日本地球惑星科学連合2022年大会

講演情報

[J] ポスター発表

セッション記号 M (領域外・複数領域) » M-IS ジョイント

[M-IS21] 地球流体力学:地球惑星現象への分野横断的アプローチ

2022年6月1日(水) 11:00 〜 13:00 オンラインポスターZoom会場 (31) (Ch.31)

コンビーナ:伊賀 啓太(東京大学大気海洋研究所)、コンビーナ:吉田 茂生(九州大学大学院理学研究院地球惑星科学部門)、柳澤 孝寿(国立研究開発法人海洋研究開発機構 海域地震火山部門)、コンビーナ:相木 秀則(名古屋大学)、座長:伊賀 啓太(東京大学大気海洋研究所)

11:00 〜 13:00

[MIS21-P04] Convection patterns in an internally heated fluid layer with background rotation

*田坂 裕司1能登 大輔1柳澤 孝寿2 (1.北海道大学大学院工学研究院、2.海洋研究開発機構)

キーワード:対流パターン、内部発熱層、回転

Natural convection induced by internal heat source in a horizontal fluid layer has been studied as a model of convections in fluid layers with asymmetric temperature profiles in the gravity direction. We reported results of the experimental investigation for pattern formation of internal heating convection with background rotation. Three types of visualization experiment, shear field by flake particles, temperature field by micro capsules of temperature chromic liquid crystal, and velocity vector field by particle imaging velocimetry, elucidated the convection pattern transition in parameter fields with Rayleigh number and Taylor number. The regime map represents that the transition from large, quasi-polygonal cells usually observed in the internally heated convection to small, quasi-regular cells is organized by Rossby number. In addition to these, a new regime termed descending sheet convection was observed at relatively large Rayleigh numbers. Additional scaling analysis tried to explain size variation of the convection patterns with respect to Rossby number.