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March 9, 2006, 06:35
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cavitation in fluent
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#1 |
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Guest
Posts: n/a
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Hi All,
My run with cavitation in fluent is not converging well. I played with URF, but not that useful. Reducung URF is only reducing the speed of the run. Kindly guide. If there is any specific trick. |
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March 9, 2006, 07:21
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Re: cavitation in fluent
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#2 |
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Guest
Posts: n/a
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Try this: Pressure-velocity coupling: SIMPLEC Discretization for pressure: Linear all other: 1st order URF: all at 0.1 Convergence will be slow
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March 9, 2006, 07:53
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Re: cavitation in fluent
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#3 |
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Guest
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I have started the run as per your suggestions. Few more information is that my problem is 2D axisymmetric, containing triangles and quad cells.
Thanks |
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March 9, 2006, 08:03
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Re: cavitation in fluent
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#4 |
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Guest
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try anyway
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March 9, 2006, 23:53
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Re: cavitation in fluent
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#5 |
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Guest
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No way it is converging. Moreover it is giving me very absurd results. I have mass flow rate BC at inlet and there are two outlets with atm pressure. The flow passes through small gap of 0.1mm gap. It is incompressible flow, with fluid in liquid state.
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March 10, 2006, 01:54
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Re: cavitation in fluent
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#6 |
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Guest
Posts: n/a
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switch on velocity inlet instead of massflow inlet. Befor you enable the mixture model (cavitation), initialize your domain with a well converged steady solutions. Then enable cavitation, and run it.
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March 10, 2006, 05:37
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Re: cavitation in fluent
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#7 |
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Guest
Posts: n/a
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i have do this job many times, we could talk about it on MSN。the cavitation model is difficulty to converge
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March 10, 2006, 05:40
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Re: cavitation in fluent
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#8 |
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Guest
Posts: n/a
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my MSN:zeliumin110@yahoo.com.cn
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March 10, 2006, 07:45
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Re: cavitation in fluent
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#9 |
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Guest
Posts: n/a
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Thanks Max.
Thanks lius. Just curious, the id mentioned is MSN or yahoo? |
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March 10, 2006, 07:49
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Re: cavitation in fluent
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#10 |
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Guest
Posts: n/a
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I have tried some things suggested by Max in latest post. Earlier I was running cavitation with steady state. Once I switched to unsteady state, I am getting some logical results. Still vapor phase residual fluctuates a lot. Once I get adequate mass balance (which also fluctuates a lot), I will stop the computation for post processing.
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March 14, 2006, 07:33
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Re: cavitation in fluent
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#11 |
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Guest
Posts: n/a
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Hi!
If you´re interested I made some good simulations of cloud cavitation on a hydrofoil with fluent. An short example was also published in Fluent news (fall 2004 i think). If you want the whole paper (european journal of mechanics) sen me an email. by MATEUS |
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March 18, 2006, 09:28
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Re: cavitation in fluent
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#12 |
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Guest
Posts: n/a
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Hi,
can i have this papers for study. i am very interested on cavitation problem. thanking you, with regards san |
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March 20, 2006, 02:06
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Re: cavitation in fluent
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#13 |
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Guest
Posts: n/a
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No problem just send me an e-mail...
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March 29, 2006, 07:29
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Re: cavitation in fluent
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#14 |
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March 29, 2006, 07:35
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Re: cavitation in fluent
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#15 |
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