Mass flux, also known as mass flow flux or mass transfer flux, is a measure of the amount of mass passing through a unit area per unit of time. It is used to describe the rate at which mass is transferred across a specified surface or interface.
- mass flux is the mass flow rate per unit area (measured in kg/(m²·s)
- ṁ is the mass flow rate (measured in kg/s or other mass units per unit time)
- A is the cross-sectional area through which the mass flow is occurring (measured in m²)