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Research Abstracts Online
January 2008 - March 2009

University of Minnesota Twin Cities
Institute of Technology
Department of Aerospace Engineering and Mechanics

PI: Krishnan Mahesh, Fellow

High-fidelity Simulation of Turbulent Flows

These researchers work with direct numerical simulation (DNS) and large-eddy simulation (LES) of turbulent flows. A novel aspect of their research is the development and use of numerical methods that are general enough to account for realistic engineering geometries and accurate enough to simulate turbulence. This is achieved by the group's developing non-dissipative robust methods for turbulent flows on unstructured grids. The use of unstructured grids allows arbitrarily complex geometries to be efficiently gridded. A novelty of the algorithm is that it discretely conserves not only momentum, but also kinetic energy. This allows robustness without numerical dissipation. Such robustness is imperative to perform accurate simulations in complex geometries at high Reynolds numbers.

The group is working on several projects that utilize and further develop this simulation capability. These include: simulation of propeller crashback; high speed transition; simulating plasmas in air; turbulent combustion; LES of compressible flows in complex geometries; simulation of cavitation; high-speed injection; and wall-modeling of high-Reynolds-number attached flows.

Group Members

Raja Asaithambi, Graduate Student
Xiaochuan Chai, Graduate Student
Shankar Ghosh, Research Associate
Prahladh Iyer, Graduate student
Hyunchul Jang, Graduate Student
Michael Mattson, Graduate Student
Suman Muppidi, Research Associate
Zane Nitzorski, Graduate Student
Noma Park, Research Associate
Rajes Sau, Graduate Student
Aman Verma, Graduate Student
Duo Zhou, Graduate Student