58th CFD Seminar:
FLOW ANALYSIS AND ADJOINT-BASED DESIGN OPTIMIZATION USING A HIGHER ORDER CFD METHOD
Dr. Li Wang, National Center for Computational Engineering, University of Tennessee at Chattanooga
July 14, 2015, 11:00 am, NIA, Rm 142
Live Video
Abstract:
The computational analysis and design for multiscale physics and complex systems demand computationally accurate and efficient discretization methods. High-order discretization methods have gained increasing popularity in a wide range of application scenarios in sciences and engineering. In this presentation, the focuses will be two-fold. First, the techniques of a high- order discontinuous Galerkin finite element method for aerodynamic turbulent flow simulation will be discussed. In particular, the spatial discretization procedures and the implementation for Reynolds Averaged Navier-Stokes as well as large-eddy simulation will be covered in detail. The second focus will be on the integration of the high-order CFD method with sensitivity analysis capabilities for aerodynamic shape optimization. The discrete adjoint method is derived in a mathematically rigorous framework and provides important search directions towards an optimum design solution. Simulation of turbulence using the developed high-order discontinuous Galerkin method will be presented with an emphasis on examining the accuracy of different orders of discretization schemes. Several optimization examples will be described as well to demonstrate the effectiveness of the discrete adjoint algorithm in steady and unsteady design optimization.
Biography:
Li Wang earned her PhD degree in Mechanical Engineering from the University of Wyoming in 2009 and she is currently a Research Assistant Professor in the SimCenter at the University of Tennessee, Chattanooga. She has successfully developed computational software to perform high-fidelity aerodynamic simulation and design. Her research centers on turbulent flow simulation and modeling, high-order finite element CFD methods, adjoint-based sensitivity analysis and design optimization, adaptive meshing, multigrid acceleration strategies, and high- performance computing. Since 2009 she has extended the software capabilities to high-frequency electromagnetic applications. She is currently serving as Associate Member of the American Institute of Aeronautics and Astronautics (AIAA) Applied Aerodynamics Technical Committee and has been an active participant in multiple research grants and contracts from NASA, DoD and U.S. Army.
Contact: Li-Wang@utc.edu