Injection point dpm
 

I'm doing FLUENT study, the combination of DPM and Finite rate in density based solver. Where should I put the dust concentration in my injection point? Before this, I convert the dust conc (g/m3) to kg/s since the the injection point need the total mass flow rate (kg/s). Is it right? What should I do or how should I put the dust concentration without converting. Does boundary condition effect the input data?.Really need the best recommendation. Please help...thanks.