The Mass Flow node specifies the mass flow through the boundary. The mass flow is given by the product of the normal velocity
vn and the density at the boundary
ρbnd. This results in a flux condition given by
Enter the Normal velocity vn (SI unit: m/s) and
Fluid density at the boundary ρbnd (SI unit: kg/m
3). The defaults are
cpf.vref and
cpf.rhoref, respectively. The values given in the
Reference Values.