Convection by small temperature difference in a rotating cylindrical vessel

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  • 回転円筒水槽内における小さな温度差による対流流れ
  • カイテン エントウ スイソウナイ ニオケル チイサナ オンドサ ニヨル タイリュウ ナガレ

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Abstract

We investigated the flow of the liquid that appears in a cylindrical vessel rotating about its vertical center axis with small horizontal temperature gradient. Several experimental investigations using two concentric cylinders have been carried out. In the present experiment, water fills both cylindrical vessel and its outside. Water in the cylindrical vessel is heated or chilled from the sidewall. The cylindrical vessel made of acryl is with a radius of 97 mm, and has a removable lid on water surface. We visualized the flow by the aluminum-powder suspension method. It was found that the flow patterns and the baroclinic waves have common points concerning wave number on the basis of the relationship of Taylor number and thermal Rossby number. There are some differences such as the absents of 'drift' and 'vacillation' and wave patterns with wave numbers more than 3.

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