Has anyone tried implementing snGradCorrection? I tried to modify wallGradU by replacing snGrad with snGradCorrection and its simply throwing up.
Doesn't wallGradU calculate the NORMAL gradient of wall? Does the gradient of a scalar direction necessarily has to be along normal?
What is the difference between
1. U.boundaryField()[patchi].snGrad() and
2. Calculating gradient of U and then inner product of gradU and the surface normal
I am trying to build expression for 2., but getting errors.
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