• [2017-07-07]

  Prof. Peyman Givi visited LTCS

 Recently, Prof. Peyman Givi of the University of Pittsburgh, visited the State Key Laboratory for Turbulence and Complex Systems(LTCS), and discussed with the laboratory on turbulence simulation.

  Prof. Peyman Givi received his bachelor’s degree from the Department of Mechanical Engineering at Youngstown State University in 1980. In 1982, he received the Master degree from the Department of Mechanical Engineering at Carnegie-Mellon University. And then in 1984, he received the PhD degree from the Department of Mechanical Engineering at Carnegie-Mellon University. Prof. Givi presently worked as the Distinguished Professor of Mechanical Engineering (2015-present), James T. MacLeod Professor in Swanson School of Engineering. Previously he held theposition of UB Distinguished Professor of Aerospace Engineering atthe SUNY-Buffalo.  He has also worked as a Research Scientist at Flow Research Company (Kent, WA), and  has had visiting appointments at the NASA Langley and Glenn (Lewis) Centers. Prof. Givi is an expert in turbulent flow simulations. He is Deputy Editor of AIAA Journal and on editorial boards of several other journals including Computer and Fluids and Journal of Applied Fluid Mechanics.

  During the visit, Professor Givi and the lab members communicated with the self-contained filtered density function for large-eddy simulation of turbulent flow. Prof. Givi introduced the joint frequency-velocity-scalar filtered mass density function (FVS-FMDF), the most sophisticated form of the model to-date, and simplified version (VS-FMDF) which does not include the subgrid scale (SGS) frequency. Hydrodynamic closure in incompress-ible, non-reacting flows has been achieved via the marginal velocity-FDF (V-FDF), and the one which considers only the species mass fraction field is the scalar-FDF (S-FDF and S-FMDF). The latter is the most elementary form of FDF and is most widely used currently. The extension to include for energy analysis is via Entropy FDF (En-FDF).