Contents Chapter 14: Multiphase Flows | 14.4. Mixture Model Theory | Print page 14.4.3. Continuity EquationThe continuity equation for the mixture is(14–119)where is the mass-averaged velocity:(14–120)and is the mixture density:(14–121) is the volume fraction of phase . « 14.4.2. Limitations of the Mixture Model 14.4.4. Momentum Equation »