By Rainer Friedrich, Wolfgang Rodi

ISBN-10: 1402004869

ISBN-13: 9781402004865

Includes the lawsuits of the EUROMECH Colloquium, held in Munich, Germany. Articles specialise in new advancements within the box of large-eddy simulation of complicated flows regarding the subjects of modeling and research of subgrid scales, numerical matters in LES, and combustion and magnetohydrodynamics.

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Extra info for Advances in LES of complex flows: proceedings of the Euromech Colloquium 412, held in Munich, Germany 4-6 October 2000

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According to eq. (6), this secondary filter is of order in terms of the primary filter width is the order of the primary filter The transfer function of the secondary filter is close to unity in which ensures that resolved scales are practically unaffected by secondary filtering. , 2001a. , 2001b), removing the arbitrariness of an a priori parameter choice. 3. ADM employed with low-order finite-difference schemes for com­ pressible isotropic decaying turbulence Industrial CFD codes commonly employ low-order discretization schemes such as order finite differences.

All three issues are under considerable development at present and topic of ongoing research. We compile a list of ‘good practices’ in the study and development of LES, in this section. The development of rigorous modeling guidelines, related to mathematical properties of the turbulent stress tensor has proven to be very helpful in LES, of which Germano’s identity and dynamic modeling is a prominent ex­ ample. We indicated the use of realizability conditions in subgrid modeling and arrived at generalized similarity models using approximate inversion.

1. , 2001a, 2001b). With the ADM approach an approxi­ mation to the unfiltered solution is obtained from the filtered solution by a series expansion involving repeated filtering. Given a sufficiently good approximation of the unfiltered solution at a time instant, the flux terms of the underlying filtered transport equations can be computed directly, avoiding the need to explicitly com­ 33 R. Friedrich and W. ), Advances in LES of Complex Flows, 33-47. © 2002 Kluwer Academic Publishers. Printed in the Netherlands, 34 S.

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Advances in LES of complex flows: proceedings of the Euromech Colloquium 412, held in Munich, Germany 4-6 October 2000 by Rainer Friedrich, Wolfgang Rodi

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