6. Mass Flow Rate
The mass flow rate is the mass of a liquid substance passing
per unit time. In other words, the mass flow rate is defined as
the rate of movement of liquid pass through a unit area. The
mass flow is directly dependent on the density, velocity of the
liquid, and area of cross-section. It is the movement of mass per
unit time. The mass flow is denoted by m and the units in kg/s.
Formula of Mass Flow Rate
The mass flow formula is given by,
m = ρVA
Where
ρ = density of fluid,
V = velocity of the liquid, and
A = area of cross-section
7. Conservation of Mass
“The law of conservation of mass for a differential control
volume requires that the net mass rate leaving the control
volume plus the rate of accumulation of mass with in the
control volume must equal zero. “
NOTE:
For steady flow,
Mass flow rate at inlet = Mass flow rate at outlet
