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- - **Problem with source term in the calculation domain**
(*https://www.cfd-online.com/Forums/openfoam-solving/60412-problem-source-term-calculation-domain.html*)

Hello everybody
I want to pHello everybody
I want to put a source term in the calculation domain of a variable V at x=0,25mm and for variation of 3mm on the y axis. I have written the equation resolution of this scalar as this: tmp<fvscalarmatrix> VEqn ( fvm::laplacian(sigma, V) ); const vectorField& centres = ; forAll(centres, cellI) { if ((centres[cellI].x() == 0.250e-03) && (centres[cellI].y() <= 3.000e-03)) { solve(VEqn() == 1.200e08*exp(-2.080e03*centres[cellI].y())/0.250e-03); } else { VEqn().solve(); } } Veqn().relax(); But I have two questions: 1) is the geometric position of a cell is represented by (mesh.C()[cellI].x(), mesh.C()[cellI].y(), mesh.C()[cellI].z())? 2) I have an error concerning the exponential expression during compiling. This error is: VEqn.H:14: error: call of overloaded 'exp(const double&)' is ambiguous /usr/include/bits/mathcalls.h:101: note: candidates are: double exp(double) /home/fvm/OpenFOAM/OpenFOAM-1.2/src/OpenFOAM/lnInclude/dimensionedScalar.H:70: note: Foam::dimensionedScalar Foam::exp(const Foam::dimensionedScalar&) I thought the problem was with centres[cellI].y() declaration... but when I only use exp(-2.080e03) the error also occurs. So I think I have not well written the exponential expression in my program... I think it's a stupid question but it seems like I've forgotten something!!! Thank you for your comments or your help. Fred |

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