Abstract
Since the thermoelastohydrodynamic and elastohydrodynamic lubrication (TEHL and EHL) problems are predominantly heat transfer (HT) and/or fluid mechanics (FM) problems, it is proposed that the pertinent dimensionless quantities defined, in some instances tabulated, and commonly used in these branches of engineering science (HT and FM) should be used consistently and uniformly throughout for TEHL and EHL studies. In support of this, it is shown by some mathematical considerations that the published dimensionless quantities (in the TEHL and the EHL problems) can be converted into HT and FM parameters—such as the Reynolds number, Euler number, Eckert number, Prandtl number or Fourier modulus. It is indicated that such parameters have an immediately recognizable physical meaning.
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