Higher-order RANS turbulence models for separated flows

Metadata Updated: July 17, 2020

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: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date August 1, 2018
Metadata Updated Date July 17, 2020

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Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date July 17, 2020
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_34782
Maintainer
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
Harvest Object Id 7b2f9fe9-6f32-40c1-9ad9-6e568f1ae5ff
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
Data Last Modified 2020-01-29
Program Code 026:027
Source Datajson Identifier True
Source Hash efdfb2c95776f514c3f82fcbf10b0496223e678b
Source Schema Version 1.1

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