Effect of free stream turbulence on the entrainment characteristics of jets

ORAL

Abstract

Direct numerical simulations of turbulent planar jets are used to analyze the effects of free stream turbulence on the entrainment characteristics and enstrophy dynamics near the turbulent/turbulent interface (TTI) that separates strong turbulence (inside the jet shear layer) from weaker turbulence outside of the jet. The higher the integral scales and turbulence intensities in the free stream the more effects it has on the jet shear layer, and for strong free stream turbulence the viscous superlayer is absent from the jet edges.

*Part of this work was supported by JSPS KAKENHI Grant Number 25002531 and MEXT KAKENHI Grant Numbers 25289030, 25289031, 2563005.

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Authors

  • Tomoaki Watanabe

    • Nagoya University, 464-8603 Nagoya, Japan

  • Carlos B. da Silva

    • IST - U. Lisbon
    • LAETA, IDMEC, Instituto Superior Tecnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
    • Tecnico Lisboa

  • Yasuhiko Sakai

    • Nagoya University, 464-8603 Nagoya, Japan

  • Kouji Nagata

    • Nagoya University, 464-8603 Nagoya, Japan