To further extend knowledge about fluid film friction in elastohydrodynamic contact, it is important\nto examine how lubricant flows. In this paper, several film thickness results obtained by interferometry technique\nfor different kinds of experiments were analyzed and discussed based on lubricant flow continuity. Results of\ntwo steady-state and two transient experiments are presented. Possible speed profiles that can explain observed\nfilm thickness distributions were suggested. It is shown that major part of present experiments can be explained\nby a single speed profile known as a plug flow. This finding is in contradiction to usual linear speed profile\npredicted by Reynolds equation.
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