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November 23, 2011, 11:00
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Tube Wall - Roughness Coefficients
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Member
Ronald A. Lau
Join Date: Jul 2009
Location: Chicago
Posts: 30
Rep Power: 10   |
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. TIA, R. |
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| bcs, walls |
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