Describe the difference between the mass divergence form and

Describe the difference between the mass divergence form and the velocity divergence form of the continuity equation (shown below). What does each equation specifically state, and what do they physically describe? Please be technical with your definition. Mass Divergence Form Velocity Divergence Form

Solution

mass divergence form in which the local rate of change density while the velocity convergence form in which rate of change of density ic constant that is incompressible flow

in first equation drho/dt is local rate of change of density and rhoV is the divergence of mass flux while in 2 equation is incompressible flow