Mass flux

It has been suggested that this article or section be merged with mass flow (Discuss)

Mass flux (Φ) is the rate of mass flow across a unit area (kg·m-2·s-1) (either as an alternate form of Fick's law that includes the molecular mass, or an alternate form of Darcy's law that includes the density). The mass flux across a surface A is the total mass of particles which move across A per unit time (a direction n is defined across the surface, and any particles which cross A in the opposite direction to this counted as negative).^[1]

Mass flux in waste removal

The contaminant mass flux or mass discharge emanating from a source zone, also referred to as the source strength or source function, is a primary determinant of the risk associated with hazardous waste sites. Concomitantly, the reduction in mass flux achieved with a specific level of source-zone mass removal (or mass depletion) is a key metric for evaluating the effectiveness of a source-zone remediation effort. Thus, there is great interest in characterizing, estimating, and predicting relationships between mass flux reduction and mass removal.^[2] By quantifying mass flux and perhaps spatial integration to obtain mass loads, then site-wide considerations of mass balances can be made.^[3]

See also

• Flux
• Fick's law
• Darcy's law
• Wave mass flux and wave momentum

References