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March 22, 2011, 13:21 |
Accuracy problem
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#1 |
New Member
Ivan
Join Date: Sep 2010
Location: Russia , Moscow.
Posts: 14
Rep Power: 15 |
Hello everyone ! I have a quite strange problem with solving of two equations:
Code:
fvVectorMatrix uEqn ( fvm::ddt(U) == (fvc::div(sigma) - fvc::grad(p))/rho ); uEqn.solve() ; pU = p*U ; fvScalarMatrix EEqn ( fvm::ddt(E) == -fvc::div(pU)/rho ); EEqn.solve() ; Code:
gap { field p; expression "2e05"; condition "(pos().x)<=(pi)"; keepPatches 1; } Here 1st 100 values of E : Code:
215250 215250 215250 215249.999999999971 215250 215250 215250 215249.999999999971 215250 215249.999999999971 215250 215250 215250 215249.999999999971 215250.000000000029 215250 215250 215250 215249.999999999971 215249.999999999971 215249.999999999971 215250 215249.999999999971 215250 215250 215250 215250 215250 215249.999999999971 215250.000000000029 215249.999999999971 215250 215250 215249.999999999971 215249.999999999971 215249.999999999971 215249.999999999971 215249.999999999971 215249.999999999971 215249.999999999971 215250 215250 215250 215249.999999999971 215250 215250 215249.999999999971 215250 215249.999999999971 215250 215250 215249.999999999971 215249.999999999971 215250 215250 215249.999999999971 215249.999999999971 215249.999999999971 215249.999999999971 215249.999999999971 215249.999999999971 215249.999999999971 215250 215249.999999999971 215250 215249.999999999971 215249.999999999971 215249.999999999971 215249.999999999971 215249.999999999971 215250 215250 215250 215250 215249.999999999971 215249.999999999971 215250 215250 215250 215250 215249.999999999971 215250 215250 215249.999999999971 215249.999999999971 215250 215250 215250 215250 215249.999999999971 215249.999999999971 215250 215250 215250 215250 215249.999999999971 215250 215250 215249.999999999971 215250 215249.999999999971 |
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