Amount of fluid mass passing through a unit area per unit time:

LaTeX Math Block

alignment	left

j_m = \frac{\delta m}{ \delta A \, \delta t}

where

LaTeX Math Inline

body	\delta m

the amount of mass passed through the area

LaTeX Math Inline

body	\delta A

during the time

LaTeX Math Inline

body	\delta t

SI unit	Metric unit	Oilfield units
kg / ( s · m²)	kg / ( s · m²)	lb / (s · ft²)

Mass Flux vector is proportional to fluid density

LaTeX Math Inline

body	\rho

and fluid velocity

LaTeX Math Inline

body	\bf u

:

LaTeX Math Block

anchor	jm_vector
alignment	left

{\bf j}_m = \rho \, {\bf u}

Page tree

Versions Compared