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Error Correction in COMSOL Document
Posted Mar 4, 2022, 9:41 p.m. EST General, Heat Transfer & Phase Change Version 5.5 1 Reply
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In "Heat Transfer Module > User's Guide > Theory for the Heat Transfer Module > Theory for Thermal Contact", the relative pressure p ⁄ Hc calculated by the follwing equation is from the Ref.1.
P/Hc=(P/(c1(1.62sigma/sigma0m)^c2))^(1/(1+0.071c2)); 1. A. Bejan and others, Heat Transfer Handbook, John Wiley & Sons, 2003.
However, in many other papers, containing the reference of the wrong equation in Ref.1, p ⁄ Hc using the following equation instead. The difference with the above one is its math symbol before the variable m.
P/Hc=(P/(c1(1.62sigma/sigma0/m)^c2))^(1/(1+0.071c2)); *2. S. Song and others, Relative Contact Pressure: Dependence on Surface Roughness and Vickers Microhardness, Journal of thermophysics and heat transfer, 1988. 3. M. Bahrami and others. Modeling Thermal Contact Resistance: A Scale Anslysis Approach, J. Heat Transfer, 2004.
I am not sure if it has other influence in Comsol, though any impacts has not had on CMY conductance model in my limited simulation.
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Dear 程万里 鹏,
Thank you for posting on the Discussion Forum.
You are right, there is a mistake in our documentation. I want to emphasize that the equations are solved using the correct formula:
as you wrote it, so there is no worries to have about the results.
Thank you for pointing out this mistake, we have corrected the documentation.
Best regards,
Anthony Paumier