NDLI: Approximate Wall Boundary Conditions in the Large-Eddy Simulation of High Reynolds Number Flow

Content Provider	Springer Nature Link
Author	Cabot, W. Moin, P.
Copyright Year	2000
Abstract	The near-wall regions of high Reynolds numbers turbulent flows must be modelled to treat many practical engineering and aeronautical applications. In this review we examine results from simulations of both attached and separated flows on coarse grids in which the near-wall regions are not resolved and are instead represented by approximate wall boundary conditions. The simulations use the dynamic Smagorinsky subgrid-scale model and a second-order finite-difference method. Typical results are found to be mixed, with acceptable results found in many cases in the core of the flow far from the walls, provided there is adequate numerical resolution, but with poorer results generally found near the wall. Deficiencies in this approach are caused in part by both inaccuracies in subgrid-scale modelling and numerical errors in the low-order finite-difference method on coarse near-wall grids, which should be taken into account when constructing models and performing large-eddy simulation on coarse grids. A promising new method for developing wall models from optimal control theory is also discussed.
Starting Page	269
Ending Page	291
Page Count	23
File Format	PDF
ISSN	13866184
Journal	Flow, Turbulence and Combustion
Volume Number	63
Issue Number	1-4
e-ISSN	15731987
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2000-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Mechanics Automotive and Aerospace Engineering, Traffic
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Physical and Theoretical Chemistry Chemical Engineering

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