Realizing turbulent statistics

Jérôme Hepffner, Yoshitsugu Naka, Koji Fukagata

研究成果: Article査読

8 被引用数 (Scopus)

抄録

How to design an artificial inflow condition in simulations of the Navier-Stokes equation that is already fully turbulent? This is the turbulent inflow problem. This first question is followed by: How much of the true turbulence must be reproduced at the inflow? We present a technique able to produce a random field with the exact two-point two-time covariance of a given reference turbulent flow. It is obtained as the output of a linear filter fed with white noise. The method is illustrated on the simulation of a turbulent free shear layer. The filter coefficients are obtained from the solution of the Yule-Walker equation, and the computation can be performed efficiently using a recursive solution procedure. The method should also be useful in the study of flow receptivity, when the processes of transition to turbulence are sensitive to the perturbation environment.

本文言語English
ページ(範囲)54-80
ページ数27
ジャーナルJournal of Fluid Mechanics
676
DOI
出版ステータスPublished - 2011 6 10

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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