For a binary mixture of species A and B, the mass average velocity is defined as
(a) 2 pa Va + pb Vb/ p
(b) pa Va + pb Vb/ p
(c) pa Va + 2 pb Vb/ p
(d) pa Va + pb Vb/ 2 p
The question was posed to me in an online interview.
Question is taken from Concentrations, Velocities and Fluxes in portion Modes and Diffusion of Mass Transfer