A dynamic localization model for large-eddy simulation of turbulent flows

Sandip Ghosal, Thomas S. Lund, Parviz Moin, Knut Akselvoll

Research output: Contribution to journalArticlepeer-review

560 Scopus citations

Abstract

In a previous paper, Germano, et al. (1991) proposed a method for computing coefficients of subgrid-scale eddy viscosity models as a function of space and time. This procedure has the distinct advantage of being self-calibrating and requires no a priori specification of model coefficients or the use of wall damping functions. However, the original formulation contained some mathematical inconsistencies that limited the utility of the model. In particular, the applicability of the model was restricted to flows that are statistically homogeneous in at least one direction. These inconsistencies and limitations are discussed and a new formulation that rectifies them is proposed. The new formulation leads to an integral equation whose solution yields the model coefficient as a function of position and time. The method can be applied to general inhomogeneous flows and does not suffer from the mathematical inconsistencies inherent in the previous formulation. The model has been tested in isotropic turbulence and in the flow over a backward-facing step.

Original languageEnglish (US)
Pages (from-to)229-255
Number of pages27
JournalJournal of fluid Mechanics
Volume286
DOIs
StatePublished - Mar 1995

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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