階層型直交格子法を用いた線形化格子ボルツマン法による 一円柱周りの放射音解析

• 前山 大貴

  連絡先著者（Corresponding author）：[e-mail] 東京大学大学院工学系研究科

• 今村 太郎

  東京大学大学院工学系研究科

書誌事項

タイトル別名

• Acoustic Scattering Analysis around a Circular Cylinder using Linearized Lattice Boltzmann Method on Hierarchical Cartesian Grid
• カイソウガタ チョッコウ ゴウシホウ オ モチイタ センケイカ ゴウシ ボルツマンホウ ニ ヨル イチ エンチュウ マワリ ノ ホウシャオン カイセキ

抄録

A benchmark problem, acoustic scattering analysis around a circular cylinder, is solved in order to show the applicability of lattice Boltzmann method (LBM) for a direct simulation of sound propagation with reflection, diffraction and interference. First, compressible Euler equation with sound source term is derived from lattice Boltzmann equation with sound source term in order to show the consistency between the equations. Next, the benchmark problem is analyzed using linearized version of lattice Boltzmann method (LLBM). The effects of physical viscosity and grid resolution on the directivity pattern of the sound pressure are evaluated. In order to investigate the independent effect of the grid resolutions at the propagation region, the body surface region and the sound source region, hierarchical Cartesian grid is developed on LLBM. It is found that grid resolutions at all three regions are important for the accurate acoustic simulation. By setting sufficient grid resolution at each region, good agreement is observed between the numerical result and the exact solution.

収録刊行物

• 日本航空宇宙学会論文集

  日本航空宇宙学会論文集 65 (2), 87-94, 2017

  一般社団法人 日本航空宇宙学会

キーワード

• Acoustics
• Lattice Boltzmann Method
• Hierarchical Cartesian Grid

詳細情報

• CRID: 1390282679445833088
• NII論文ID: 130005549039
• NII書誌ID: AA11307372
• DOI: 10.2322/jjsass.65.87
• ISSN: 24323691
• ISSN: 13446460
• NDL書誌ID: 028126041
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I028126041
• Web Site: https://www.jstage.jst.go.jp/article/jjsass/65/2/65_65_87/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可