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implement a diffusion term in the source

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Old   April 22, 2012, 02:55
Default implement a diffusion term in the source
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I want to implement the diffusion of a scalar \nabla\bullet(\nabla\Phi) in the source term , my ideal is use another scalar in DEFINE_ADUST, then get the gradient of the scalar by C_UDSI_G in the DEFINE_SOURCE finally use NV_DOT(C_UDSI_G,A);
can that be possible? has anybody done it before ?
any suggestion is appreciate !
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