Results 261 to 270 of about 183,428 (314)
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High Shear Rate Hemofiltration: Influence of Fiber Dimensions and Shear Rates
Artificial Organs, 1989Abstract: The variation of ultrafiltration flow rate (QF) at high transmembrane pressure with inlet wall shear rate (γW) was found to be proportional to γW, with n ranging from 0.45 to 0.55, when γW increases up to 4,500 s‐1. To test whether long filters operated at high shear rates were more efficient than shorter ones for the same inlet blood flow ...
B B, Gupta, L H, Ding, M Y, Jaffrin
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Physical Review Letters, 2008
There are contradictory published data on the behavior of fluid slip at high shear rates. Using three methodologies (molecular dynamics simulations, an analytical theory of slip, and a Navier-Stokes-based calculation) covering a range of fluids (bead-spring liquids, polymer solutions, and ideal gas flows) we show that as shear rate increases, the ...
Ashlie, Martini +3 more
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There are contradictory published data on the behavior of fluid slip at high shear rates. Using three methodologies (molecular dynamics simulations, an analytical theory of slip, and a Navier-Stokes-based calculation) covering a range of fluids (bead-spring liquids, polymer solutions, and ideal gas flows) we show that as shear rate increases, the ...
Ashlie, Martini +3 more
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Rheologica Acta, 2008
We investigate the use of two distinct and complementary approaches in measuring the viscometric properties of low viscosity complex fluids at high shear rates up to 80,000 s−1. Firstly, we adapt commercial controlled-stress and controlled-rate rheometers to access elevated shear rates by using parallel-plate fixtures with very small gap settings (down
Christopher J. Pipe +2 more
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We investigate the use of two distinct and complementary approaches in measuring the viscometric properties of low viscosity complex fluids at high shear rates up to 80,000 s−1. Firstly, we adapt commercial controlled-stress and controlled-rate rheometers to access elevated shear rates by using parallel-plate fixtures with very small gap settings (down
Christopher J. Pipe +2 more
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Hydrodynamic fluctuations at large shear rate
Physical Review A, 1985The nonlinear Navier-Stokes-Langevin equations are used to describe fluctuations in a compressible fluid with uniform shear flow. The hydrodynamic modes for small deviations from the macroscopic nonequilibrium state are calculated, including linear mode coupling of the fluctuating variables with the macroscopic velocity field.
Lutsko, James, Dufty, James
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Thrombus Formation at High Shear Rates
Annual Review of Biomedical Engineering, 2017The final common pathway in myocardial infarction and ischemic stroke is occlusion of blood flow from a thrombus forming under high shear rates in arteries. A high-shear thrombus forms rapidly and is distinct from the slow formation of coagulation that occurs in stagnant blood.
Lauren D C, Casa, David N, Ku
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Blood sedimentation at controlled shear rates
The Chemical Engineering Journal, 1977The sedimentation of dextranated human erythrocytes is found to be more reproducible in the presence of controlled shear than in conventional Westergren tubes. The induction period is also greatly reduced in length. It is suggested that the method could be used for measuring clinical ESR’s with greater precision and speed than is possible using current
N M, Vincent, D R, Oliver
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Rate of Shear Effects on Vane Shear Strength
Journal of Geotechnical Engineering, 1985A series of laboratory vane shear tests was performed on sedimented samples of kaolinite and slaked Pierre shale to determine the effects of shear rate and vane dimensions on measured strength. Results of the tests were expressed in terms of shear strength on a vertical plane and were plotted versus average shear rate.
Mohsen Sharifounnasab, C. Robert Ullrich
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Artificial Organs, 1989
Abstract: The hydrodynamic effect of periodically fluctuating shear rate on erythrocyte destruction was quantitatively studied in vitro in comparison with constant shear rates. Uniform shear rates (< 1,000 s‐1; constant or sinu‐soidally fluctuating with time) were applied to heparin‐ized canine blood contained in the concavo‐convex type of Couette ...
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Abstract: The hydrodynamic effect of periodically fluctuating shear rate on erythrocyte destruction was quantitatively studied in vitro in comparison with constant shear rates. Uniform shear rates (< 1,000 s‐1; constant or sinu‐soidally fluctuating with time) were applied to heparin‐ized canine blood contained in the concavo‐convex type of Couette ...
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High-shear-rate optical rheometer
Review of Scientific Instruments, 2004We have developed a parallel-plate rheometer in a magnetic-disk drive configuration constructed of optically transparent materials and operating with a very small gap for measurements at very high shear rates. The friction force at the disk–slider interface has been measured as a function of sliding speed while the film thickness was monitored in situ ...
K. S. Mriziq +4 more
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Rubber Plastimeter with Uniform Rate of Shear - Shearing-Cone Plastimeter
Journal of Scientific Instruments, 1945Abstract A new shearing-cone plastometer, suitable for investigating the plastic-flow relations of highly viscous materials over a wide range of stress, is described. A mushroom-shaped rotor, having upper and lower surfaces of conical type, is rotated in the plastic material contained in a cylindrical mould.
G. H. Piper, J. R. Scott
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