Discussion: “Quantitative Comparisons Between Measured and Solved EHL Dimples in Point Contacts,” (Yang, P., Kaneta, M., and Masuda, S., 2003, ASME J. of Tribology, 125(1), pp. 210–214)

Abstract

The authors have produced a compelling argument to explain EHL dimple formation as resulting from a temperature-viscosity effect. I believe that their explanation is correct. They have solved the EHL problem for film thickness and traction and compared these with measurements. Any claims of providing quantitatively correct comparisons between experiment and numerical solutions are, however, tainted by the fact that the authors have misrepresented the viscosity of their lubricant in spite of having obtained viscosity measurements.