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ENH: edgeInterpolation: avoid division-by-zero errors in skew corrections

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This commit is contained in:
Kutalmis Bercin
2022-07-12 16:00:34 +01:00
parent c2cae92fc5
commit 9ccc2d8fd5
1 changed files with 19 additions and 6 deletions
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25
src/finiteArea/interpolation/edgeInterpolation/edgeInterpolation.C
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@ -6,7 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2016-2017 Wikki Ltd
Copyright (C) 2020 OpenCFD Ltd.
Copyright (C) 2020-2022 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -581,8 +581,15 @@ void Foam::edgeInterpolation::makeSkewCorrectionVectors() const
const vector& S = points[edges[edgeI].start()];
vector e = edges[edgeI].vec(points);
scalar alpha =
-(((N - P)^(S - P))&((N - P)^e ))/(((N - P)^e)&((N - P)^e));
const scalar beta = magSqr((N - P)^e);
if (beta < ROOTVSMALL)
{
// Too small - skew correction remains zero
continue;
}
const scalar alpha = -(((N - P)^(S - P))&((N - P)^e))/beta;
vector E(S + alpha*e);
@ -614,9 +621,15 @@ void Foam::edgeInterpolation::makeSkewCorrectionVectors() const
const vector& S = points[patchEdges[edgeI].start()];
vector e = patchEdges[edgeI].vec(points);
scalar alpha =
- (((N - P)^(S - P))&((N - P)^e))
/(((N - P)^e)&((N - P)^e));
const scalar beta = magSqr((N - P)^e);
if (beta < ROOTVSMALL)
{
// Too small - skew correction remains zero
continue;
}
const scalar alpha = -(((N - P)^(S - P))&((N - P)^e))/beta;
vector E(S + alpha*e);