hi in FLUENT there are lot of option for combustion analysis like premixed, non premixed, partialy premixed and even spray option. but how can i analyze single droplet combustion using FLUENT, is there any previous work on this thanks in advance

Of course. Fluent built-in vaporization/combustion models, or make your own with UDFs.

ok baskar,

try to use discrete phase model non premixed + prepdf + injection ( see liquid fuel combustion on the fluent 5.4 tutorial)

regards