4.2. Elastic ball sliding against a rigid plane
As the second example, we consider a hyperelastic ball sliding against a rigid plane in steady-state conditions. The setup corre- sponds to that studied experimentally in Section 2, except that the curvature of the sliding path and the related spin are neglected here. However, the geometrical and material parameters are different, as they are identical to those used in the soft-EHL example in [20, Section 4.5], see Table 3. Note that the highest entrainment speeds considered (reaching 105 mm/s) are clearly unrealistic, but they are included in the analysis for completeness. The lowest entrainment speed U ¼ 100 mm/s corresponds to U ¼ 1:33 10 6 , and this value corresponds to Uη ¼ 0:027 N=m in the experiment in Section 2. Simulation of lower entrainment speeds is possible, see [20], but a finer mesh is then needed. The dimensionless load W is here between 0.0018 and 0.074, and this approximately corresponds to the range of dimensionless loads (between 0.00024 and 0.018) examined in Section 2.