. . . . . . . . . . "In Physics and Engineering, mass flux is the rate of mass flow per unit area. The common symbols are \\(j\\), \\(J\\), \\(\\phi\\), or \\(\\Phi\\) (Greek lower or capital Phi), sometimes with subscript \\(m\\) to indicate mass is the flowing quantity. Its SI units are \\( kg s^{-1} m^{-2}\\)."^^ . "\\(j_m = \\lim\\limits_{A \\rightarrow 0}\\frac{I_m}{A}\\)"^^ . . "http://en.wikipedia.org/wiki/Mass_flux"^^ . . . "Mass per Area Time"@en . .