Thin layer flow in rolling element bearings

Replenishment of the EHL contacts in a grease lubricated ball bearing

“…Models for starved EHL contacts are well established. The main development here has been done in PhD studies and resulting papers from Chevalier [14,15], Damiens [16,17] and Van Zoelen [18][19][20][21]. In several papers an attempt has been made to model the interaction between successive contacts such as we have them in a rolling bearing.…”

“…Chevalier [15] derived a relation between the film thickness and this inlet layer thickness. Both Damiens [16,17] and Van Zoelen and co-workers [18][19][20][21] assumed that the outlet layer thickness of a contact would act as the inlet layer thickness of the next one. This also happened in the experiments from Svoboda et al [22] on a ball-on-disc rig with multiple contacts.…”

Drop-on-Demand Printing as Novel Method of Oil Supply in Elastohydrodynamic Lubrication

“…Starved contact results for time-varying contacts were presented in [12][13][14]. Using insights obtained from the starved lubrication studies, van Zoelen [15][16][17] introduced a new approach based on free surface layer modeling of contacts. He showed that in the absence of resupply, the film thickness rapidly decays in a period of only minutes, and provided experimental validation for a single contact.…”

Experimental measuring set‐up and procedure for the traction coefficient on roller‐on‐disc contact

“…Recently, Van Zoelen developed a model to predict the film thickness decay rate of rolling bearings lubricated with high viscosity oils. This model was applied to lubricating greases using its base oil as input and the residual layer thickness as zero level, presenting a remarkable result that point out to new research lines, which aim on the study of the thickener–additives–surface interaction on forming thick boundary layers and their characteristics.…”