Mass flow rate | |
---|---|
Common symbols | |
SI unit | kg/s |
Dimension |
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. The common symbol is (ṁ, pronounced "m-dot"), although sometimes μ (Greek lowercase mu) is used.
Sometimes, mass flow rate as defined here is termed "mass flux" or "mass current".[a] Confusingly, "mass flow" is also a term for mass flux, the rate of mass flow per unit of area.[2]
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