[varunkuamr]

hi i am looking for help in modelling an automotive exhaust radiation characteristics.
i am a beginer in CFD and tried few basic problems available online.
can anyone guide me to how to start of.... as i refer to blogs some refer not to use any of the radiation models since it is for external radiationbut in some references i find DO model being used.
i tried both the steps and am not sure which one is the corect solution as radiation is not being shown in domain which i have created arround my geometry.... any one who can guide me through will do a great help

thanks in advance