A transient finite element cavitation algorithm with application to radial lip seals

The presented elastohydrodynamic (EHD) formulation allows accurate analysis of lubricant film breakdown and reformation during the operation of lubricated devices. The algorithm is based on finite-element discretization and the JFO model. Active and non-active lubricant film zones are determined for non-stationary operating conditions. The model was validated through comparisons with previously published studies. The presented results show the shape of rupture boundaries, with a sample of plots demonstrating the efficiency of the algorithms in solving complex problems, such as the EHD lubrication of lip seals. The analysis of thickness, pressure and filling rate fields allows the optimisation of lip seal element design and demonstrates the efficiency of the lubricant feeding device.