CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   Main CFD Forum (http://www.cfd-online.com/Forums/main/)
-   -   RANS modelling of turbulent non-premixed flames (http://www.cfd-online.com/Forums/main/10329-rans-modelling-turbulent-non-premixed-flames.html)

Bhargav November 21, 2005 13:34

RANS modelling of turbulent non-premixed flames
 
Hi, Am trying to model an axi-symmetric turbulent jet diffusion flame using the standard k-epsilon model, and closure provided by the steady laminar flamelet model through the densities. To match the axial evolution of velocity with the experiment, I had to increase the constant C_eps1 in the epsilon equation. By doing this, I got the correct decay of the axial velocity and mixture fraction. But, my variance of mixture fraction was severely underpredicted. The original constant predicted a faster decay of the axial velocity and mixture fraction, but, also resulted in the correct prediction of peak value for the variance. If anybody has come across a similar situation please send in your comments. Regards Bhargav


All times are GMT -4. The time now is 20:39.