1.4 Momentum Conservation
There are several ways of deriving the momentum conservation equation. One approach is to use the control volume method described in Sect. 1.2; in this method, one uses Eqs. (1.2) and (1.4) and replaces O by v, e.g. for a fixed fluid-containing volume of space:
To express the right hand side in terms of intensive properties, one has to consider the forces which may act on the fluid in a CV:
-surface forces (pressure, normal and shear stresses, surface tension etc.);
- body forces (gravity, centrifugal and Coriolis forces, electromagnetic forces,
etc.).