principle of persistence of irrotational flow

principle of persistence of circulation

Zorawski theorem on persistence of circulation

irrotational motion of a fluid

irrotational region

irrotational velocity field

away-from-home manning principle

operating principle

quantity-distance principle

territorial principle

principle of collective responsibility

principle of defense sufficiency

principle of solidarity

principle of subsidiarity

principle of territorial integrity

fire-out-of-battery principle

blowback principle

Archimedes principle

generalized Archimedes principle

principle of conservation of mass

principle of conservation of momentum

principle of energy equipartition

principle of solidification

Stevin principle

swinging gate principle

simplicity principle of war

pooling principle

air traffic flow management (ATFM)

air-flow indicator

axial-flow (jet) engine

axial-flow turboshaft engine

flow meter

flow point