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ISSN オンライン: 2642-0554

HYBRID RANS/LES : SPATIAL-RESOLUTION AND ENERGY-TRANSFER ISSUES

Paul Batten
Metacomp Technologies Inc, 650 Hampshire Rd #200, Westlake Village, CA 91361, USA

U. C. Goldberg
Metacomp Technologies Inc, 650 Hampshire Rd #200, Westlake Village, California 91361, USA

S. Palaniswamy
Metacomp Technologies Inc, 650 Hampshire Rd #200, Westlake Village, California 91361, USA

S. R. Chakravarthy
Metacomp Technologies Inc, 650 Hampshire Rd #200, Westlake Village, California 91361, USA

要約

This paper considers issues relating to the development of hybrid models of turbulence which blend automatically between conventional unsteady Reynolds-Averaged Navier-Stokes (URANS) simulation and large-eddy simulation (LES), according to the local grid density. Several independent research efforts have already been directed toward locally embedded LES, using both zonal approaches and emerging hybrid methods; the latter attempting to capture the switch between LES and RANS within a single modeling framework. This paper reviews some existing developments in the area and identifies several shared philosophies and common goals, as well as a remaining weakness, concerning the transfer of kinetic-energy between unresolved and resolved components. A framework is introduced in an attempt to account for this missing kinetic-energy transfer.