EXPERIMENTAL DETERMINATION OF CRITICAL TAYLOR NUMBER FOR COUETTE FLOW BETWEEN ROTATING CYLINDERS WITH POROUS LINING

1988 ◽  
pp. 168-173
Author(s):  
M.N. Channabasappa ◽  
G. Ranganna ◽  
B. Rajappa
Keyword(s):  
Experimental Determination ◽  
Couette Flow ◽  
Taylor Number ◽  
Rotating Cylinders ◽  
Porous Lining

The stability of elastico-viscous flow between rotating cylinders Part 3. Overstability in viscous and Maxwell fluids

1966 ◽  
Vol 24 (2) ◽  
pp. 321-334 ◽  
Author(s):  
D. W. Beard ◽  
M. H. Davies ◽  
K. Walters
Keyword(s):  
Viscous Flow ◽  
Couette Flow ◽  
Taylor Number ◽  
Linear Perturbation ◽  
Rotating Cylinders ◽  
Initial Value ◽  
Viscous Liquids ◽  
Maxwell Fluids ◽  
Newtonian Liquids ◽  
The Stability

Consideration is given to the possibility of overstability in the Couette flow of viscous and elastico-viscous liquids. The relevant linear perturbation equations are solved numerically using an initial-value technique. It is shown that over-stability is not possible in the case of Newtonian liquids for the cases considered. In contrast, overstability is to be expected in the case of moderately-elastic Maxwell liquids. The Taylor number associated with the overstable mode decreases steadily as the amount of elasticity in the liquid increases, and it is concluded that highly elastic Maxwell liquids can be very unstable indeed.

Flow Stability in Rotating Cylinders With a Porous Lining

2009 ◽  
Author(s):  
M. Subotic ◽  
F. C. Lai
Keyword(s):  
Flow Instability ◽  
Three Dimensional ◽  
Flow Stability ◽  
Taylor Number ◽  
Rotating Cylinders ◽  
Wide Range ◽  
Fluid Layers ◽  
Stabilizing Effect ◽  
Porous Sleeve ◽  
Porous Lining

The effects of porous sleeve properties on the flow stability in rotating cylinders are numerically investigated in this study. To this end, three-dimensional momentum equations for the porous and fluid layers are formulated separately in terms of velocity and vorticity. These equations are then numerically solved over a wide range of parameters (10−2 ≤ Da ≤ 10−5, 2000 ≤ Ta ≤ 5000) to determine the critical Taylor number for the onset of flow instability for various porous sleeve properties. The results obtained show that the presence of a porous sleeve in general has a stabilizing effect on the flow in the annulus.

Experimental determination of a state equation for dissipative granular gases

1999 ◽  
Vol 96 (6) ◽  
pp. 1111-1116 ◽  
Author(s):  
E. Falcon ◽  
S. Fauve ◽  
C. Laroche
Keyword(s):  
Experimental Determination ◽  
State Equation ◽  
Granular Gases

AN EXPERIMENTAL DETERMINATION OF ISOLATED BUBBLE ACOUSTICS IN A NUCLEATE BOILING SYSTEM

1974 ◽  
Author(s):  
G. E. Robinson ◽  
Frank W. Schmidt ◽  
H. R. Block ◽  
G. Green
Keyword(s):  
Experimental Determination ◽  
Nucleate Boiling
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