 | Viscosity |
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 | The Effect of Viscosity On The Stability Of A Radially Accelerated Cylindrical Shell Of Plasma
Author : Bhat, P.K. ;Kaushik, B.K.;Srivastava, S.P.
Source : Defence Science Journal ; Vol:23(2) ; 1973 ; pp 45-54
Subject : 532.542 Fluid Dynamics
Keywords : Plasma;Viscosity
Abstract : The effect of viscosity on the axisymmetric stability of a radially accelerated cylindrical shell of plasma in the presence of a soleniodal magnetic field has been investigated. It is found that when the Reynolds number as well as the dimensionless wave number is small, the system is unstable and the growth rate of instability depends upon its acceleration. This is in agreement with the experimental observations of Dickinson. |
| | On the constitutive relation for a class of reinerrivlin fluids
Author : Kapur, J. N.;Gupta, R. C.
Source : Defence Science Journal ; Vol:16(1) ; 1966 ; pp 21-24
Subject : 532 Fluid Mechanics
Keywords : Fluid mechanics;Reiner-Rivlin fluids;Viscosity;Stress;Strain
Abstract : For a class of Reiner-Rivlin fluids characterised by the relation T =µ0I+µ1 D+µ2D2 ……µnDn where T, D and I are the stress, rats of strain and unit matrices respectively, restrictions on the phenomenological coefficients µ0, µ1, µ2, µn ……. where they (i) are constants and (ii) accept power-series expansions, have been obtained so that the dissipation function is non-negative for all possible rates of deformation. |
| | A Note on waves Generated at a Liquid Solid Interface II (Viscous Effects)
Author : Harinath, K.S.;Muthuswamy, V.P.
Source : Defence Science Journal ; Vol:28(3) ; 1978 ; pp 137-144
Subject : 532.542 Fluid Dynamics
Keywords : Liquid Layer;Thermoelasticity;Viscosity
Abstract : This paper, being a continuation of a previous note of the same title, deals with the effect of viscosity on the interface waves propagated in a liquid layer overlying a generalized thermoelastic solid halfspace. This note extends the results of Harinath and has applications to defence science and geophysical problems. The problem considered has more relevance to the physical situations encountered in reality than its elastic counterpart. In other words, generalized thermoelasticity fits into the realistic situation better than classical elasticity or coupled thermoelasticity. The details pertaining to the non viscous effects of liquid layer overlying a perfectly elastic halfspace may be found in the treatise by Ewing, Jardetzky and Press those of coupled thermoelasticity in the treatise by Nowacki and details of wave propagation problems in generalized thermoelasticity in the concise paper by Harinath. The stress strain relations used for a viscous fluid may be found in Pipkin, with slight modifications, without any loss in generality. Most of the results obtained here are new. |
| | Effects of Velocity-slip and Viscosity Variation for Lubrication of Roller Bearings
Author : Raghavendra Rao, R.;Prasad, K. R.
Source : Defence Science Journal ; Vol:53(4) ; 2003 ; pp 431-442
Subject : 531 Mechanics;53 Applied Physics
Keywords : Reynolds equation;Velocity-slip;Viscosity;Roller bearings;Cavitation;Load capacity ;Coefficient of friction
Abstract : A generalised form of Reynolds equation for two symmetrical surfaces is derived considering velocity-slip at the bearing surfaces. This equation is applied to study the effects of velocity-slip for the lubrication of roller bearings under lightly loaded conditions. Expressions for the point of cavitation, load capacities, and coefficient of friction obtained are also studied theoretically for various parameters. |
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