Showing papers by "R. Usha published in 2002"
TL;DR: In this paper, the laminar squeeze flow of an incompressible viscous fluid between a flat circular disk and a curved circular disk is analyzed by taking into account the effects of fluid inertia and curvature, using energy integral method.
14 citations
TL;DR: In this article, the laminar squeeze flow of a viscous incompressible fluid between a flat circular disk and an axisymmetric curved disk of arbitrary shape is investigated theoretically using modified lubrication theory.
Abstract: The laminar squeeze flow of a viscous incompressible fluid between a flat circular disk and an axisymmetric curved disk of arbitrary shape is investigated theoretically using modified lubrication theory. The characteristics of squeeze film are investigated through inertia and curvature effects on the normal force exerted on the upper curved moving disk described by an exponential function for the sinusoidal squeeze motion. The constant force squeezing state is also examined. It has been observed that the load carrying capacity of the curved squeeze film is strongly influenced by the curvature and inertia effects.
5 citations
TL;DR: The effect of air shear on the development of a thin conducting fluid film on a rough rotating disk has been analyzed in this paper, and the numerical solution of the governing equations of motion using the initial and boundary conditions has been obtained by a finite difference method.
Abstract: The effect of air shear on the development of a thin conducting fluid film on a rough rotating disk has been analysed A uniform magnetic field acts parallel to the axis of the rough rotating disk The numerical solution of the governing equations of motion using the initial and boundary conditions have been obtained by a finite difference method The effect of air shear on the temporal evolution of the free surface of the fluid and on the retention of the liquid lubricant has been analysed
2 citations
01 Jan 2002
TL;DR: In this paper, the phase change effects at the interface of thin viscoelastic liquid film flowing down a vertical wall including the phase-change effects at interface has been investigated and a normal mode approach and the method of multiple scales are employed to carry out the linear stability solution and the nonlinear stability solution for the film flow system.
Abstract: Wealky nonlinear stability analysis of thin viscoelastic liquid film flowing down a vertical wall including the phase change effects at the interface has been investigated. A normal mode approach and the method of multiple scales are employed to carry out the linear stability solution and the nonlinear stability solution for the film flow system. The results show that both the supercritical stability and subcritical instability are possible for condensate, evaporating and isothermal viscoelastic film flow system. The stability characteristics of the viscoelastic film flow are strongly influenced by the phase change parameter. The condensate (Evaporating) viscoelastic film is more stable (unstable) than the isothermal viscoelastic film and the effect of viscoelasticity is to destabilize the film flowing down a vertical wall.Copyright © 2002 by ASME
1 citations