CO in fluent - Simple basic doubt plz help.
 

I am simulating simple underground car park ventilation system. I assigned the velocity inlet boundary condition to the rectangle surface near to car and i have given CO species as 1. if the simulation runs for 300s with the velocity of 5m/s then what is the input of CO interms of PPM?

through rhoxAxV i can calculate the mass flow rate and how to convert the same to ppm

Thanks in advance