Results 291 to 300 of about 359,267 (337)

Validity of Taylor’s Dissipation-Viscosity Independence Postulate in Variable-Viscosity Turbulent Fluid Mixtures

Physical Review Letters, 2008
G. I. Taylor's postulate [Proc. R. Soc. A 151, 421 (1935)] that dissipation is independent of viscosity at high Reynolds numbers is the foundation of many single-fluid turbulence theories and closure models. The validity of this key postulate in an important class of flows, turbulent mixtures, is not yet clearly established.
Kurnchul, Lee, Sharath S, Girimaji, Johannes, Kerimo   +2 more
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Conical flows of fluid with variable viscosity

Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1988
It is proved that a model of a turbulent swirling vortex near a plane, which was studied by Wu ( Proc. R. Soc. Lond . A 403, 235–268 (1986)), is inconsistent. There is no regular solution for a swirling downward flow satisfying the adherence condition at the surface.
Goldshtik, M. A., Shtern, V. N.
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Eddy Viscosity for Variable Density Coflowing Streams

Journal of Aircraft, 1974
Abstract : The classical Prandtl eddy viscosity model, which was formulated for an incompressible jet into still air, is modified to account for a density difference between the jet and a non-zero velocity coflowing stream. The constant in the potential core of the Prandtl model is freed and empirically determined as a function of the local mass flux ...
Robert E. Boyle, Hermann Viets
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Microstructure of Diverting Acids of Variable Viscosity

2021
There are two ways of increasing viscosity, dilute and concentrated, in the diverting acid system, which is suitable for carbonate rock stimulation. However, the micro understanding of its viscosity increasing law is not clear.
Chuan Sun, Chen-zhi Huang, Chuan Wang, Shuang Liu, Qi Li   +4 more
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Effects of variable viscosity on slider bearing

Acta Mechanica Sinica, 1986
By considering the now in a slider bearing to be a nearly viscometric flow we have examined the effects of variation in viscosity, and normal stress differences on the total resistance and total normal force. We have found that under certain conditions the normal stress differences may be neglected compared with the variation in viscosity.
C. F. Chan Man Fong, Cai Fushi
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Variable viscosity in peristalsis of Sisko fluid

Applied Mathematics and Mechanics, 2018
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Tanveer, A., Hayat, T., Alsaedi, A.
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Convection in a mantle with variable viscosity

Journal of Geophysical Research, 1970
Studies are made on typical features of convection current in a thin viscous layer on a deep layer of high viscosity. The streamlines in this case are concentrated but not closed in the upper thin layer. The horizontal velocity is one sign in the upper layer and the other sign in the lower. The horizontal mass flux in the upper layer is balanced by the
H. Takeuchi, S. Sakata
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Bäcklund transformation of a “variable viscosity” burgers equation

International Journal of Engineering Science, 1988
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Lubricant Fluid Films With Directional Variable Viscosity

Journal of Lubrication Technology, 1974
A new rheological model for lubricants containing additives having long molecules is presented. The viscosity of the fluid is assumed to depend on the angle between the viscous forces and the velocity vector at each point in the lubricating film. The characteristics and consequences of this model are discussed qualitatively and quantitatively.
N. Tipei, S. M. Rohde
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Variability of wheat and other cereal water extract viscosity. 1 - Improvements in measuring viscosity

Journal of the Science of Food and Agriculture, 1999
Experiments were carried out to improve the measurement of the viscosity of cereal water extracts. Water extract viscosity (WEV) appeared to be related to the particle size of the meals obtained after grinding. With ball-mills, viscosity was higher than with rotating-mills and also depended on grinding conditions such as quantity of grains, volume of ...
Grosjean, F., Saulnier, L., Maupetit, P., Beaux, M.F., Flatres, M.C., Magnin, Morgane, Le Pavec, P., Victoire, Coralie   +7 more
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