Optimization of the computational domain for EHL point contacts

Many investigations of the oil film thickness and friction in the EHL point contact under starved and flooded conditions are conducted. However, in these investigations the lubrication regions are limited and there is a lack of numerical investigations on the lubrication performance, which considers the transition regions between the lubrication regimes. To ensure accurate calculations that encompass the transition between the lubrication regime in the EHL point contact, we propose a normalization method for the optimized computational domain which is not based on the Hertzian radius. Furthermore, the outlet side is defined to satisfy continuity conditions, including cavitation, at the exit boundary. Hence, employing the proposed normalization method can help to improve the accuracy and reliability of the numerical analysis of machine assemblies including rolling-sliding parts, which operate under EHL conditions. This is foreseen to lead to better design of these assemblies, potentially improving their lifespan and efficiency.