49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
//- write force displacement to file
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label leftPatchID = mesh.boundaryMesh().findPatchID("leftClamp");
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if(leftPatchID == -1)
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{
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FatalError << "Cannot find patch left for calculating force" << endl;
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}
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//- calculate force in x direction on leftClamp patch
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scalar leftForce = gSum
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(
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vector(1, 0, 0)
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& (mesh.boundary()[leftPatchID].Sf() & sigma.boundaryField()[leftPatchID])
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);
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//- patchIntegrate utility integrates it this way but this is worng because the sigma tensor should
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//- be dotted with the surface normal to give the actual traction/force
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//- you cannot just take the component of the sigma tensor
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//scalar leftForcePatchIntegrateMethod = gSum(
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// mesh.magSf().boundaryField()[leftPatchID]
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// *sigma.boundaryField()[leftPatchID].component(symmTensor::XY)
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// );
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vector gaugeU1 = vector::zero;
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vector gaugeU2 = vector::zero;
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if(gaugeFaceID1 != -1)
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{
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gaugeU1 = U.boundaryField()[gaugeFacePatchID1][gaugeFaceID1];
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}
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if(gaugeFaceID2 != -1)
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{
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gaugeU2 = U.boundaryField()[gaugeFacePatchID2][gaugeFaceID2];
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}
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//- reduce across procs
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reduce(gaugeU1, sumOp<vector>());
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reduce(gaugeU2, sumOp<vector>());
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Pout << "gaugeU1 is " << gaugeU1 << nl
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<< "gaugeU2 is " << gaugeU2 << endl;
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scalar gaugeDisp = mag(gaugeU1 - gaugeU2);
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//- write to file
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if(Pstream::master())
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{
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OFstream& forceDispFile = *filePtr;
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forceDispFile << 1000*gaugeDisp << "\t" << -1*leftForce << endl;
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}
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