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  • MECHANICAL ENGINEERING  (3)
  • 1990-1994  (3)
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  • 1
    facet.materialart.
    Unknown
    On the mixture flow problem in lubrication of hydrodynamic bearings - Small solid volume fraction (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The lubrication problem of infinitely long slider bearings with a mixture of fluid and particulate solid at small volume fraction level is studied. Closed-form analytical solutions for pressure and shear stress are obtained for a class of solid aggregates. The results reduce to those of pure fluid in the limiting case. A parametric study of the bearing performance with particulate solid is presented.
    Keywords: MECHANICAL ENGINEERING
    Type: STLE Tribology Transactions (ISSN 0569-8197); 35; 45-52
    Format: text
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  • 2
    facet.materialart.
    Unknown
    On the solution of a lubrication problem with particulate solids (1991)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The lubrication characteristic of a fluid with solid particles is studied using the continuum theory of mixtures. The governing equations are formulated and appropriate boundary conditions are introduced for an arbitrary-shaped lubricant film thickness. As a special case, closed-form analytical perturbation solutions for pressure and shear stress are obtained for a mixture of a conventional oil and solid particles with small values of solid-volume fraction sheared in the clearance space of an infinitely long slider bearing. It is found that when compared with a pure fluid, the mixture of the fluid and solid generates a higher pressure and therefore a higher load-carrying capacity with the added advantage of a reduction in the coefficient of friction.
    Keywords: MECHANICAL ENGINEERING
    Type: International Journal of Engineering Science (ISSN 0020-7225); 29; 9, 19; 1019-103
    Format: text
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  • 3
    facet.materialart.
    Unknown
    A continuum theory of a lubrication problem with solid particles (1993)
    In:  Other Sources
    Details
    Publication Date: 2019-08-27
    Description: The governing equations for a two-dimensional lubrication problem involving the mixture of a Newtonian fluid with solid particles at an arbitrary volume fraction are developed using the theory of interacting continuua (mixture theory). The equations take the interaction between the fluid and the particles into consideration. Provision is made for the possibility of particle slippage at the boundaries. The equations are simplified assuming that the solid volume fraction varies in the sliding direction alone. Equations are solved for the velocity of the fluid phase and that of the solid phase of the mixture flow in the clearance space of an arbitrary shaped bearing. It is shown that the classical pure fluid case can be recovered as a special case of the solutions presented. Extensive numerical solutions are presented to quantify the effect of particulate solid for a number of pertinent performance parameters for both slider and journal bearings. Included in the results are discussions on the influence of particle slippage on the boundaries as well as the role of the interacting body force between the fluid and solid particles.
    Keywords: MECHANICAL ENGINEERING
    Type: ASME, Transactions, Journal of Applied Mechanics (ISSN 0021-8936); 60; 1; p. 48-58.
    Format: text
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