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This paper shows a method of symmetrization of an asymmetric flow of avis-cous incompressible fluid in a flat diffuser using a weak periodicvibration ef-fect on the velocity input flow. The results are obtained for aviscous incom-pressible fluid by simulation based on numerical solving of theNavier-Stokes equations. The results of numerical simulation have shown one ofthe ways of symme-trization of asymmetric laminar flows of a viscousincompressible fluid in a flat diffuser with a weak periodic effect on theinput flow velocity. It is shown that vibration effects, even at amplitudesless than 1% of the velocity can symmetrize the fluid flow in the diffuser.Richardson's "annular effect" for a harmonic oscillating fluid flow in thediffuser was shown.

Symmetrization of laminar viscous fluid flow in a flat diffuser by periodic impaction on the inlet flow velocity