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Old   November 10, 2008, 03:39
Default floating point exception
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mojtaba
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hi everybody I tried to model a viscous flow by "pressure inlet" and "pressure outlet" in FLUENT but there is a trouble and FLUENT announced "floating point exception" and suddenly solve is terminate with error. I can't solve my problem. I studied FLUENT manual. It offers that applicants should use "velocity inlet"! But my problem is that I have to use "pressure inlet". I applied inlet, outlet and opening boundary conditions together but solve failed too soon. What can I do? I would be very grateful for any advice.

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Old   November 11, 2008, 03:18
Default Re: floating point exception
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Josh Kempenaar
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If you must use a pressure inlet, try obtaining convergence with a velocity inlet that approximates the pressure inlet first and then switching to a pressure inlet.
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Old   November 15, 2008, 08:04
Default Re: floating point exception
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Mojtaba
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Hi and thank for your attention I studied your comment. I'll try to solve my problem in regard to your advice. But how can I switch velocity inlet to pressure inlet? Do I have to write a "UDF"? Or I should stop solve and change boundary condition and iterate again? I'll announce you results. Good luck.

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Old   November 15, 2008, 18:15
Default Re: floating point exception
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Josh Kempenaar
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You just need to stop the solve once the solution has converged on a velocity inlet and then switch the boundary condition and start iterating again. I have had good luck with this in the past.

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Old   November 16, 2008, 05:23
Default Re: floating point exception
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Mojtaba
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Thank Josh Good Luck
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