LES, coarse LES, and transient RANS comparisons on the flow across a tube bundle

LES, coarse LES, and transient RANS comparisons on the flow across a tube bundle The cross-flow in a staggered tube bundle is computed with an LES and a transient Reynolds stress transport model (RSTM) in 2D and 3D, with two levels of grid refinement. The numerical method is based on a finite volume approach on unstructured grids using a collocated arrangement for all the unknowns. It is shown that the LES results on the fine mesh are comparable to a DNS and experiments and reasonable agreement is still achieved with a coarse mesh. The RSTM also produced satisfactory results in 3D but showed no advantage over the LES when the grid was coarsened. The 2D RSTM, which produced strong vortex shedding, was found to be physically unreasonable. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Heat and Fluid Flow Elsevier

LES, coarse LES, and transient RANS comparisons on the flow across a tube bundle

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Publisher
Elsevier
Copyright
Copyright © 2003 Elsevier Science Inc.
ISSN
0142-727X
eISSN
1879-2278
D.O.I.
10.1016/S0142-727X(03)00060-2
Publisher site
See Article on Publisher Site

Abstract

The cross-flow in a staggered tube bundle is computed with an LES and a transient Reynolds stress transport model (RSTM) in 2D and 3D, with two levels of grid refinement. The numerical method is based on a finite volume approach on unstructured grids using a collocated arrangement for all the unknowns. It is shown that the LES results on the fine mesh are comparable to a DNS and experiments and reasonable agreement is still achieved with a coarse mesh. The RSTM also produced satisfactory results in 3D but showed no advantage over the LES when the grid was coarsened. The 2D RSTM, which produced strong vortex shedding, was found to be physically unreasonable.

Journal

International Journal of Heat and Fluid FlowElsevier

Published: Aug 1, 2003

References

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