gradient component

johndeas · December 12, 2010, 15:03

Hi,

This is a very simple question. Can you confirm to me that grad(U).component(tensor::YZ) returns dV/dZ ? Although it seems logical, it is not that clear from the 1.6 programmer guide.

Regards,

John

ehsan · August 4, 2016, 01:06

Hello,
May I ask you whether is it correct to code the below formula in OF
as:
Gij=(sqr(delta_X())*fvc::grad(U).component(tensor: :XX)*fvc::grad(U).component(tensor::YX))+(sqr(delt a_Y())*fvc::grad(U).component(tensor::XY)*fvc::gra d(U).component(tensor::YY))+(sqr(delta_Z())*fvc::g rad(U).component(tensor::XZ)*fvc::grad(U).componen t(tensor::YZ))
Best Regards
Ehsan

December 12, 2010, 15:03	gradient component	#1
johndeas Senior Member John Deas Join Date: Mar 2009 Posts: 160 Rep Power: 17	Hi, This is a very simple question. Can you confirm to me that grad(U).component(tensor::YZ) returns dV/dZ ? Although it seems logical, it is not that clear from the 1.6 programmer guide. Regards, John Last edited by johndeas; December 13, 2010 at 18:20.

August 4, 2016, 01:06	Formula in OF	#2
ehsan Senior Member Ehsan Join Date: Mar 2009 Posts: 112 Rep Power: 17	Hello, May I ask you whether is it correct to code the below formula in OF as: Gij=(sqr(delta_X())fvc::grad(U).component(tensor: :XX)fvc::grad(U).component(tensor::YX))+(sqr(delt a_Y())fvc::grad(U).component(tensor::XY)fvc::gra d(U).component(tensor::YY))+(sqr(delta_Z())fvc::g rad(U).component(tensor::XZ)fvc::grad(U).componen t(tensor::YZ)) Best Regards Ehsan

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