Mass flow rate

Mass flow rate
Common symbols
SI unitkg/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 (, 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]

  1. ^ Fluid Mechanics, M. Potter, D. C. Wiggart, Schaum's Outlines, McGraw Hill (USA), 2008, ISBN 978-0-07-148781-8.
  2. ^ "ISO 80000-4:2019 Quantities and units – Part 4: Mechanics". ISO. Retrieved 2024-10-02.


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