Analysis of Highly-Resolved Simulations of 2-D Humps Toward Improvement of Second-Moment Closures
- Author:
- Jeyapaul, Elbert
- Published:
- January 07, 2013.
- Physical Description:
- 1 electronic document
- Additional Creators:
- Rumsey Christopher
- Access Online:
- hdl.handle.net
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
- Summary:
- Fully resolved simulation data of flow separation over 2-D humps has been used to analyze the modeling terms in second-moment closures of the Reynolds-averaged Navier- Stokes equations. Existing models for the pressure-strain and dissipation terms have been analyzed using a priori calculations. All pressure-strain models are incorrect in the high-strain region near separation, although a better match is observed downstream, well into the separated-flow region. Near-wall inhomogeneity causes pressure-strain models to predict incorrect signs for the normal components close to the wall. In a posteriori computations, full Reynolds stress and explicit algebraic Reynolds stress models predict the separation point with varying degrees of success. However, as with one- and two-equation models, the separation bubble size is invariably over-predicted.
- Collection:
- NASA Technical Reports Server (NTRS) Collection.
- Note:
- Document ID: 20130003229., NF1676L-14868., AIAA Paper 2013-0684., and 51st AIAA Aerospace Sciences Meeting; 7-10 Jan. 2013; Grapevine, TX; United States.
- Terms of Use and Reproduction:
- Copyright, Distribution as joint owner in the copyright.
- Access Online:
- hdl.handle.net
View MARC record | catkey: 15975925