# equation of continuity

## equation of continuity

[i′kwā·zhən əv ‚känt·ən′ü·əd·ē]
(physics)

## equation of continuity The equation of continuity states that (a) air mass flow is constant, as mass can neither be created nor destroyed, and (b) the product of a cross-sectional area (A), velocity (V), and density (ρ) is constant (K), or AVρ = K. It assumes that because pressure changes are small, they have little effect on density and, therefore, AV= K or V= K/A. Hence, a reduced cross section gives a greater velocity.
References in periodicals archive ?
Assuming the vortex seepage flow and distribution of the resistance element evenly over the section we will use the generalized Darcy law and equation of continuity.
The following are the equation of continuity and the equation of energy, respectively:
According to the above assumptions, the blood flow dynamics is governed by the equation of continuity
It should be pointed out that the characteristic of inlet flow varies with time; therefore unsteady state equation of continuity for zinc in the contactor should be solved to obtain this parameter.
Using these expressions for the scalar potential  and vector potential  together with Ohm's law  and the equation of continuity , we arrive at the following new equations:
But equation of continuity for steady and ideal flow is From equations (1) and (2), we get .
For mathematical formulation Darcy's law, equation of continuity, the standard relations of saturations, pressures, permeability of injected liquid and native liquids are considered.
The equations for the flow inside the drops are given by the equation of continuity for an incompressible fluid and the Navier-Stokes equation within the quasistatic approximation, so that
In view of the equation of continuity we introduce the stream function [psi] as
while the imaginary part is the equation of continuity [partial derivative]P/[partial derivative]t + + div(PV) = 0.
Heat transfer in the gas phase is generally by convection, and can be described by the equation of continuity, motion, and energy.

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