Turbulence Anisotropy Modeling Based on the Quadratic Constitutive Relation (QCR) Using LES Flow Databases

AMS Seminar Series

Speaker: Yoshiharu Tamaki, Department of Aeronautical and Astronautical Engineering, The University of Tokyo
October 17, 2024

Presentation

Seminar Slide Deck (PDF-24.9MB)

Abstract

Stress-induced secondary flows (the second type of Prandtl’s secondary flows) play a crucial role in the formation of corner-flow separations because they transport the streamwise momentum toward the corner. Therefore, anisotropic turbulence models such as the quadratic constitutive relations (QCR) are necessary for the accurate prediction of corner flow separations. This presentation introduces the recent development of a new QCR based on the large-eddy simulation of a side-wall interference flow at a high Reynolds number. The developed model (QCR2024) is validated through a priori tests of various flows, where the results show improved prediction of the Reynolds stress anisotropy.

Biography

Yoshiharu Tamaki is currently an assistant professor in the Department of Aeronautical and Astronautical Engineering at the University of Tokyo. He got his Ph.D. from the University of Tokyo in 2018, supervised by Prof. Taro Imamura. After that, he worked at Tohoku University with Prof. Soshi Kawai on large-eddy simulations of high Reynolds number flows until 2023. His research areas include immersed boundary methods, turbulence modeling, and HPC computing.

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