The Volumetric Discharge refers to the ratio of the total volume of the flow to the time. It is also known as the discharge.

Discharge = Volume / Time

Relation between Volumetric and Mass Discharge

Discharge = Volume / Time

Now,

Volume = Mass / Density

Therefore,

Discharge = Mass / (Density x Time )

Mass Flow rate = Mass/Time

There fore volumetric flow rate = Mass Flow rate / Density