how to write some terms in ***.C file
 

Hi Dear all
I try to develop simpleFoam solver by adding new equations to it, new equations have the following terms :


1. nabla . [D nabla F + (C/ T) nabla T]
2. K [ D nabla F . nabla T + (D/T) nabla T . nabla T ]

D,C and K are constant.

I don't know how should I write these terms in newSimpleFoam.c and also for each term fvm is better or fvc.

(a correct mathematic presentation of above terms is attached)

your help is appreciated.
Thanks.

Arjang

I recommend having a look at the following:

https://dl.dropboxusercontent.com/u/...20tutorial.pdf

http://www.cfd-online.com/Forums/ope...equations.html

http://www.cfd-online.com/Forums/ope...tml#post411753

There is a lot more information in this forum about modifying the default solvers, simpleFoam in particular.

thanks for your answer Dear Artur. but I want to know how should I write these terms to achieve
better convergence.

I think firstly I should make a linearization of terms nablaT.nablaT and nablaF.nablaF , if that's true which CFD books can help me?

Does any body have any tip for me?