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In computational fluid dynamics, the key difference between Finite Element Method (FEM) and Finite Volume Method (FVM) lies in how they discretize and solve fluid flow equations. FEM divides the domain into smaller elements and uses piecewise polynomial functions to approximate the solution, while FVM divides the domain into control volumes and solves the equations at the center of each volume. FEM is more flexible for complex geometries, while FVM conserves mass and energy better.

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