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Lagrangian and Eulerian Representations of Fluid Flow ...
Lagrangian and Eulerian Representations of Fluid Flow: Kinematics and the Equations of Motion James F. Price Woods Hole Oceanographic Institution, Woods Hole, MA, 02543. June 7, 2006. Summary: This essay introduces the two methods that are widely used to observe and analyze Fluid flows, either by observing the trajectories of specific Fluid parcels, which yields what is commonly termed a Lagrangian representation , or by observing the Fluid velocity at fixed positions, which yields an Eulerian representation . Lagrangian methods are often the most efficient way to sample a Fluid flow and the physical conservation laws are inherently Lagrangian since they apply to moving Fluid volumes rather than to the Fluid that happens to be present at some fixed point in space.
Fluid mechanics has to be taken in bite-sized pieces, topics, but I also had the uneasy feeling that this fluid mechanics course might have seemed to the students to be little more than a collection of applied mathematics and physics topics having no clear, unifying theme.
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