Large-eddy simulation of a circular cylinder on unstructured grids

R. P. Hansen, L. N. Long

Research output: Contribution to conferencePaper

10 Scopus citations

Abstract

A computational study of unsteady, separated, low-Reynolds number fluid flow is made using a second-order accurate, cell-centered finite-volume method on unstructured grids. The three-dimensional simulations include largeeddy simulation turbulence modeling using a fixed-coefficient Smagorinsky siibgrid-scale model. The flow about a three-dimensional circular cylinder at Reynolds number 3900 and Mach number 0.2 was studied using a standard Navier-Stokes formulation with and without the subgrid-scale modeling. A third case was also tested using a modified form of the Navier-Stokes equations with subgrid-scale modeling. Comparisons are made with experiment and selected three-dimensional numerical calculations performed on structured grids. The frequency of the unsteady vortex shedding was in good agreement with experiment, however, the numerical dissipation inherent in the upwind flux calculations affected the details of the time-averaged flowfield. The results showed an increased base pressure, shortened recirculation zones in the cylinder wake, and excessive drag compared to experiment for all cases.2002 by Hansen and Long.

Original languageEnglish (US)
StatePublished - 2002
Event40th AIAA Aerospace Sciences Meeting and Exhibit 2002 - Reno, NV, United States
Duration: Jan 14 2002Jan 17 2002

Other

Other40th AIAA Aerospace Sciences Meeting and Exhibit 2002
CountryUnited States
CityReno, NV
Period1/14/021/17/02

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

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    Hansen, R. P., & Long, L. N. (2002). Large-eddy simulation of a circular cylinder on unstructured grids. Paper presented at 40th AIAA Aerospace Sciences Meeting and Exhibit 2002, Reno, NV, United States.