Linear stability of two-dimensional flow in axisymmetric half-zones of low and intermediate prandtl numbers

• Material Type: 文書・図像類
• Title: Linear stability of two-dimensional flow in axisymmetric half-zones of low and intermediate prandtl numbers
• Author/Editor: Nienhueser, Ch.; Kuhlmann, Hendrik C.
• Author Heading: Nienhueser, Ch.; Kuhlmann, Hendrik C.
• Publication, Distribution, etc.: 宇宙開発事業団
• Publication Date: 2001-12-25
• Publication Date (W3CDTF): 2001-12-25
• Alternative Title: 低および中間プラントル数の軸対称半ゾーンにおける2次元流の線形安定性
• Periodical title: 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
• Pages: 181-208
• ISSN (Periodical Title): ISSN : 1345-7888
• Text Language Code: eng
• Subject Heading: 2次元流; 線形安定性; プラントル数; 液体ブリッジ; 熱毛細管流; 温度分布; 表面張力; レイノルズ数; 数値解析; two dimensional flow; linear stability; Prandtl number; liquid bridge; thermocapillary flow; temperature distribution; surface tension; Reynolds number; numerical analysis
• Target Audience: 一般
• Note (General): The thermocapillary flow in liquid bridges is investigated numerically by means of a linear stability analysis. In the limit of large mean surface tension the free-surface shape is independent of the flow and temperature fields and depends only on the volume of liquid and the hydrostatic pressure difference. A differential heating of the bounding circular disks then causes a steady two-dimensional thermocapillary flow which is calculated by a finite-difference method on body-fitted coordinates. The linear-stability problem for the basic flow is solved using azimuthal normal modes computed with the same discretization method. The dependence of the critical Reynolds number on the volume fraction, gravity level, and aspect ratio is investigated for intermediate Prandtl numbers. The effect of gravity on the flow stability is compared for small (Pr = 0.02) and large Prandtl numbers. Since the instabilities for small and large Prandtl numbers are markedly different, the gravity forces lead to a different behavior. While the hydrostatic shape of the bridge is the most important gravity effect on the critical conditions for low-Prandtl-number flows, buoyancy is the dominating factor for the flow stability when the Prandtl number is high. In addition to these investigations, the linear stability for acetone and methanol half-zones including the effect of evaporative cooling is calculated and compared with experimental data.; 資料番号: AA0032601007; レポート番号: NASDA-TMR-010015E
• Source: https://jaxa.repo.nii.ac.jp/?action=repository_action_common_download&item_id=42540&item_no=1&attribute_id=31&file_no=1
• Access Restrictions: 限定公開
• Data Provider (Database): 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）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 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