Three-dimensional numerical method for simulating unsteady vortex breakdown in confined swirling flows

Fotis Sotiropoulos, Yiannis Ventikos

Research output: Contribution to conferencePaperpeer-review

Abstract

An efficient finite-volume numerical method, based on the artificial-compressibility approach, is developed for solving the unsteady three-dimensional incompressible Navier-Stokes equations. The divergence-free constraint is satisfied at every instant in time using an explicit, multistage, dual time-stepping procedure enhanced with local tune-stepping, implicit residual smoothing, and multigrid acceleration. The method is applied to simulate unsteady vortex breakdown in confined swirling flows. Results are presented for the so-called Esqudier cylinder, a closed cylindrical container with one rotating endwall, and swirling flow through a straight circular diffuser. Comparisons of the computed results with available flow visualization experiments demonstrate the ability of the method to resolve and clarify several aspects of vortex breakdown previously observed in the laboratory.

Original languageEnglish (US)
StatePublished - Jan 1 1997
EventProceedings of the 1997 ASME Fluids Engineering Division Summer Meeting, FEDSM'97. Part 16 (of 24) - Vancouver, Can
Duration: Jun 22 1997Jun 26 1997

Other

OtherProceedings of the 1997 ASME Fluids Engineering Division Summer Meeting, FEDSM'97. Part 16 (of 24)
CityVancouver, Can
Period6/22/976/26/97

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