flux, \(J_{\text{X}}\)

of a quantity

https://doi.org/10.1351/goldbook.F02461

Flow rate of X through a cross-section perpendicular to the flow divided by the cross-sectional area.

Sources:
Green Book, 2^nd ed., p. 65 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)
PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 974 (https://doi.org/10.1351/pac199668040957)