Title: Flow around a Surface Mounted Cubical Obstacle: Comparison of LES and RANS Results
Authors: Breuer, Michael 
Lakehal, Djamel
Rodi, Wolfgang
Language: eng
Subject (DDC): 000 Informatik, Information & Wissen, allgemeine Werke
500 Naturwissenschaften
600 Technik
Issue Date: 1996
Editors: Deville, Michel
Gavrilakis, Spyros
Ryhming, Inge L.
Publisher: Vieweg Verlag
Document Type: Conference Object
Source: Notes on Numerical Fluid Mechanics, vol. 53, pp. 22–30, 1996
Journal / Series / Working Paper (HSU): Notes on Numerical Fluid Mechanics
Volume: 53
Page Start: 22
Page End: 30
Publisher Place: Braunschweig
Conference: IMACS–COST Conf. on Computational Fluid Dynamics, Three–Dimensional Complex Flows, Lausanne, Switzerland, Sept. 13–15, 1995
The paper deals with a comparative study of LES and RANS (k-$\epsilon$ model) results for a typical bluff-body flow, namely the flow around a surface mounted cubical obstacle placed in a plane channel. For this test case detailed experimental data (Re=40,000) are available [11]. Two slightly different numerical solution procedures based on a 3-D finite-volume method are used in this investigation. The Reynolds-averaged equations for incompressible flow are solved implicitly [10], whereas in the LES code [1, 2, 3, 4, 5] an explicit second order Adams-Bashforth scheme is applied. Different formulations of the k-$\epsilon$ turbulence model are used in the RANS simulations, the standard version with wall functions, a RNG version, a modified version proposed by Kato and Launder [7], and a two-layer approach. For modeling the non-resolvable subgrid-scale motion in the LES two different models are applied, namely the well known Smagorinsky model [16] as well as the dynamic model originally proposed by Germano et al. [6]. The capability of the different methods is demonstrated by comparison with the measurements.
Organization Units (connected with the publication): Strömungsmechanik 
ISBN: 978-3-322-89838-8
Publisher DOI: 10.1007/978-3-322-89838-8_4
Appears in Collections:6 - Bibliographic Data - Publications of the HSU Researchers (before HSU)

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