CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   FLUENT (http://www.cfd-online.com/Forums/fluent/)
-   -   gradient of species mass fraction (http://www.cfd-online.com/Forums/fluent/33158-gradient-species-mass-fraction.html)

zhou March 3, 2004 23:55

gradient of species mass fraction
 
I got a question. I am trying to calculate gradient of species mass fraction using macro "C_YI_G" in Fluent. However, the value of "C_YI_G" is either zero or not reaonable. I have checked the value of species mass fraction "C_YI" and it is reasonable. So i change to another way to calculate gradient of species mass fraction. First, i transfer value of species mass fraction to a User Defined Scalar (UDS) and then i calculate the gradient of this UDS by macro "C_UDSI_G". Then the gradient result is reasonable. Do you know what is the problem with gradient of species mass fracion "C_YI_G"? Thank you in advance.


All times are GMT -4. The time now is 06:10.