Momentum flux
Momentum flux, the rate of transfer of momentum across a unit area (N·s·m-2·s-1). (Newtonian fluid, viscous flow)
Heat flux, the rate of heat flow across a unit area (J·m-2·s-1). (Fourier's Law) [5] (This definition of heat flux fits Maxwell's original definition[4].)
Chemical flux, the rate of movement of molecules across a unit area (mol·m-2·s-1). (Fick's law of diffusion)
Volumetric flux, the rate of volume flow across a unit area (m3·m-2·s-1). (Darcy's law)
Mass flux, the rate of mass flow across a unit area (kg·m-2·s-1). (Either an alternate form of Fick's law that includes the molecular mass, or an alternate form of Darcy's law that includes the density)
Heat flux, the rate of heat flow across a unit area (J·m-2·s-1). (Fourier's Law) [5] (This definition of heat flux fits Maxwell's original definition[4].)
Chemical flux, the rate of movement of molecules across a unit area (mol·m-2·s-1). (Fick's law of diffusion)
Volumetric flux, the rate of volume flow across a unit area (m3·m-2·s-1). (Darcy's law)
Mass flux, the rate of mass flow across a unit area (kg·m-2·s-1). (Either an alternate form of Fick's law that includes the molecular mass, or an alternate form of Darcy's law that includes the density)
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