Project Details
Projekt
Implicit subgrid modeling of large eddy simulations with gradient-based optimization methods
Subject Area
Fluid Mechanics
Term
from 2015 to 2018
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 282417701
The goal of this research proposal is the development of a high order discontinuous Galerkin method for large eddy simulations of turbulent flows. Therefore free process parameters are introduced such that the approximation error takes over the role of subgrid modeling, usually referred to as implicit LES modeling. The free parameters are based on different approximations of surface and volume integrals, as well as a hybridization using a finite volume approach and are optimized with respect to the modeling of effects on a subgrid-scale. This is done by gradient based optimization methods, which remain robust and efficient even for sensitive parameters. For the calculation of the necessary derivatives adjoint calculus is applied, which is implemented in an automated manner using algorithmic differentiation. The core competencies of the two working groups in Stuttgart and Kaiserslautern in the development of high-resolution methods and adjoint-based optimization methods are combined in this project perfectly.
DFG Programme
Research Grants
International Connection
USA
Cooperation Partners
Professor Dr.-Ing. Gregor Gassner; Professor David Kopriva, Ph.D.
