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Large-Eddy Simulation of Turbulence in the Free Atmosphere and Behind Aircraft

Schumann, U. and Dörnbrack, A. and Dürbeck, T. and Gerz, T. (1997) Large-Eddy Simulation of Turbulence in the Free Atmosphere and Behind Aircraft. Fluid Dynamics Research, 20, pp. 1-10. doi: 10.1016/S0169-5983(96)00044-5.

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Official URL: http://www.elsevier.com/wps/find/journaldescription.cws_home/505708/description#description

Abstract

The method of large-eddy simulation has been used for a wide variety of atmospheric flow problems. This paper gives an overview on recent applications of this method to turbulence in the free atmosphere under stably stratified conditions. In particular, flows in the wake of aircraft are studied in light of the potential impact of aircraft exhausts on the chemical and climatological state of the atmosphere. It is shown that different profiles of heat and moisture in the initial conditions of a jet representing engine exhaust gases may cause larger water saturation and hence earlier contrail formation than assumed up to now. The instability of trailing vortices in the wake of an aircraft is simulated up to the fully turbulent regime. The vertical diffusivity of aircraft exhaust is large in the vortex regime and much smaller than horizontal diffusivities in the later diffusion regime. The three-dimensional formation of a critical layer and breaking of gravity waves is simulated.

Item URL in elib:https://elib.dlr.de/32304/
Document Type:Article
Title:Large-Eddy Simulation of Turbulence in the Free Atmosphere and Behind Aircraft
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schumann, U.UNSPECIFIEDUNSPECIFIED
Dörnbrack, A.UNSPECIFIEDUNSPECIFIED
Dürbeck, T.UNSPECIFIEDUNSPECIFIED
Gerz, T.UNSPECIFIEDUNSPECIFIED
Date:1997
Journal or Publication Title:Fluid Dynamics Research
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:20
DOI :10.1016/S0169-5983(96)00044-5
Page Range:pp. 1-10
Status:Published
Keywords:LES, Turbulenz, Freistrahl, Large-eddy simulation (LES); Turbulence; Aircraft emissions; Contrail formation; Trailing vortices; Effective diffusivities; Breaking gravity waves
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Low-Emission Air Traffic (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Deposited By: DLR-Beauftragter, elib
Deposited On:02 Apr 2006
Last Modified:31 Jul 2019 19:17

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