System of Units

MFIX-Exa adopts the International System of Units (SI). Simulations have to be set up accordingly. In the following table we provide a list of some of the physical quantities we can specify in the input file and their correspondent units.

Physical quantity	MFIX-Exa SI unit
amount of substance	mole [ $m o l$ ]
length	meter [ $m$ ]
mass	kilogram [ $k g$ ]
time	second [ $s$ ]
force	Newton [ $N$ ]
temperature	Kelvin [ $K$ ]
pressure	Pascal [ $P a$ ]
energy	Joule [ $J$ ]
power	Watt [ $W$ ]
density	[ $k g \cdot m^{- 3}$ ]
velocity	[ $m \cdot s^{- 1}$ ]
dynamic viscosity	[ $P a \cdot s$ ]
diffusivity	[ $m^{2} \cdot s^{- 1}$ ]
specific heat capacity	[ $J \cdot k g^{- 1} \cdot K^{- 1}$ ]
thermal conductivity	[ $W \cdot m^{- 1} \cdot K^{- 1}$ ]
spring coefficient	[ $N \cdot m^{- 1}$ ]
molecular weight	[ $k g \cdot m o l^{- 1}$ ]
heat of formation	[ $J \cdot k g^{- 1}$ ]
chemical reaction rate	[ $m o l \cdot m^{- 3} \cdot s^{- 1}$ ]