Article | REF: BE8153 V2

Fluid mechanical basic equations

Author: André LALLEMAND

Publication date: July 10, 2015, Review date: January 4, 2020

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4. Kinetic energy balance. Generalized Bernoulli equation

4.1 General case

The kinetic energy theorem is as follows.

The variation in kinetic energy over the unit time of a material system is equal to the power exerted by the internal and external forces applied to that system.

To translate this theorem, we use the equation for the balance of a scalar quantity [equation (3) ]. Here, the scalar quantity G is the kinetic energy E c of the fluid contained in volume V at time t, and the volume quantity g is the kinetic energy per unit volume ρv ...

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Kinetic energy balance. Generalized Bernoulli equation