skf.com)
  • Viscosity index (VI) is an arbitrary measure for the change of viscosity with variations in temperature. (wikipedia.org)
  • The lower the VI, the greater the change of viscosity of the oil with temperature and vice versa. (wikipedia.org)
  • It is used to characterize viscosity changes with relation to temperature in lubricating oil. (wikipedia.org)
  • The best oils with the highest VI will remain stable and not vary much in viscosity over the temperature range. (wikipedia.org)
  • Fuel viscosity control is a technique to control viscosity and temperature of fuel oil (FO) for efficient combustion in diesel engines of motor vessels and generators of oil-fired power plants. (wikipedia.org)
  • It is important when using a Ford Cup and when retesting liquids that the temperature of the cup and the liquid is maintained, as ambient temperature makes a significant difference to viscosity and thus flow rate. (wikipedia.org)
  • Unless otherwise stated, all viscosities are measured at room temperature and pressure. (wikipedia.org)
  • measure
  • The reciprocal of the viscosity is called the fluidity , a measure of the ease of flow. (britannica.com)
  • This new micro rheometer or 'treacleometer' based upon micro and nanotechnology will measure the viscosity or 'feel' of a liquid based product, such as hair shampoo or sun block. (theengineer.co.uk)
  • high
  • That is why today's 'multi-viscosity' oils are engineered to protect an engine throughout its full range of operating temperatures, from extreme winter cold starts to long, hot, high-speed runs on the hottest summer days. (kbb.com)
  • The application of the high-viscosity ink is carried out as in any intaglio process: by forcing it into the recesses of the plate and then wiping off the plate's surface with a tarlatan. (wikipedia.org)
  • Inking the acrylic or plexiglass plate with one ink with a very high viscosity, and following that, rolling a very loose ink over it, produces two tones on a single plate. (wikipedia.org)
  • If it is easier to add a hack than it is to add code that fits into the program's design, then the system has high viscosity. (wikipedia.org)
  • The process can be used for high viscosity liquid to liquid mixing or for paste mixing combining liquid and solid ingredients. (wikipedia.org)
  • oils
  • We add viscosity modifiers (VMs) to conventional oils to artificially provide that range,' Hsu explains. (kbb.com)
  • With that trend toward thinner and thinner oils, you still have to be able to keep the engine protected, and only a synthetic oil is capable of optimizing these low viscosities. (kbb.com)
  • The Viscosity Index of synthetic oils ranges from 80 to over 400. (wikipedia.org)