How to calculate divergence of a field in CFD-post

shafa_hn · December 22, 2017, 13:31

I want to calculate the conservation equation of Entropy field, in order to find the point of entropy generation (sources of entropy). In order to do that, I need calculate Divergence of entropy transportation field.

Is there any reasonable way to calculate divergence (generally, differentiation operation in vector field) of the field in CFD-Post and CCL/CEL? Is it possible, or it must be done in Solver phase by adding new variables?

I really appreciate your comments.

ghorrocks · December 22, 2017, 17:15

Have a look in the CFX reference guide for available CEL operations. For instance u.grad x gives you the x gradient of the u velocity field.

December 22, 2017, 13:31	How to calculate divergence of a field in CFD-post	#1
shafa_hn New Member Shafa HN Join Date: Sep 2017 Posts: 7 Rep Power: 8	I want to calculate the conservation equation of Entropy field, in order to find the point of entropy generation (sources of entropy). In order to do that, I need calculate Divergence of entropy transportation field. Is there any reasonable way to calculate divergence (generally, differentiation operation in vector field) of the field in CFD-Post and CCL/CEL? Is it possible, or it must be done in Solver phase by adding new variables? I really appreciate your comments.

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December 22, 2017, 17:15		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,781 Rep Power: 143	Have a look in the CFX reference guide for available CEL operations. For instance u.grad x gives you the x gradient of the u velocity field.