Fundamentals of flow

摘要: There are two methods for studying the movement of flow. One method follows any arbitrary particle with its kaleidoscopic changes in velocity and acceleration. This is called Lagrangian method. The other one a by which, rather than following particular fluid particle, pressure studied at fixed positions space x, y, z time t . Eulerian A curve formed vectors each certain streamline. In words, where tangent point indicates direction that Floating aluminum powder on surface flowing water then taking photograph, gives flow trace powder. Whenever streamlines around body observed, they vary according to relative relationship between observer body. By moving both cylinder camera placed tank same time, it possible observe streamlines. Furthermore, whose state; expressed velocity, pressure, density position: does not change steady On hand, state an unsteady