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Improvement of round-off error handling

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This commit is contained in:
Hrvoje Jasak 2011-10-06 14:40:34 +01:00
parent 3fd4fb3793
commit 4d9ab22fbe
1 changed files with 5 additions and 2 deletions
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7
src/finiteVolume/cfdTools/general/include/checkVolContinuity.H
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@ -8,10 +8,13 @@ if (mesh.moving())
scalar sumV = gSum(V); scalar sumV = gSum(V);
scalar sumV0 = gSum(V0); scalar sumV0 = gSum(V0);
scalarField volChange = (1.0 - V0/V)/dt; // Rewrite of mesh motion check based on round-off error problems
// Note precision around V and avoiding division with dt
// HJ, 4/Oct/2011
scalarField volChange = (V - V0)/V;
scalarField divFlux = scalarField divFlux =
- fvc::div(mesh.phi())().internalField(); - fvc::div(mesh.phi())().internalField()*dt;
scalarField conserve = volChange + divFlux; scalarField conserve = volChange + divFlux;