Turbulence Modeling In
The Atmospheric Boundary Layer:
A Review And Some Recent Developments
Author(s)
J. G. Bartzis
Abstract
Wind flow and pollutant dispersion are the main two points of interest that make
the prediction of the atmospheric flow a necessity for the modern society.
Atmospheric problems are an important CFD application field and have
repeatedly boosted CFD development. CFD-LES methodology is more attractive
to local scale problems and neutral flows. CFD-RANS methodology is the main
tool used today for practical problems. The problem of turbulence closure
scheme selection for CFD-RANS applications is still an open question in
atmospheric flows. For local scale problems the two equation turbulence
modelling approach is the dominant one and especially the standard k-ε model.
In the literature one can find simpler models (empirical, one equation models) or
higher models as well as Reynolds stress models. Recently, the k-ε model has
been re-examined and a new general approach in developing two-equation
turbulence models is proposed with the aim of improving their reliability and
consequently their range of applicability. The results up to now are quite
encouraging.
Keywords: atmospheric boundary layer, CFD modelling, k –ζ model, turbulence
closure, turbulent length scale, urban canyon.
1 Introduction
Weather forecast and pollutant dispersion are the main two points of interest that
make the prediction of the atmospheric flow a necessity for the modern society.
Atmospheric problems are an important CFD application field and have
repeatedly boosted CFD development. Other methods to calculate the flow still
Keywords
atmospheric boundary layer, CFD modelling, k –ζ model, turbulence
closure, turbulent length scale, urban canyon.
Related Book
Other papers in this volume
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