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Why the entropy is decreasing through the flow |
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May 13, 2023, 01:49
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Why the entropy is decreasing through the flow
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#1 |
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New Member
Yuanhua Liu
Join Date: Dec 2021
Posts: 3
Rep Power: 4  |
I was simulating a compressor with volute. I made some streamlines in CFD-Post and it seems the static entropy first go up and then decreased. As the flow is approximately adiabatic in compressor, how can static entropy goes down?
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May 13, 2023, 09:10
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#2 |
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Senior Member
Join Date: Jun 2009
Posts: 1,823
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Have you computed the massFlowAve(Static Entropy)@Inlet and Outlet and compared them?
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Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum. |
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May 15, 2023, 03:36
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#3 | |
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New Member
Yuanhua Liu
Join Date: Dec 2021
Posts: 3
Rep Power: 4 |
Quote:
(massFlowAve(Static Entropy)@Plane 1 - massFlowAve(Static Entropy)@Plane 2 )/ massFlowAve(Static Entropy)@Plane 1 And it trend to be the Static Entropy decreased about 3%. |
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| ansys, cfd-post, cfx |
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