buoyancy source term in k-e model

Catherine Meissner

Hello, I try to activate the buoyancy source term in k-e model. But I am not sure how to do it correctly. I would be glad if someone could help!

I solve the temperature equation (TEM1) and use constant density so that the model should use the boussinesq approximation. Then I have to set 5 parameters according to the PHOENICS description BUOYA=0.0;BUOYB=0.0;BUOYC=-9.81;BUOYD = -BETA ;BUOYE = TEM1,ref The formular of the buoyancy term is given as Gb = ENUT * BETA * gi * {TEM1,i}/PRT(TEM1) everything is clear except the last parameter. Why should I give a constant temperature here? In my opinion BUOYE determines TEM1,i and this temperature is not constant!!! Can anybody tell my what BUOYE is? Thanks in advance,

Catherine