View your list of saved words. (You can log in using Facebook.)
Principle of fluid mechanics. Stated simply, what flows into a defined volume in a defined time, minus what flows out of that volume in that time, must accumulate in that volume. If the sign of the accumulation is negative, then the material in that volume is being depleted. The principle is a consequence of the law of conservation of mass. The behaviour of fluids in motion is fully described by this equation, plus a second equation, based on the second of Newton's laws of motion, and a third equation, based on the conservation of energy.
Variants of CONTINUITY PRINCIPLE
continuity principle or continuity equation
This entry comes from Encyclopædia Britannica Concise. For the full entry on continuity principle, visit Britannica.com.
Seen & Heard
What made you look up continuity principle? Please tell us what you were reading, watching or discussing that led you here.