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CSME 2018/08
Volume 39 No.4
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419-425
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Fluid Inertia Force Effects in Hydromagnetic Circular Stepped Squeeze Films
Jaw-Ren Lina, Li-Ming Chub and Tzu-Chen Hungc
aDepartment of Mechanical Engineering, Nanya Institute of Technology, Taoyuan, Taiwan 32091, ROC.
bDepartment of Applied Science, Interdisciplinary Program of Green and Information Technology, National Taitung University, Taitung, Taiwan 95092, ROC.
cDepartment of Mechanical Engineering, National Taipei University of Technology, Taipei, Taiiwan 10608, ROC.
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Abstract:
On the basis of the hydromagnetic flow theory, an inertia hydromagnetic lubrication equation has been derived for circular stepped squeeze film disks by applying the momentum integral method. Analytical solution of the film pressure, the load capacity and the squeeze film time are obtained in the present paper. It is found that the hydromagnetic squeeze film including the influences of fluid inertia forces provides an increased load capacity as well as a longer squeeze film time as compared to the non-inertia non-conducting-lubricant case. The improved squeeze film characteristics are further emphasized for the circular stepped disks operating at larger values of the density parameter and the magnetic Hartmann number, and smaller values of the radius ratio and the step height ratio.
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Keywords: circular stepped disks, inertia forces, electrically conducting fluids, momentum integral method.
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©
2018
CSME , ISSN 0257-9731
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