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Channel flow around cylinders, balls, squares, etc.

The following examples concern flows, mostly through channels, around a set of obstacles, as for instance cylinders or balls.

Right after the obstacle(s), the flow separates and produces complex flow patterns, oscillating in space and time. In many applications, the corresponding drag and lift forces acting on the obstacle(s) are of major interest, and a difficult numerical job to do! The complexity of the problem depends on the:

  • inflow speed
  • viscosity
  • size and distance of the obstacles, w.r.t. to the channel walls and to each other

A systematic variation of these different configurations is part of the following flow situations.

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