CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   Main CFD Forum (http://www.cfd-online.com/Forums/main/)
-   -   LES combustion problem (http://www.cfd-online.com/Forums/main/6503-les-combustion-problem.html)

Salvador August 28, 2003 09:52

LES combustion problem
 
I am modelling non-premixed turbulent flames using LES. I am systematically obtaining a much smaller jet penetration than experiments or RANS solutions. I even obtained it starting from a "correct" k-e solution. I have tried several combustion models and the problems persist. (it also happens when I test a pure mixing case with a prescribed density distribution in mixture fraction space) I think is related to the relatively coarse grid used that introduced a lot of numerical diffusion. However, some people suggest me that incorrect incoming turbulent BC can be the cause. Any ideas/suggestions around there?


All times are GMT -4. The time now is 00:06.