0118 円管内乱流パフの分裂(OS1 噴流,後流および剥離流れ現象の探求と技術革新,オーガナイズドセッション)

DOI Web Site

書誌事項

タイトル別名
  • 0118 The splitting of a turbulent puff in pipe flow

抄録

The transition to turbulence of the flow in a straight pipe is numerically studied over a range of Reynolds number where turbulence begins to expand by puff splitting. Puff splitting presents itself as a stochastic two-step process. A splitting puff first emits a kind of chaotic pseudopod made of azimuthally localized streaky structures at the downstream (leading) laminar-turbulent interface. This structure then expands azimuthally as it detaches from the parent puff. Detachment results from a collapse of turbulence over the whole section of the tube. Once the process is achieved a new puff is born ahead.

収録刊行物

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ