EFFECT OF LIQUID INERTIA AND WALL POROSITY ON THE PROCESS 
OF MOMENTUM TRANSFER IN A BIOBEARING WITH INJECTION
OF A LUBRICANT
A. Valitskaya,a A. A. Makhanek,b and
S. A. Gubarevb

UDC 621.89.001.57

We consider the flow of a compressed Newtonian fluid 
in a biological bearing that has a porous wall, i.e., in a hip joint. 
The system is modeled by two curvilinear surfaces and a porous wall 
bounded by a curved impermeable surface. The flow in the gap is considered 
with account for inertia forces. The Navier-Stokes 
and Poisson equations used are separated with the aid of the Morgan 
-Cameron approximation. A solution which relies on the 
averaging of inertia forces is obtained in a closed form. A bearing 
of spherical shape is considered as an example.

aTechnical University of Zielona Gora, Polska; 
bAcademic Scientific Complex "A. V. Luikov Heat and Mass 
Transfer Institute," National Academy of Sciences of Belarus, Minsk, 
Belarus. Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 74, No. 3, 
pp. 216-219, May-June, 2001. Original article submitted February 14, 2001.

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