並列タイトル等低プラントル数流体の半ゾーン液体ブリッジにおける3次元振動流の数値シミュレーション
タイトル（掲載誌）宇宙開発事業団技術報告: Marangoni Convection Modeling Research: Annual Report April 1, 2000 - March 31, 2001 = NASDA Technical Memorandum: Marangoni Convection Modeling Research: Annual Report April 1, 2000 - March 31, 2001
一般注記A set of numerical simulations was conducted to understand characteristics of oscillatory Marangoni convection in half-zone liquid bridges with various aspect ratios (from 0.6 to 2.2) and Prandtl numbers (from 0 to 0.02) by a finite difference method. The simulation results indicated that under smaller temperature differences the flow in the liquid bridge is axisymmetric but it becomes unstable against a three dimensional disturbances beyond a certain threshold value of temperature difference. The flow becomes steady three dimensional. This steady flow becomes unstable against time dependent three dimensional disturbance beyond a second critical condition. The numerical simulations revealed the critical conditions, 3 D structure of disturbances and oscillation modes. The first critical conditions showed good agreements with those of linear stability analyses. The second critical conditions also agreed with previous values and gave new critical values for wide range of aspect ratio. Based on these simulations, a flow map was proposed for Pr = 0 fluid. Critical Reynolds numbers, flow mode and types of oscillations were also determined for Pr = 0.01 and 0.02 fluids.
資料番号: AA0032601005
レポート番号: NASDA-TMR-010015E
連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
提供元機関・データベース宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ