grid independency test
 

hii..
i am doing diesel engine closed simulation by using AVL FIRE. For the grid independency test purpose,i have taken different average cell size with different number of cells for the same problem. after running some simulation with different cell size. i am getting similar results for some properties(such as pressure, temperature etc..) bt for the same case am getting different values for some other properties.
so please suggest me the important aspects and care we should have to take before a grid independence test in AVL fire ESE diesel simulator.
thanking you all
Abdul gafoor

Dear Abdul,
Typically the output parameters to be considered for the grid independance are emission parameters, especially NOx. Vary the number of cells and see what is the effect in the predicted NOx

Regards
RD

thanks sir.....thanks for reply.....after running some solutions i am getting variation in soot values....NO values are matching....so what we can do with this....can i take that setup as a grid independence setup....?