How to evalute Sherwood number in CFD-Post?

kbaker · January 7, 2020, 03:05

Hello
I have a double diffusion (Heat and Mass transfer) problem within a cavity utilizing air+H2O vapor. I am trying to evaluate Sherood number in CFD post from the relation shown in the image. I need to evaluate the concentration derivative then integrate it to obtain the number but really I do not know how to do that? knowing that X and Z are non-dimensional coordinates? any suggestions please?

Regards,

Khalid

ghorrocks · January 7, 2020, 14:37

Have a look in the CFX reference manual. It describes the CEL expressions available, and there are both derivative/gradient functions and integration functions. You might be able to use these functions to make your function.

kbaker · January 8, 2020, 16:03

Thanks Glen for the reply. Unfortunately, I do not use CFX I used Fluent? do you think I can find derivative/gradient in CFD-post because as I saw it contain CEL expressions too but do not know where to find the derivative term?

Khalid

ghorrocks · January 8, 2020, 16:31

I don't know if CFD-Post can calculate gradients from Fluent files. Try it and find out. You will have to read the CFX Reference manual for the syntax on the gradients.

January 7, 2020, 14:37		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,711 Rep Power: 143	Have a look in the CFX reference manual. It describes the CEL expressions available, and there are both derivative/gradient functions and integration functions. You might be able to use these functions to make your function. kbaker likes this. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

January 8, 2020, 16:31		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,711 Rep Power: 143	I don't know if CFD-Post can calculate gradients from Fluent files. Try it and find out. You will have to read the CFX Reference manual for the syntax on the gradients. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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January 8, 2020, 16:03		#3
kbaker Senior Member Khalid Baker Join Date: Mar 2009 Location: IRAQ Posts: 168 Rep Power: 17	Thanks Glen for the reply. Unfortunately, I do not use CFX I used Fluent? do you think I can find derivative/gradient in CFD-post because as I saw it contain CEL expressions too but do not know where to find the derivative term? Khalid