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February 9, 2014, 07:44 |
Problem to solve ddt(U)+laplacian(nu,U)=f
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#1 |
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Join Date: Feb 2012
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I'm going to solve the below equation where U is the velocity field and f is a volume vector field with the dimension of m/s^2.
fvVectorMatrix UEqn fvm::ddt(U)- fvm::laplacian(nu, U)+f By using a solver like 'PBiCG' i get the error that i need a symmetric matrix solver. After choosing a symmetric solver, i get the error that : keyword agglomerator is undefined in dictionary From function dictionary::lookupEntry(const word&, bool, bool) const in file db/dictionary/dictionary.C at line 402. And when i use an implicit approach ( fvm::Sp(1,f) ) instead of 'f' , i get another error about incompatibility of f and U. I would appreciate if somebody can tell what is wrong here. |
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February 10, 2014, 03:35 |
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#2 |
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Anton Kidess
Join Date: May 2009
Location: Germany
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You didn't choose 'a' symmetric solver as in an arbitrary one, but specifically GAMG, right? And then you get the error "keyword agglomerator is undefined in dictionary". May I suggest adding that keyword to your solution dictionary?
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February 10, 2014, 06:14 |
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#3 | |
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Join Date: Feb 2012
Posts: 49
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Quote:
Always i thought there is a problem in my code,So not concentrated on somewhere else! Thanks. |
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