Density gradient
Jet fluid (passive scalar)
LES of jet mixing
in supersonic crossflows
Kawai & Lele, AIAA J. 2010

Center for Next Generation Aircraft Research

Society for high Reynolds number aerodynamics

Welcome to Kawai Laboratory at Tohoku University

Welcome to Kawai Laboratory (Aerodynamic Design Research Group) at the Department of Aerospace Engineering, Tohoku University.
Our research draws from theoretical analysis, computational physics, data science, and high-performance computing to develop novel high-fidelity numerical simulation techniques for uncovering the fundamental flow physics underlying complex compressible, multi-scale and, multi-physics flows in aerospace engineering and also for developing next-generation aircraft aerodynamic design tools. Our research interests broadly include in the fields of fluid mechanics, with an emphasis on compressible flow, turbulence, shock waves, mixing and combustion, high-fidelity numerical methods, physical modeling, machine learning, uncertainty quantification, and other related topics in the aerospace engineering. Details of the on-going and past research topics are in Research.
Our group is also working on MEXT Program for Promoting Researches on the Supercomputer Fugaku, Leading research on innovative aircraft design technologies to replace flight test, where we conduct the first high-fidelity simulation around full aircraft by using state-of-the-art computational physics & Fugaku to lead innovative aircraft design.

Compressible flow physics and computational engineering in the Kawai Laboratory

What's New

Welcome to new faculty/staff members, Dr. Tamaki (Assis. Prof.) and Dr. Asada (PD)! The new academic year began.
Congratulations to Mr. Hayabe for receiving the Tohoku University President’s Award for the achievements during his Bachelor course!
Check out our new paper "Turbulence modeling for turbulent boundary layers at supercritical pressure: A model for turbulent mass flux" published in Flow, Turbulence and Combustion. Based on the analysis of the DNS database (Kawai J. Fluid Mech. 865, 2019), this paper proposed a RANS modeling for turbulent boundary layers at supercritical pressure where large density fluctuations are induced by the pseudo-boiling phenomena.
Check out our new paper "A stable and non-dissipative kinetic energy and entropy preserving (KEEP) scheme for non-conforming block boundaries on Cartesian grids" published in Comput. & Fluids. We proposed the stable and non-dissipative KEEP scheme for compressible flows, which preserves the kinetic energy and entropy at non-conforming block boundaries in on hierarchical Cartesian grids.
Kawai presented our work on spatiotemporal control of flame structures and modeling for reactive flow simulations at Symposium on Aerodynamics in Aerospace.
Our paper on "Large eddy simulation with modeled wall-stress: recent progress and future directions" published in 2016 was ranked in Top 1 in the Most Accessed Articles in 2018 Academic Year in the publications of JSME.
Kuya(Assis. Prof.), Fukushima(PD), and Tamaki(PD) presented their work at AIAA-SciTech2020 in Orlando, United States.
Our group has been extensively working on the high-fidelity DNS and LES studies of various turbulent flows, such as separated turbulent boundary layers, shock-boundary layer interaction, transonic airfoil buffet, airfoil stall phenomena, turbulent boundary layers at supercritical pressures, etc., using supercomputer K (10 Peta FLOPS computer). To make full use of our DNS and LES database, the turbulence database have been made open at our Flow Database. Currently, the wall-resolved LES database of A-airfoil near stall condition at Re_c = 2.1E6 by Asada & Kawai, Physics of Fluids (2018) have been open.
Kawai was invited to the JAXA Chofu Aerospace Center and gave a seminar talk on our recent study of high-fidelity LES for aircraft design.
Kuya(Assis. Prof.), Tamaki(PD), Ishitsuka(M2), Ota(M2), Shima(M1), and Kamogawa(M1) from our laboratory presented their work at the computational fluid dynamics conference at Hokkaido University, Sapporo, Japan.
Fukushima(PD), Tamaki(PD), and Hirai(M2) from our laboratory presented their work at APS-DFD2019 in Seattle, United States.
Old News