Higher-order RANS turbulence models for separated flows

Metadata Updated: May 2, 2019

Higher-order Reynolds-averaged Navier-Stokes (RANS) models are developed to overcome the shortcomings of second-moment RANS models in predicting separated flows.[HTML_REMOVED] These differential transport models hold promise in predicting reversal of turbulent transport typical in adverse pressure gradient flows.[HTML_REMOVED] Third- and fourth-order moment transport models are developed and used to simulate canonical boundary layer and two-dimensional separated flows. Existing RANS turbulence models over-predict the extent of separation, making them unfit for off-design aerodynamic studies.[HTML_REMOVED] Second-moment closures (SMC) have failed to improve flow separation predictions over simpler two-equation models.[HTML_REMOVED] Failure may be in part due to inability of algebraic models for turbulent transport to predict transport reversal typical in decelerating flows.[HTML_REMOVED] To overcome this shortcoming, we represent the turbulent transport term using a differential model.[HTML_REMOVED] The differential transport model leads to closing the RANS system equations either at the fourth- or fifth-order moment level.[HTML_REMOVED][HTML_REMOVED][HTML_REMOVED] Models are constructed based on a-priori studies on existing moment budget term models.[HTML_REMOVED] The system of about 10-14 turbulence equations are solved iteratively.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Dates

Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_34782
Maintainer
TECHPORT SUPPORT
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Datagov Dedupe Retained 20190501230127
Harvest Object Id dabb2588-5119-4e3a-96fb-5010017f936b
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2015-09-01
Homepage URL https://techport.nasa.gov/view/34782
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash 909186c9073c6975acbeda31c7d386e56091f60a
Source Schema Version 1.1

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