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displaying HTC and calculating Q across interface in CHT

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Old   November 18, 2020, 20:21
Default displaying HTC and calculating Q across interface in CHT
Tyler Richardson
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i have a CHT model of a pipe - there is a heat flux profile mapped to the OD of the solid pipe, which i can visually see in CFD-Post is accurate. I can also see that there is some thermal gradient in my solid / fluid, although their distribution and magnitude seem a bit suspect in some areas (i see some peaks and valleys at solid-solid interfaces... maybe a mesh issue or overlaying interfaces).

My issue lies with the determining that integral of the heat flux into the fluid is equal to the integral of the heat flux on the boundary (make sure the heat is conserved)

When i open CFD Post / Function calculator - i go to take the area integral of the wall heat flux of my heat profile on my solid boundary, and i get the Heat i expect. When i do the same for the fluid side of the interface b/w solid and fluid and i get "No Data Exists for Variable "Wall Heat Flux"". Further, when i try to plot it as a contour, nothing shows up.


when i look to see the HTC on the fluid side of the interface - the option simply is not there! Is there any scenario where my CHT run would solve (and exchange heat between solid/fluid based on visual inspection of the temperature), but not produce this as a plottable result in CFD Post? Do i need to turn something on?

any help greatly appreciated

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cht, heat transfer coefficient, htc, wall heat flux

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