Advancing Predictive Strategies for Wall-Bounded Turbulence by Fundamental Studies and Data-driven Modeling
Abstract
Our research contributes in the areas of Reynolds-averaged modeling, detached eddysimulation and data driven modeling. Toward that end, we pursue fundamental, high- delity computer simulations of turbulent ow with rough walls and with pressure gradients,to provide information on turbulence structure, and to provide data for model development.Disequilibrium is studied in numerical simulations of the evolution of turbulence as thesurface texture switches from rough to smooth and from smooth to rough. Evolution inpressure gradients over smooth and rough walls provide further fundamental information onturbulence under strong non-equilibrium conditions.Reynolds averaged closure development is based on stress lag, elliptic blending and dis-placement of origin ideas for non-equilibrium turbulence on rough or smooth surfaces. Inparallel, techniques of Adaptive Detached Eddy Simulation are being extended to roughsurfaces and to better capture turbulence structure.Newly developed data-driven methods provide a powerful method for extracting informa-tion on turbulence variables and to assist with developing predictive models. The approach isbased on creating data elds of turbulence variables by optimizing the t between Reynolds-averaged computations and high delity data.These components of our pre-proposal are well integrated: the data-driven methods makeuse of high delity simulation data to extract information for turbulence models; AdaptiveDES is a seamless, hybrid RANS/LES method that adds a capability of eddy resolvingsimulation to a Reynolds averaged closure model. We are optimistic that this program ofresearch will lead to improvements in modeling and simulation tools for Naval applications.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 03, 2017
- Source ID
- N000141712200
Entities
People
- Paul A. Durbin
Organizations
- Iowa State University
- Office of Naval Research
- United States Navy