Multiscale finite element method applied to detached-eddy simulation for computational wind engineering

Yue Zhang, Rooh Ul Amin Khurram*, Wagdi G. Habashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A multiscale finite element method is applied to the Spalart-Allmaras turbulence model based detached-eddy simulation (DES). The multiscale arises from a decomposition of the scalar field into coarse (resolved) and fine (unresolved) scales. It corrects the lack of stability of the standard Galerkin formulation by modeling the scales that cannot be resolved by a given spatial discretization. The stabilization terms appear naturally and the resulting formulation provides effective stabilization in turbulent computations, where reaction-dominated effects strongly influence near-wall predictions. The multiscale DES is applied in the context of high-Reynolds flow over the Commonwealth Advisory Aeronautical Council (CAARC) standard tall building model, for both uniform and turbulent inflows. Time-averaged pressure coefficients on the exterior walls are compared with experiments and it is demonstrated that DES is able to resolve the turbulent features of the flow and accurately predict the surface pressure distributions under atmospheric boundary layer flows.

Original languageEnglish (US)
Pages (from-to)1-19
Number of pages19
JournalWind and Structures, An International Journal
Volume17
Issue number1
DOIs
StatePublished - Jul 1 2013

Keywords

  • CAARC model
  • Computational wind engineering
  • Detached-eddy simulation
  • Inflow turbulence generation
  • Multiscale method

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Modeling and Simulation
  • Building and Construction

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