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 | Abstract: | 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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