Gradient calculation -- CFD Online Discussion Forums

October 20, 2008, 13:48	I define a volScalarField linP	#1
jens_klostermann Senior Member Jens Klostermann Join Date: Mar 2009 Posts: 117 Rep Power: 17	I define a volScalarField linP = gradP * (flowDirection & (mesh.C())) ,where gradP is a constant scalar and flowDirection a unitvector (both as in channelOodles) if I now check mag(fvc::grad(linP)) it is not equal gradP, why? Is there a way to improve this? Jens

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