The homogeneous model for momentum transport assumes:
 | (5–28) |
and is given by Equation 5–23 and the momentum equation:
 | (5–29) |
where:
 | (5–30) |
The following points should be noted:
The interphase transfer terms have all canceled out.
This is essentially a single phase transport equation, with variable density and viscosity.
The homogeneous continuity equation is the same as for full
multiphase, Equation 5–23, except
that 
is not phase specific.
The homogeneous volume conservation equation is the same as
for full multiphase, Equation 5–24, except that 
is not phase specific.