Abstract:In order to study the influence of slip velocity on the cavitation effect of texture surface, a single twodimensional calculation model of micro convex body texture was established. Using the method of CFD simulation, as the change of sliding velocity, the changing rules of the cavitation effect in gas volume rate, pressure distribution and wall shear stress were obtained. The results show that when sliding speed is not more than 5 m/s, any cavitations can not be produced on the texture surface of the fluid; when the slip velocity gradually increases from 5 m/s to 20 m/s, cavitations will be generated in the convergence area of texture fluid outlet, and the size of the cavitations will be decreased with the increase of the slip velocity, and the gas volume rate of the cavitations will be increased with the increase of the slip velocity; when the slip velocity continues to increase from 20 m/s to 30 m/s and reaches a certain value, the size of the cavitations will be decreased no longer, and the gas volume rate of the cavitations still increases with the increase of the slip velocity; when the slip velocity is between 5 m/s to 30 m/s, the greater slip velocity will be corresponding to the greater extra capacity and the greater wall shear stress. In addition, the existence of cavitations will contribute to reduce the wall shear stress.
