Question

what does the equation of continuity signify?​

Answer 1

In fluid dynamics, the continuity equation states that the rate at which mass enters a system is equal to the rate at which mass leaves the system plus the accumulation of mass within the system. ... ρ is fluid density, t is time, u is the flow velocity vector field.

Answer 2

The Navier–Stokes equations form a vector continuity equationdescribing the conservation of linear momentum. If the fluid is an incompressible flow (ρ is constant), the mass continuity equation simplifies to a volumecontinuity equation: which means that the divergence of velocity field is zero everywhere. hope it will help you
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