Analysis of squeeze film performance between rough porous infinitely long parallel plates with porous matrix of non-uniform thickness under presence of magnetic fluid lubricant

2009 ◽  
Vol 3 (2) ◽  
pp. 49-55 ◽  
Author(s):  
R. M. Patel ◽  
G. M. Deheri ◽  
H. C. Patel
Keyword(s):  
Magnetic Fluid ◽  
Porous Matrix ◽  
Squeeze Film ◽  
Parallel Plates ◽  
Uniform Thickness ◽  
Film Performance

Magnetohydrodynamic Squeeze Film Characteristics Between Parallel Circular Plates Containing a Single Central Air Bubble in the Inertial Flow Regime

1999 ◽  
Vol 66 (4) ◽  
pp. 1021-1023 ◽  
Author(s):  
R. Usha ◽  
P. Vimala
Keyword(s):  
Magnetic Field ◽  
Differential Equation ◽  
Nonlinear Differential Equation ◽  
Bubble Radius ◽  
Fluid Film ◽  
Squeeze Film ◽  
Parallel Plates ◽  
Circular Plates ◽  
Air Bubble ◽  
Approximate Analytical Solutions

In this paper, the magnetic effects on the Newtonian squeeze film between two circular parallel plates, containing a single central air bubble of cylindrical shape are theoretically investigated. A uniform magnetic field is applied perpendicular to the circular plates, which are in sinusoidal relative motion, and fluid film inertia effects are included in the analysis. Assuming an ideal gas under isothermal condition for an air bubble, a nonlinear differential equation for the bubble radius is obtained by approximating the momentum equation governing the magnetohydrodynamic squeeze film by the mean value averaged across the film thickness. Approximate analytical solutions for the air bubble radius, pressure distribution, and squeeze film force are determined by a perturbation method for small amplitude of sinusoidal motion and are compared with the numerical solution obtained by solving the nonlinear differential equation. The combined effects of air bubble, fluid film inertia, and magnetic field on the squeeze film force are analyzed.

Forced Convection in a Channel Filled With Porous Medium, Including the Effects of Flow Inertia, Variable Porosity, and Brinkman Friction

1987 ◽  
Vol 109 (4) ◽  
pp. 880-888 ◽  
Author(s):  
D. Poulikakos ◽  
K. Renken
Keyword(s):  
Porous Medium ◽  
Forced Convection ◽  
Flow Model ◽  
Saturated Porous Medium ◽  
Porous Matrix ◽  
Parallel Plates ◽  
Entry Length ◽  
Variable Porosity ◽  
Flow Inertia ◽  
Temperature And Flow Fields

This paper presents a series of numerical simulations which aim to document the problem of forced convection in a channel filled with a fluid-saturated porous medium. In modeling the flow in the channel, the effects of flow inertia, variable porosity and Brinkman friction are taken into account. Two channel configurations are investigated: parallel plates and circular pipe. In both cases, the channel wall is maintained at constant temperature. It is found that the general flow model predicts an overall enhancement in heat transfer between the fluid/porous matrix composite and the walls, compared to the predictions of the widely used Darcy flow model. This enhancement is reflected in the increase of the value of the Nusselt number. Important results documenting the dependence of the temperature and flow fields in the channel as well as the dependence of the thermal entry length on the problem parameters are also reported in the course of the study.

scholarly journals Effect of Pressure Dependent Viscosity on Couple Stress Squeeze Film Lubrication between Rough Parallel Plates

2015 ◽  
Vol 10 (1) ◽  
pp. 76-83 ◽  
Author(s):  
Neminath Bujappa Naduvinamani ◽  
Siddangouda Apparao ◽  
Hiremath Ayyappa Gundayya ◽  
Shivraj Nagshetty Biradar
Keyword(s):  
Couple Stress ◽  
Squeeze Film ◽  
Parallel Plates ◽  
Effect Of Pressure ◽  
Pressure Dependent Viscosity ◽  
Dependent Viscosity ◽  
Film Lubrication

Magnetic fluid‐based squeeze film between porous rotating rough circular plates

2009 ◽  
Vol 61 (3) ◽  
pp. 140-145 ◽  
Author(s):  
Himanshu Patel ◽  
Gunamani M. Deheri ◽  
Rakesh M. Patel
Keyword(s):  
Magnetic Fluid ◽  
Squeeze Film ◽  
Circular Plates
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