[Seminar] Computational science of turbulence - Universality, intermittency, and connection to real turbulence phenomena

Speaker

Prof. Takashi Ishihara / Okayama University
He graduated from the Department of Physics, Faculty of Science, Nagoya University in 1989, and the Department of Applied Physics, Graduate School of Engineering in 1994, where he received a Dr. of Engineering from Nagoya University. His career started as a Research assistant in the Department of Mathematics at Toyama University in 1994, then from 1997 Research Assistant, Lecturer, and Associate Professor at the Graduate School of Engineering at Nagoya University. Since 2017, he has been a Professor at Okayama University.
His main research field is the computational science of turbulence. In 2002, he received the Gordon Bell Award for 16.4-Tflops Direct Numerical Simulation of Turbulence by a Fourier Spectral Method on the Earth Simulator. His group also performed a large-scale DNS with up to 12288 cubed grid points using the K computer.

Title

Computational science of turbulence - Universality, intermittency, and connection to real turbulence phenomena

Abstract

Large-scale direct numerical simulations (DNSs) of incompressible turbulence in a periodic box have been performed using the Earth Simulator, the K computer, and the Fugaku. The DNSs have revealed some universal statistical properties in the inertial subrange of turbulence as well as the intermittent properties of high Reynolds number turbulence. Large-scale DNSs of turbulence can be also used to get clues to understand real turbulence phenomena. Some examples (related data analysis and numerical experiments) are explained.