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September 22, 2010, 05:21 |
high temperature in a coupling simulation
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#1 |
Member
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Hello,
i'm trying to simulate the flow into a bend (90°) with a coupling between Star-CCM+ and GT-Power. The boudaries are : inlet, bend and outlet temperature : 300K inlet pressure : sinusoidal from 1 to 1,5 bar (period 0,04 s) bend and outlet pressure : 1 bar compressible ideal gas (O2 and N2) I can simulation the flow but the temperature in the bend is 1300K at the end. Why do I get this temperature ? Thank you in advance Best regards Simon |
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September 23, 2010, 13:43 |
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#2 |
Member
John
Join Date: Aug 2009
Posts: 92
Rep Power: 17 |
Is the flow fully converged? Are the residuals and any flow quantities you are measuring fully converged? Is this 1300K only in a few cells or across a bigger region?
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September 26, 2010, 05:22 |
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#3 | |
Member
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Quote:
The high temperature is located in a big region of the bend. Can I use the residuals when I calculate unsteady ? My residuals are onto 10^6 for Tdr and 10^4 for the others (for a steady calculation it's not good and for a unsteady simulation?). Thank you Best regards |
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September 30, 2010, 14:56 |
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#4 |
Member
John
Join Date: Aug 2009
Posts: 92
Rep Power: 17 |
The size of the residual doesn't really matter so long as the value, or the mean of the residual oscillation remains fairly constant from one iteration to the next.
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