The Stability of Blood Cell Suspensions to Small Disturbances in Circular Couette Flow: Experimental Results for the Taylor Problem

1979 ◽  
Vol 101 (4) ◽  
pp. 289-292 ◽  
Author(s):  
S. Deutsch ◽  
W. M. Phillips
Keyword(s):  
Blood Cell ◽  
Blood Plasma ◽  
Couette Flow ◽  
Cell Suspensions ◽  
Experimental Results ◽  
Red Cell ◽  
Red Cell Deformability ◽  
Circular Couette Flow ◽  
The Stability ◽  
Small Disturbances

Experimental results for the stability of human blood, red cell suspensions and blood plasma to small disturbances in circular Couette flow are presented. The viscoelastic nature of whole blood and blood cell suspensions is confirmed. Blood plasma is found to be Newtonian. Elasticity is shown to have a sizably stabilizing effect on normal Hematocrit blood behavior. Two mechanisms by which elasticity may arise in blood are identified; namely red cell deformability and red cell aggregation.

Influence of red cell concentration on filtration of blood cell suspensions

Biorheology ◽  
1983 ◽  
Vol 20 (1) ◽  
pp. 29-40 ◽  
Author(s):  
E.A. Schmalzer ◽  
R. Skalak ◽  
S. Usami ◽  
M. Vayo ◽  
S. Chien
Keyword(s):  
Blood Cell ◽  
Cell Concentration ◽  
Cell Suspensions ◽  
Red Cell

Revisiting the stability of circular Couette flow of shear-thinning fluids

2012 ◽  
Vol 183-184 ◽  
pp. 37-51 ◽  
Author(s):  
Brahim Alibenyahia ◽  
Cécile Lemaitre ◽  
Chérif Nouar ◽  
Noureddine Ait-Messaoudene
Keyword(s):  
Couette Flow ◽  
Shear Thinning ◽  
Circular Couette Flow ◽  
Shear Thinning Fluids ◽  
The Stability

Energy stability of modulated circular Couette flow

1977 ◽  
Vol 79 (3) ◽  
pp. 535-552 ◽  
Author(s):  
Peter J. Riley ◽  
Robert L. Laurence
Keyword(s):  
Couette Flow ◽  
Nonlinear Stability ◽  
Energy Analysis ◽  
Outer Cylinder ◽  
Reynolds Numbers ◽  
Initial Energy ◽  
Critical Parameters ◽  
Narrow Gap ◽  
Circular Couette Flow ◽  
The Stability

The stability of circular Couette flow when the outer cylinder is at rest and the inner is modulated both with and without a mean shear is examined in the narrow-gap limit. Disturbances are assumed to be axisymmetric. Two criteria are used to determine conditions for stability; the first requires that the motion be strongly stable, the second only that disturbances of arbitrary initial energy decay from cycle to cycle. The behaviour of critical parameters as a function of frequency is similar for the linear and the energy analysis. The range of Reynolds numbers bounded above by certain instability and below by conditional nonlinear stability is enlarged by modulation.

On the behaviour of small disturbances in plane Couette flow with a temperature gradient

1965 ◽  
Vol 286 (1404) ◽  
pp. 117-128 ◽  
Keyword(s):  
Rayleigh Number ◽  
Couette Flow ◽  
Reynolds Numbers ◽  
Neutral Stability ◽  
Two Dimensional ◽  
Plane Couette Flow ◽  
Infinitesimal Disturbance ◽  
Prandtl Numbers ◽  
The Stability ◽  
Small Disturbances

The stability of plane Couette flow with a heated lower plate is considered with respect to a two-dimensional infinitesimal disturbance. The eigenvalues are found with the aid of a digital computer as the latent roots of a matrix. Neutral stability curves for various Prandtl numbers at Reynolds numbers up to 150 are obtained by a second method. It is found that the principle of the exchange of stabilities does not hold for this problem. With the aid of Squire’s transformation the conclusion is drawn that all fluids will become unstable at the same value of the Rayleigh number irrespective of whether shear is present or not.

On the behaviour of small disturbances in plane Couette flow. Part 3. The phenomenon of mode-pairing

1974 ◽  
Vol 65 (1) ◽  
pp. 29-32 ◽  
Author(s):  
A. P. Gallagher
Keyword(s):  
Couette Flow ◽  
Plane Couette Flow ◽  
Form Complex ◽  
Flow Part ◽  
The Stability ◽  
Small Disturbances

In two earlier papers (Gallagher & Mercer 1962, 1964) the results for the first four eigenvalues of the problem of the stability of plane Couette flow were given. The first twelve eigenvalues have been calculated by the same method and the results show that the manner in which the eigenvalues join to form complex pairs depends on α, the wavenumber of the disturbance. They also would appear to indicate that mode-crossing always occurs.

Enhancement of Heat Transfer in Red Cell Suspensions In Vitro Experiments

1989 ◽  
Vol 111 (2) ◽  
pp. 152-156 ◽  
Author(s):  
R. T. Carr ◽  
N. R. Tiruvaloor
Keyword(s):  
Heat Transfer ◽  
Blood Cell ◽  
Cell Suspensions ◽  
Red Cells ◽  
Red Cell ◽  
In Vitro Experiments ◽  
Enhancement Of Heat Transfer ◽  
Heating And Cooling ◽  
Sheared Suspensions

New data on laminar heat convection with red cell suspensions have been gathered for both heating and cooling. When compared to data for the suspending medium alone, it is apparent that the red cells enhance laminar heat transfer when Pe > 4. This is probably due to particle movements. These new data disagree with earlier studies which indicated no enhancement of heat transfer for blood cell suspensions. The data do agree with previous correlations for enhanced thermal transport in sheared suspensions.

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