x_{1} is the vector flux (flow) of quantity/substance (count) x_{2} through (geometric/imaginary) hypersurface/embedded manifold x_{3} per unit hyperarea per unit time.

This is the transport phenomena sense of "flux": a density of flow, the maximal rate of flow of a subsramce or quantity (x_{2}) through a differential hypersurface. If the hypersurface x_{3} is n-dimensional spatially and the dimensionality (units) of x_{2} is U, then the dimensionality (units) of x_{1} is U/(1 m^{n} * s). Fairly similar to nildenmi. For the hypersurface integral of this quantity (with respect to the normal), use: flaumji. See also: flecu.

- flaumji
- x
_{1}is the scalar flux (total flow) of quantity/substance x_{2}through bounding Jordan orientable manifold x_{3}under conditions and conventions of definition x_{4}(including actual orientation of x_{3}, signum of outflux, etc.)