34 lines
783 B
C++
34 lines
783 B
C++
// aitken acceleration
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if(iCorr == 0)
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{
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aitkenInitialRes = gMax(mag(DU.internalField()));
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}
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aitkenDelta.storePrevIter();
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// update delta
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aitkenDelta = (DU - DU.prevIter()) / aitkenInitialRes;
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// update relaxation factor
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if(iCorr == 0)
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{
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aitkenTheta = 0.1;
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}
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else
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{
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vectorField b = aitkenDelta.internalField() - aitkenDelta.prevIter().internalField();
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//scalar sumMagB = gSum(mag(b));
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scalar sumMagB = gSum(magSqr(b));
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if(sumMagB < SMALL)
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{
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//Warning << "Aitken under-relaxation: denominator less then SMALL"
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// << endl;
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sumMagB += SMALL;
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}
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aitkenTheta = -aitkenTheta*
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gSum(aitkenDelta.prevIter().internalField() & b)/sumMagB;
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}
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// correction to the latest DU
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DU += aitkenTheta*aitkenDelta*aitkenInitialRes;
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