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-   -   Discretization of the Diffusion Term (http://www.cfd-online.com/Forums/cfx/21740-discretization-diffusion-term.html)

Rui October 24, 2005 12:43

Discretization of the Diffusion Term
 
Hi,

In CFX, the Diffusion term is evaluated at each integration point, ip, according to the documentation, as:
  • <font color="blue">( k * d_phi/d_x * Dn )@ip</font>

the derivative <font color="blue">d_phi/d_x</font> is approximated as:
  • <font color="blue">(d_phi/d_x)@ip = sum( (d_N(n)/d_x)@ip * phi(n) )</font>

But how is the diffusion coefficient <font color="blue">k</font> obtained at each integration point? Also with shape functions?

Thank you. Regards,

Rui



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