Flow around a Surface Mounted Cubical Obstacle: Comparison of LES and RANS Results
Publication date
1996
Document type
Conference paper
Author
Editor
Deville, M.
Gavrilakis, S.
Rhyming, I. L.
Organisational unit
DOI
10.1007/978-3-322-89838-8_4
ISBN
978-3-322-89838-8
Conference
IMACS–COST Conf. on Computational Fluid Dynamics, Three-Dimensional Complex Flows, Lausanne, Switzerland, Sept. 13–15, 1995
Periodical volume
53
Book title
Computation of 3D Complex Flows
First page
22
Last page
30
Peer-reviewed
✅
Part of the university bibliography
Nein
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.
Cite as
Breuer, M., Lakehal, D., Rodi, W. (1996). Flow around a Surface Mounted Cubical Obstacle: Comparison of LES and RANS-Results. In: Deville, M., Gavrilakis, S., Ryhming, I.L. (eds) Computation of Three-Dimensional Complex Flows. Notes on Numerical Fluid Mechanics (NNFM), vol 49. Vieweg+Teubner Verlag. https://doi.org/10.1007/978-3-322-89838-8_4
Version
Not applicable (or unknown)
Access Right
Metadata only access