In physics and engineering, mass flux is the rate of mass flow per unit of area. Its SI units are kg ⋅ s−1 ⋅ m−2. The common symbols are j, J, q, Q, φ, or Φ (Greek lowercase or capital Phi), sometimes with subscript m to indicate mass is the flowing quantity.
This flux quantity is also known simply as "mass flow".[1] "Mass flux" can also refer to an alternate form of flux in Fick's law that includes the molecular mass, or in Darcy's law that includes the mass density.[2] Less commonly the defining equation for mass flux in this article is used interchangeably with the defining equation in mass flow rate.[a]
- ^ "ISO 80000-4:2019 Quantities and units - Part 4: Mechanics". ISO. Retrieved 2024-10-02.
- ^ "Thesaurus: Mass flux". Retrieved 2008-12-24.[permanent dead link]
- ^ Fluid Mechanics, M. Potter, D.C. Wiggart, Schuam's outlines, McGraw Hill (USA), 2008, ISBN 978-0-07-148781-8
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