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Higher-order RANS turbulence models for separated flows

Metadata Updated: November 12, 2020

Higher-order Reynolds-averaged Navier-Stokes (RANS) models are developed to overcome the shortcomings of second-moment RANS models in predicting separated flows.  These differential transport models hold promise in predicting reversal of turbulent transport typical in adverse pressure gradient flows.  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.  Second-moment closures (SMC) have failed to improve flow separation predictions over simpler two-equation models.  Failure may be in part due to inability of algebraic models for turbulent transport to predict transport reversal typical in decelerating flows.  To overcome this shortcoming, we represent the turbulent transport term using a differential model.  The differential transport model leads to closing the RANS system equations either at the fourth- or fifth-order moment level.    Models are constructed based on a-priori studies on existing moment budget term models.  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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Dates

Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Maintainer
Identifier TECHPORT_34782
Data First Published 2015-09-01
Data Last Modified 2020-01-29
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 5e32005a-e652-4deb-9e67-125c6cb32c1b
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://techport.nasa.gov/view/34782
Program Code 026:027
Source Datajson Identifier True
Source Hash 5710605116d0c4b4aa74249842bd088ed1285415
Source Schema Version 1.1

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