In physics and engineering, mass flow rate is the rate at which mass of a substance changes over time. Its unit is kilogram per second (kg/s) in SI units, and slug per second or pound per second in US customary units. … See more

In the elementary form of the continuity equation for mass, in hydrodynamics: $${\displaystyle \rho _{1}\mathbf {v} _{1}\cdot \mathbf {A} _{1}=\rho _{2}\mathbf {v} _{2}\cdot \mathbf {A} _{2}.}$$
In elementary classical mechanics, mass flow rate is … See more

Mass flow rate is defined by the limit $${\displaystyle {\dot {m}}=\lim _{\Delta t\to 0}{\frac {\Delta m}{\Delta t}}={\frac {dm}{dt}},}$$ i.e., the flow of mass m through a surface per unit time t.
The overdot on the m is Newton's notation for a See more

• Continuity equation
• Fluid dynamics
• Mass flow controller
• Mass flow meter
• Mass flux
• Orifice plate See more