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
Solved Examples
Example 1
Determine the mass flow rate of a given fluid whose density is 800 kg/m3, velocity, and area of cross-section is 30 m/s and 20 cm2 respectively.
Solution:
Given values are,
ρ = 800 kg/m3
V = 30 m/s and
A = 20 cm2
= 0.20 m2
The mass flow rate formula is given by,
m = ρVA
m = 800 × 30 × 0.20
m = 4800 kg/s
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