Is there a software that couples p and U?

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 October 4, 2012, 10:58 Is there a software that couples p and U? #1 Senior Member   Samuele Z Join Date: Oct 2009 Location: Mozzate - Co - Italy Posts: 490 Rep Power: 11 Hi all, I am facing an interesting problem and I can't get convergence. I think that the problem is in the numerical resolution. I would need a scheme that couples p and U. Is there such a scheme in OF? Thanks a lot, Samuele

 October 6, 2012, 06:52 #2 Senior Member     ata kamyabi Join Date: Aug 2009 Location: Kerman Posts: 322 Rep Power: 10 Hi Do you really mean scheme? or coupling algorithm?

 October 8, 2012, 04:22 #3 Senior Member   Samuele Z Join Date: Oct 2009 Location: Mozzate - Co - Italy Posts: 490 Rep Power: 11 Let's say coupling algorithm!

 October 8, 2012, 05:25 #4 Senior Member     ata kamyabi Join Date: Aug 2009 Location: Kerman Posts: 322 Rep Power: 10 Hi I am confused what really you want but there is SIMPLE, PISO and ... algorithms in OF.

 October 8, 2012, 05:27 #5 Senior Member   Samuele Z Join Date: Oct 2009 Location: Mozzate - Co - Italy Posts: 490 Rep Power: 11 Yes, I know. But AFAIK, both simple and piso solved the P field first and then the U field, is that correct. I know that in fluent there is a solver which solved the U and P field together at each iteration.

 October 8, 2012, 05:30 #6 Senior Member     ata kamyabi Join Date: Aug 2009 Location: Kerman Posts: 322 Rep Power: 10 Hi Now I understand you. Is your problem compressible or weakly compressible?

 October 8, 2012, 05:32 #7 Senior Member   Samuele Z Join Date: Oct 2009 Location: Mozzate - Co - Italy Posts: 490 Rep Power: 11 Ok. Sorry, I didn't explain the problem well. Anyway, my problem is compressible

 October 8, 2012, 05:38 #8 Senior Member     ata kamyabi Join Date: Aug 2009 Location: Kerman Posts: 322 Rep Power: 10 Oh! As I know unfortunately there is not such solver in OF.

 October 8, 2012, 06:12 #9 Senior Member   Samuele Z Join Date: Oct 2009 Location: Mozzate - Co - Italy Posts: 490 Rep Power: 11 And do you have any suggestion for a weak-compressible problem?

 October 9, 2012, 06:48 #10 Senior Member     ata kamyabi Join Date: Aug 2009 Location: Kerman Posts: 322 Rep Power: 10 Hi Not specific offer just using a compressible equation of state and setting Match number low to be weakly compressible.

 October 9, 2012, 07:21 #11 Senior Member     Anton Kidess Join Date: May 2009 Location: Delft, Netherlands Posts: 1,142 Rep Power: 20 OpenFOAM extend offers a block-coupled solution strategy. Unfortunately, that's all I know about it Google block-coupled-matrix... __________________ *On twitter @akidTwit *Spend as much time formulating your questions as you expect people to spend on their answer. *Join the OpenFOAM stackexchange Q&A site: http://area51.stackexchange.com/prop...oHPxcPqde7HtA2

 October 9, 2012, 10:32 #12 Senior Member   Samuele Z Join Date: Oct 2009 Location: Mozzate - Co - Italy Posts: 490 Rep Power: 11 Thanks. I'll google it as soon as possible. Samuele

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