Is div(grad(U))=laplacian(U) ??? - Page 2 -- CFD Online Discussion Forums

October 4, 2012, 08:00	Is div(grad(U))=laplacian(U) ???	#1
mmkr825 Member M Mallikarjuna Reddy Join Date: Jul 2012 Posts: 91 Rep Power: 13	Hi Everyone, I have a doubt about div() and laplacian(). For the general case in all solvers we written gammadiv(grad(U))=laplacian(gamma, U). But when i checked by replacing fvc::laplacian(gamma, U)* =*gammafvc::div(fvc::grad(U))** for the icoFoam solver, the solution is diverging (Courant Number going to high value). Anyone please clarify my doubt. Thanks Regards Mallikarjuna

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