US Department of Defense, Ames Research Center
Computational Fluid Dynamics Research for Multidisciplinary Simulations
Thursday, April 14, 2011, 3:00 – 4:00 PM
Abstract: Computational Fluid Dynamics (CFD) is a critical component in a number of multidisciplinary applications such as biological flow processes, energy systems, and the design of complex aerodynamics vehicles. My research encompasses two broad areas. First, I examine the multidisciplinary role of CFD in complex simulations. To this end, I elaborate on my post-doctoral research contributions to the Helios code, an object-oriented, multi-language, multi-physics rotocraft simulation package. As part of the CREATE program, Helios forms a critical part of a paradigm shift to streamline the acquisition of air vehicles within the Department of Defense through the use of automated high-fidelity computational tools. By enforcing modularity in the design of multidisciplinary simulation tools like Helios, extensible and interchangeable capabilities may be employed to simulate a variety of physical systems including high Reynolds number flow fluid-structure interaction, and dynamics and control of aerodynamic vehicles. The second area of research addresses current challenges in CFD through novel methods, such as meshless algorithms, strand grids, high-order correction methods, solution error quantification, and grid-specific multigrid techniques. Many of these methods are designed to completely automate mesh generation for complex geometry. Furthermore, these methods allow for greater scalability than previous approaches for large problems requiring parallel computation. I will also discuss error quantification methods and novel high-order correction methods designed to reduce uncertainty in CFD solutions in regions of poor mesh quality. These advances will enable CFD to expand to new multidisciplinary environments.
Bio: Dr. Aaron Katz is currently a post-doctoral researcher with the Computational Research and Engineering Acquisition Tools and Environments (CREATE) program of the Department of Defense. Prior to this position, Dr. Katz received his Masters and Doctorate Degrees in Aeronautics and Astronautics from Stanford University, with Professor Antony Jameson as his advisor. He was supported in his graduate work by a National Defense Science and Engineering Graduate (NDSEG) Fellowship. Before attending Stanford, Dr. Katz received his Bachelor of Science degree from Utah State University, with a minor in Portuguese.
Faculty Host: Peyman Givi