A theory for predicting the behavior of powder lubricated slider bearings based on the collisional characteristics of the grain particles and their interactions at the boundaries is presented. General boundary conditions that account for the effects of powder slippage are applied to the slider bearing configuration. Theoretical predictions are presented with comparison to published experimental measurements. An extensive parametric study is also conducted to illustrate the behavior of the flow and the response of the bearing’s load-carrying capacity and friction factor to changes in various powder material and boundary parameters.

1.
Campbell
Charles
,
1993
, “
Boundary Interactions for Two-Dimensional Granular Flows. Part 2. Roughened Boundaries
,”
Journal of Fluid Mechanics
, Vol.
247
, pp.
137
156
.
2.
Dai
F.
,
Khonsari
M. M.
, and
Lu
Y. Z.
,
1994
, “
On the Lubrication Mechanism of Grain Flows
,”
Tribology Transactions
, Vol.
37
, pp.
516
424
.
3.
Elrod, H. G., and Brewe, D. E., 1992, “Numerical Experiments with Flows of Elongated Granules,” NASA TM #105567, AVSCOM TR#91-C-006.
4.
Haff
P. K.
,
1983
, “
Grain Flow as a Fluid Mechanical Phenomenon
,”
Journal of Fluid Mechanics
, Vol.
134
, pp.
401
430
.
5.
Heshmat
Hooshang
,
1991
, “
The Rheology and Hydrodynamics of Dry Powder Lubrication
,”
Tribology Transactions
, Vol.
34
, No.
3
, pp.
433
439
.
6.
Heshmat
Hooshang
,
1992
, “
The Quasi-Hydrodynamic Mechanism of Powder Lubrication: Part II—Lubricant Film Pressure Profile
,”
Lubrication Engineering
, Vol.
48
, No.
5
, pp.
373
383
.
7.
Heshmat
Hooshang
,
1995
, “
The Quasi-Hydrodynamic Mechanism of Powder Lubrication: Part III—On Theory and Rheology of Triboparticulates
,”
Tribology Transactions
, Vol.
38
, No.
2
, pp.
269
269
.
8.
Hui
K.
,
Haff
P. K.
,
Ungar
J. E.
, and
Jackson
R.
,
1984
, “
Boundary Conditions for High-Shear Grain Flows
,”
Journal of Fluid Mechanics
, Vol.
145
, pp.
223
233
.
9.
Jenkins
J. T.
, and
Richman
M. W.
,
1986
, “
Boundary Conditions for Plane Flows of Smooth, Nearly Elastic, Circular Disks
,”
Journal of Fluid Mechanics
, Vol.
171
, pp.
53
69
.
10.
Johnson
P. C
, and
Jackson
R.
,
1987
, “
Frictional-collisional Constitutive Relations for Granular Materials, with Application to Plane Shearing
,”
Journal of Fluid Mechanics
, Vol.
176
, pp.
67
93
.
11.
McKeague, K. T., and Khonsari, M. M., 1995, “Generalized Boundary Interactions for Powder Lubricated Couette Flows,” To appear in ASME JOURNAL OF TRIBOLOGY.
12.
Yu, C., Craig, K., and Tichy, J., 1994, “Granular Collision Lubrication,” Journal of Rheology, pp. 921–936.
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