A study of magnetic fluid based squeeze film behaviour between porous circular plates with a concentric circular pocket and effect of surface roughness

2003 ◽  
Vol 55 (1) ◽  
pp. 32-37 ◽  
Author(s):  
R.M. Patel ◽  
G.M. Deheri
Keyword(s):  
Surface Roughness ◽  
Magnetic Fluid ◽  
Squeeze Film ◽  
Circular Plates ◽  
Effect Of Surface

scholarly journals EFFECT OF SURFACE ROUGHNESS ON CHARACTERISTICS OF MAGNETIC FLUID BASED SQUEEZE FILM BETWEEN POROUS CIRCULAR PLATES

2020 ◽  
Vol 14 (1) ◽  
pp. 90-98
Author(s):  
P. L. Thakkar ◽  
H. C. Patel
Keyword(s):  
Surface Roughness ◽  
Magnetic Fluid ◽  
Carrying Capacity ◽  
Type Equation ◽  
Squeeze Film ◽  
Load Carrying Capacity ◽  
Circular Plates ◽  
Load Carrying ◽  
Better Than ◽  
Effect Of Surface

The effect of surface roughness on characteristics of magnetic fluid based squeeze film between porous circular plates is hypothetically analysed. The pressure distribution is obtained by solving concern Reynolds type equation with suitable boundary conditions and the result is utilized to obtain load carrying capacity. It is concluded that the load carrying capacity increases with increasing magnetization, while load carrying capacity decreases due to the standard deviation. It is observed that the negatively skewed roughness and negative mean increase the load carrying capacity. It is also observed that the magnetic fluid lubricant improves the performance of a bearing system, thereby, suggesting that the performance of the bearing with magnetic fluid lubricant is better than the conventional lubricant.

scholarly journals Effect of Surface Roughness on the Squeeze Film Characteristics of Circular Plates in the Presence of Conducting Couplestress Fluid and Transverse Magnetic Field

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Syeda Tasneem Fathima ◽  
N. B. Naduvinamani ◽  
J. Santhosh Kumar ◽  
B. N. Hanumagowda
Keyword(s):  
Magnetic Field ◽  
Surface Roughness ◽  
Transverse Magnetic ◽  
Squeeze Film ◽  
Circular Plates ◽  
Roughness Effects ◽  
Modified Equations ◽  
Load Carrying ◽  
Film Characteristics ◽  
Effect Of Surface

The combined effect of surface roughness and magnetic field on the performance characteristic of the circular plates lubricated with conducting couplestress fluid (CCSF) has been studied. On the basis of the Christensen Stochastic model, the generalized stochastic Reynold’s equation is derived. Modified equations for the nondimensional pressure, load load-carrying capacity, and squeeze film time are derived. The results are presented both numerically and graphically and compared with conducting smooth surface case. It is observed that the surface roughness effects are more pronounced for couplestresses as compared to nonconducting Newtonian fluid (NCNF) in the presence of magnetic field.

Effect of surface roughness on couple stress squeeze film lubrication of long porous partial journal bearings

2006 ◽  
Vol 58 (4) ◽  
pp. 176-186 ◽  
Author(s):  
N.M. Bujurke ◽  
N.B. Naduvinamani ◽  
Syeda Tasneem Fathima ◽  
S.S. Benchalli
Keyword(s):  
Surface Roughness ◽  
Couple Stress ◽  
Journal Bearings ◽  
Squeeze Film ◽  
Film Lubrication ◽  
Effect Of Surface

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

scholarly journals Numerical Modelling of Squeeze Film Performance between Rotating Transversely Rough Curved Circular Plates under the Presence of a Magnetic Fluid Lubricant

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Nikhilkumar D. Abhangi ◽  
G. M. Deheri
Keyword(s):  
Magnetic Fluid ◽  
Random Variable ◽  
Squeeze Film ◽  
Circular Plates ◽  
Random Roughness ◽  
Load Carrying ◽  
Nonzero Mean ◽  
Mean Variance ◽  
Positive Effect ◽  
Bearing System

An endeavour has been made to study and analyze the behaviour of a magnetic fluid-based squeeze film between curved transversely rough rotating circular plates when the curved upper plate lying along a surface determined by an exponential function approaches the curved lower plate along the surface governed by a secant function. A magnetic fluid is used as the lubricant in the presence of an external magnetic field oblique to the radial axis. The random roughness of the bearing surfaces is characterised by a stochastic random variable with nonzero mean, variance, and skewness. The associated nondimensional averaged Reynolds equation is solved with suitable boundary conditions in dimensionless form to obtain the pressure distribution, leading to the expression for the load carrying capacity. The results establish that the bearing system registers an enhanced performance as compared to that of the bearing system dealing with a conventional lubricant. This investigation proves that albeit the bearing suffers due to transverse surface roughness, there exist sufficient scopes for obtaining a relatively better performance in the case of negatively skewed roughness by properly choosing curvature parameters and the rotation ratio. It is appealing to note that the negative variance further enhances this positive effect.

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