a96dcf706b
- replace the "one-size-fits-all" approach of tensor field inv() with individual 'failsafe' inverts. The inv() field function historically just checked the first entry to detect 2D cases and adjusted/readjusted *all* tensors accordingly (to avoid singularity tensors and/or noisy inversions). This seems to have worked reasonably well with 3D volume meshes, but breaks down for 2D area meshes, which can be axis-aligned differently on different sections of the mesh.
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | www.openfoam.com
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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Copyright (C) 2023 OpenCFD Ltd.
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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Application
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Test-invTensor
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Description
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Tests for regular and corner cases of tensor inversion.
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\*---------------------------------------------------------------------------*/
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#include "tensor.H"
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#include "symmTensor.H"
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#include "transform.H"
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#include "unitConversion.H"
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#include "Random.H"
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#include "scalar.H"
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#include "complex.H"
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#include "sigFpe.H"
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using namespace Foam;
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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template<class TensorType>
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void test_invert(const TensorType& tt)
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{
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Info<< pTraits<TensorType>::typeName << nl
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<< "ten : " << tt << nl;
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// Non-failsafe. try/catch does not work here
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if (tt.det() < ROOTVSMALL)
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{
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Info<< "inv : " << "nan/inf" << nl;
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}
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else
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{
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Info<< "inv : " << tt.inv() << nl;
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}
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// Failsafe
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Info<< "inv : " << tt.safeInv() << nl;
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Info<< nl;
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}
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// * * * * * * * * * * * * * * * Main Program * * * * * * * * * * * * * * * //
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int main(int argc, char *argv[])
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{
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// Run with FOAM_SIGFPE=true to ensure we see divide by zero
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Foam::sigFpe::set(true);
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{
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symmTensor st(1e-3, 0, 0, 1e-3, 0, 1e-6);
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test_invert(st);
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}
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{
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symmTensor st(1e-3, 0, 0, 1e-3, 0, 1e-30);
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test_invert(st);
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}
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{
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symmTensor st(1e-3, 0, 0, 1e-3, 0, 0);
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test_invert(st);
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}
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return 0;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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