Tube Wall - Roughness Coefficients
We currently model the exterior of tube walls (the boundary of our model) that look like this:
...as flat walls without a boundary layer mesh. (Can['t do it anyother way due to limited computing and time resources.)
The mesh height on the walls is 8" to 12", and the tubes are 2-1/2" OD (R1-1/4")
Does anyone have any experience on the best Roughness Height and Roughness Coefficient to use for this situation? Radiation is dominant, but Convection and Conduction are not negligible.
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