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RANS-Modeling. Concepts - Perspectives - Approaches

Eisfeld, Bernhard (2018) RANS-Modeling. Concepts - Perspectives - Approaches. [Other]

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Abstract

CFD-based aerodynamic design crucially depends on the capability of predicting turbulent flows, including separation. Limited resources and constraints on the response-times make methods based on the Reynolds-averaged Navier-Stokes (RANS) equations still indispensable for this purpose in industry. The increasing application of CFD towards conditions at the borders of flight is leading to a demand for improved accuracy for the prediction at least of flows with incipient up to mild separation. Inspired by recent discussions, the presentation will address the RANS-concept in terms of ensemble averaging. Eddy-viscosity as well as Reynolds-stress transport models are briefly described as different, but related flavors of RANS-modeling. Observed limitations are motivating DLR's strategy for model improvement. Assuming that a strictly universal model might be impossible, the idea of physics-based targeted modeling and self-adaptation is developed. First results for the plane mixing layer and its impact on reattachment are presented as well as remaining open questions.

Item URL in elib:https://elib.dlr.de/119949/
Document Type:Other
Additional Information:Es handelt sich um einen Vortrag, der bei der NASA gehalten wurde
Title:RANS-Modeling. Concepts - Perspectives - Approaches
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Eisfeld, BernhardUNSPECIFIEDhttps://orcid.org/0000-0002-1751-8872
Date:26 March 2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Turbulence Modeling, Reynolds-Averaged Navier-Stokes
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - VicToria
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > CASE, BS
Deposited By: Eisfeld, Dr.-Ing. Bernhard
Deposited On:21 Jun 2018 10:19
Last Modified:21 Jun 2018 10:19

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