|December 6, 2010, 04:34||
Viscous work term query
Join Date: Jul 2009
Location: Portsmouth, England
Posts: 484Rep Power: 15
For the total energy equation there's a check box to include the work due to viscous stresses term in the energy equation.
Why is it that by default this term is omitted from the energy equation and requires being separately activated? What sort of simulations require the total energy equation but not the viscous work term (it's not a Euler situation)? Would it not be better to solve the whole equation by default?
My simulation (Mach no. 0.85, Re no. 5x10^6) shows a 20 deg C higher surface temperature (on average) with the viscous work term included (see image).
Last edited by siw; December 6, 2010 at 07:14. Reason: Added image
|December 6, 2010, 07:41||
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 12,638Rep Power: 98
Viscous work is insignificant for most compressible flow models. Looks like you have found one where it is not. There is no point adding extra terms in the equation when they do not do anything for most models.
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