fluxesquantities
Fluxesquantities is a coined term used to describe the broad class of physical quantities that quantify the transport of a property through a boundary. The concept emphasizes the distinction between a local field (such as a vector field representing a flow) and the global amount that crosses a surface per unit time. In practice, fluxesquantities encompass both flux densities (per unit area) and total flux across a surface, depending on the specific field and context.
Mathematically, for a vector field F defined over a surface S with outward normal n, the flux
Units and measurement of fluxesquantities are field-dependent. For example, heat flux density is measured in W/m^2,
Applications include sensor design, computational modeling, and the analysis of transport phenomena in engineering and physics.