# 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.Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content.

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