Computing non-equilibrium turbulent flows with time-dependent rans and vles

Speziale, Charles G.

doi:10.1007/BFb0107089

Charles G. Speziale¹

Part of the book series: Lecture Notes in Physics ((LNP,volume 490))

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Abstract

The computation of complex non-equilibrium turbulent flows is discussed from a basic theoretical standpoint. An entirely new approach to time-dependent Reynolds-Averaged Navier-Stokes (RANS) computations and Very Large-Eddy Simulations (VLES) is presented. The unique feature of this new approach is that subgrid scale models are proposed that allow a DNS to go continuously to a RANS computation in the coarse mesh/infinite Reynolds number limit. In between these two limits, we have an LES or VLES. Furthermore, the Reynolds stress model that is ultimately recovered in the coarse mesh limit has built in non-equilibrium features that make it suitable for time-dependent RANS. The fundamental technical issues associated with this new approach are discussed in detail and a few illustrative calculations are presented to amplify the central points of the paper.

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Aerospace & Mechanical Engineering Department, Boston University, 02215, Boston, MA
Charles G. Speziale

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Charles G. Speziale
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Paul Kutler Jolen Flores Jean-Jacques Chattot

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Speziale, C.G. (1997). Computing non-equilibrium turbulent flows with time-dependent rans and vles. In: Kutler, P., Flores, J., Chattot, JJ. (eds) Fifteenth International Conference on Numerical Methods in Fluid Dynamics. Lecture Notes in Physics, vol 490. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0107089

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DOI: https://doi.org/10.1007/BFb0107089
Published: 04 May 2007
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-63054-8
Online ISBN: 978-3-540-69120-4
eBook Packages: Springer Book Archive

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