液柱内マランゴニ対流の局所加熱による周方向波数制御(熱工学,内燃機関,動力など)

概要

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The thermocapillary convection in a half-zone liquid bridge of high Prandtl number fluid is widely known to exhibit a three-dimensional oscillatory flow after onset of oscillation. The oscillatory convection presents 'Standing' and 'Traveling' flows depending upon the temperature difference between the top and bottom rods. In the oscillatory state, the flow indicates a modal structure with azimuthal wave number depending upon the aspect ratio of liquid bridge and the intensity of the thermocapillarity expressed by the Marangoni number. The present study attempted to control the azimuthal wave number by heating the free surface locally with a prescribed frequency and intensity. The flow of the liquid bridge exhibited different modal structures depending upon the heating condition and a relation between the frequency and the modal structure was obtained.
一般社団法人日本機械学会の論文
2005-02-25