Riabouchinsky solid

In fluid mechanics a Riabouchinsky solid is a technique used for approximating boundary layer separation from a bluff body using potential flow. It is named for Dimitri Pavlovitch Riabouchinsky.

Related Topics:
Fluid mechanics - Boundary layer separation - Bluff body - Potential flow - Dimitri Pavlovitch Riabouchinsky

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Riabouchinsky solids are typically used for analysing the behaviour of bodies moving through otherwise quiescent fluid (examples would include moving cars, or buildings in a windfield).

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Typically the streamline that touches the edge of the body is modelled as having no transverse pressure gradient and thus may be styled as a free surface after separation.

Related Topics:
Streamline - Free surface

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The use of Riabouchinsky solids renders d'Alembert's paradox void; the technique typically gives reasonable estimates for the drag offered by bluff bodies moving through inviscid fluids.

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