正方形角柱群内乱流のLESによる体積平均乱流輸送方程式の考察

• 桑田 祐丞

  大阪府立大学大学院工学研究科機械系専攻

• 須賀 一彦

  大阪府立大学大学院工学研究科機械系専攻

書誌事項

タイトル別名

• A Study on the Volume Averaged Turbulence Transport Equations by Performing LES of Square Rod Array Flows

抄録

To understand the mechanism of the turbulence transport in porous media, large eddy simulations have been performed by a multiple-relaxation time lattice Boltzmann method. The porous media presently considered are square rod arrays. Changing the square rod size, five different cases of the porous media are analysed. Using the simulation data, the budget terms of the volume averaged Reynolds stress equations are investigated in detail. It is found that the behaviour of the production, redistribution and dissipation terms drastically changes when the porosity of the porous media becomes higher than 0.75. When the porosity becomes higher, it is observed that a perturbation by the Kármán vortex shedding propagates in the whole domain. This perturbation is the source of the the cross-streamwise component of the Reynolds stress. It is confirmed that there is a relation between the porous characteristic scales and the turbulent length scale and one of the production terms of the transport equation of the volume averaged Reynolds stress can be modelled by the Darcy-Forchheimer form.

収録刊行物

• 日本機械学会論文集Ｂ編

  日本機械学会論文集Ｂ編 79 (805), 1752-1763, 2013

  一般社団法人 日本機械学会

キーワード

• Turbulence
• Square Rod Array
• Porous Media
• Lattice Boltzmann Method
• Large Eddy Simulation

詳細情報

• CRID: 1390001206260764288
• NII論文ID: 130004555259
• DOI: 10.1299/kikaib.79.1752
• ISSN: 18848346
• ISSN: 03875016
• Web Site: https://www.jstage.jst.go.jp/article/kikaib/79/805/79_1752/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可