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How to add a source term like this!!

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Old   February 11, 2011, 00:51
Default How to add a source term like this!!
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Arvind
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Hi dear fomers....i want to solve following equation-
ddt(Cp,T)-laplacian(K,T)=S0 where S0=Io*exp(-(x*x+y*y)) where S0 is a laser beam moving with 10 cm/s velocity.Now..i am stuck at how to model this source term??.
kindly give your valuable suggestions....

Thanks
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Old   February 11, 2011, 02:34
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Nima Sam
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is x the first array of position vector ?
if yes , you can access to position vector in cell center with mesh.C() and in cell face with mesh.Cf() so
volVectorField positionVector=mesh.C();
volScalarField x=positionVector.x();
volScalarField y=positionVector.y();
then source term would be
forAll (x,celli){
S0=(x[celli]*x[celli]+y[celli]*y[celli]);
}

i guess some things like above code can help you
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