Equations of Motion

Abstract

We turn now to the formulation of the basic equations — the starting point of the theories that will lead, one hopes, to an understanding of phenomena such as those described in Chapters 2 to 4. These equations are formulations appropriate to a fluid in motion of the usual laws of mechanics — conservation of mass and Newton’s laws of motion. In some situations other physical processes may be present, thermodynamic processes for instance, and equations for these are similarly formulated.