CFD analysis of artificial slippage and surface texturing in lubricated sliding contact considering cavitation

Abstract

The effect the effectiveness of the liquid suction heat exchanger to performance of cold storage with refrigerant R22, R404A and R290/R600a AIP Conference Proceedings 1788, 030067 (2017) Abstract. The present paper explores the effect of slip variation for Newtonian and non-Newtonian lubricants on textured slider bearing performance considering cavitation. Investigations are carried out by using a numerical method based on commercial CFD (computational fluid dynamic) software ANSYS for fluid flow phenomenon to assess the tribological characteristic (i.e. hydrodynamic pressure distribution) of a lubricated sliding contact. The Zwart-Gerber-Belamri model for cavitation is adopted. To model hydrophobicity, i.e. slippage, the enhanced user-defined-function (UDF) in the FLUENT® package is developed. The numerical results show that the cavitation modeling has a huge effect on the performance. Neglecting the cavitation leads to a less accurate result. Also, regarding the effect of slip variation, it is found that the single slip is the best pattern to improve the pressure profile.