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Journal of Porous Media
Fator do impacto: 1.752 FI de cinco anos: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN Imprimir: 1091-028X
ISSN On-line: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v20.i10.20
pages 881-898

NON-NEWTONIAN FLUID MODEL FOR PRESSURE-DRIVEN FLOW BETWEEN POROUS AND ROUGH SURFACES IN JOURNAL BEARING

Ramesh B. Kudenatti
Department of Mathematics, Bangalore University, Central College Campus, Bangalore-560001, India
V. S. Madalli
Department of Mathematics and MCA, KLE Institute of Technology, Hubballi-580 030, India
D. P. Basti
Department of Mathematics, SDM College of Engineering & Technology, Dharwad-580 002, India

RESUMO

This paper investigates the longitudinal and transverse roughness effects on the performance of short porous journal bearings in the presence of applied magnetic field when the couple-stress fluid is taken in the fluid film region. Two-dimensional full-Reynolds equations that account for various physical aspects are derived for both roughness patterns. Closed-form solutions are obtained for the pressure and load capacity as a function of various parameters for both structures, and the solutions are compared with corresponding classical cases. It is observed that the effect of increasing the Hartmann number is to increase the pressure and load capacity for both patterns, whereas for decreasing couple-stress fluid and permeability parameters these are found to be increasing. The fluid dynamics behind these mechanisms is discussed in detail.


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