Adaptive simulation based on urans and ensemble Kalman filter for resolving turbulent flow on LES

Sasuga Ito, Masato Furukawa, Yamada Kazutoyo, Kaito Manabe

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

Turbulence is one of the most important phenomena in fluid dynamics. In general, turbulent phenomena can be resolved more clearly with Large Eddy Simulation (LES) compared with Unsteady Reynolds Averaged Navier-Stokes (URANS), and the numerical solution shows good agreements with that based on Direct Numerical Simulation (DNS). However, more time and computational power are needed on LES than those on URANS. If possible, the ideal simulation method is that the method is able to resolve the turbulent phenomena same quality as the results based on DNS and LES with less time and less computational power same as that on URANS. This paper shows an adaptive simulation method based on URANS and Ensemble Kalman Filter (Enkf) to reproduce the flow fields based on LES. In this study, a two-dimensional turbine cascade flow has been solved with URANS and LES. The adaptive simulation method has been also applied to the cascade flow. As the results, in the flow field of URANS with the assimilated turbulence model’s parameters, the separation phenomenon and the boundary layer thickness was close to that of the time averaged LES.

本文言語英語
ホスト出版物のタイトルComputational Fluid Dynamics; Micro and Nano Fluid Dynamics
出版社American Society of Mechanical Engineers (ASME)
ISBN(電子版)9780791883730
DOI
出版ステータス出版済み - 2020
イベントASME 2020 Fluids Engineering Division Summer Meeting, FEDSM 2020, collocated with the ASME 2020 Heat Transfer Summer Conference and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels - Virtual, Online
継続期間: 7 13 20207 15 2020

出版物シリーズ

名前American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
3
ISSN(印刷版)0888-8116

会議

会議ASME 2020 Fluids Engineering Division Summer Meeting, FEDSM 2020, collocated with the ASME 2020 Heat Transfer Summer Conference and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels
CityVirtual, Online
Period7/13/207/15/20

All Science Journal Classification (ASJC) codes

  • 機械工学

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