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Different boundary condition for different scalar fields |
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August 21, 2017, 17:37 |
Different boundary condition for different scalar fields
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New Member
Andy
Join Date: Aug 2015
Posts: 8
Rep Power: 11 |
Hello,
I have two temperature fields, a solid temperature T_s and a fluid temperature T_f. These are created as two separate volScalarFields, modelling a flow though packed spheres between parallel plates, the upper wall is heated with a constant heat flux and the lower wall is adiabatic. I am just solving a scalar transport equation for both temperatures. I set the temperature of the fluid T_f = 300K at the inlet. My reference says to set the solid temperature T_s = T_f at the upper wall of the parallel plates where the constant heat flux condition is located. For the constant heat flux condition at the upper wall I need to set the gradient of the fluid temperature dT_f/dy = q/k. T_f at the wall is not known in advance and must be computed as part of the solution. Once it is known, I need to set T_s = T_f at the upper wall. I have set fixedGradient at the upper wall, which works for the fluid temperature, but I wondered how use a separate boundary condition for the solid temperature at the upper wall? Thanks in advance for any help, A. |
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Tags |
boundary conditon, gradient, heat flux., scalar field |
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