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Invalid Cp error at a specific temperature in Fluent |
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March 15, 2024, 05:09 |
Invalid Cp error at a specific temperature in Fluent
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New Member
MB
Join Date: Sep 2022
Posts: 8
Rep Power: 3 |
Dears,
I am simulating a free jet CO2 through a micro-orifice. I have supercritical upstream conditions, and subcritical downstream conditions. I am using Peng Robinson real gas equation. Model works perfectly fine as long as the inlet temperature is >310 K. If I reduce the the inlet temperature to less than that, the model diverges and I get the error 'Invalid Cp (- xxxxx) at T= xxxx'. Note that I am starting from a converged solution at T=310 K, and slightly changing T to 308 K (for example). I understand that this is a pseudo-critical region where properties of CO2 vary abruptly. So my question is would someone kindly suggest how to deal with this issue in Fluent? Thank you, |
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