Mass flow rate

Mass flow rate is the movement of mass per time. Its unit is mass divided by time - kilogram per second in SI units, and slug per second or pound per second in US customary units.

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Mass flow rate can be calculated from the density of the liquid (or gas), its velocity, and the cross sectional area of flow.

=

where:

= mass flow rate

ρ = density

V = velocity

A = flow area

The mass flow rate can also be calculated by multiplying the volume flow rate by the density.

=

where:

ρ = density

Q = volume flow rate

See also

• Mass flow meter
• Theory of Operation: Thermal Mass Flow Meters
• Volume flow rate
• Mass flux
• Fluid dynamics
• Orifice plate
• Mass flow controller