The run-off condition for rimming flow of a power-law fluid

The rimming flow of a power-law fluid in the inner surface of a horizontal rotating cylinder is investigated. Exploiting the fact that the liquid laye r is thin, the simplest lubrication theory is applied. The generalized run- off condition for the steady-state flow of the power-law liquid is derived. In the bounds implied by this condition, film thickness admits a continuou s solution. In the supercritical case when the mass of non-Newtonian liquid exceeds a certain value or the speed of rotation is less than an indicated limit, a discontinuous solution is possible and a hydraulic jump may occur in the steady-state regime. The location and height of the hydraulic jump for the power-law liquid is determined.