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-   -   Heat Transfer convergence Problem mit a 1/6 compressor model (http://www.cfd-online.com/Forums/cfx/83894-heat-transfer-convergence-problem-mit-1-6-compressor-model.html)

chili023 January 14, 2011 05:38

Heat Transfer convergence Problem mit a 1/6 compressor model
 
He guys

I am simulating a 1/6 model of a compressor at different rpms and with different geometry on an unstructured net with 8 prismlayers.
My momentum and Mass residuals look great as well as the turbulence residuals. But my heat transfer does not reach convergence, espacially when i apply a geometrical change to the model. The original model (no geometrical change) reaches convergence after 120 iterations.

I am simulating just the fluid with the following setups
inlet run static
compressor wheel rotating
outlet run
stationary simulation
Total Energy
SST
Adiabatic walls
Mass flow outlet
Air ideal Gas
Opening as Inlet

My main concern is the efficiency so the tmperatur is quit important.
Does anybody has an idea?

ghorrocks January 15, 2011 07:41

http://www.cfd-online.com/Wiki/Ansys...gence_criteria


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