Help on 2nd central differentiation in oepnfoam -- CFD Online Discussion Forums

July 31, 2018, 03:08	Help on 2nd central differentiation in oepnfoam	#1
ndtrong Senior Member Nguyen Duy Trong Join Date: Apr 2014 Posts: 124 Rep Power: 12	Hi everyone, I want to compute 2nd central differentiation by using formula as below: ddx(phi_(ijk)) = (phi_(i-1,j,k) - 2*phi_(i,j,k) + phi_(i+1,j,k))/dx^2 with phi is volScalarFields in openfoam. Could any one please help me to do that? Thanks

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