著者

井上 智嗣 田中 満 萩原 良道

出版者

一般社団法人日本機械学会

雑誌

計算力学講演会講演論文集 (ISSN:1348026X)

巻号頁・発行日

vol.2006, no.19, pp.729-730, 2006-11-02

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Direct numerical simulations (DNS) have been conducted for the heat transfer in pseudo-turbulence induced by small contaminated bubbles. The void fraction ranges from 1.5% to 9.0%. Air bubbles with a diameter of 500μm, are considered. We imposed a constant temperature gradient in the vertical or horizontal directions. Computational results show that the heat transfer in the case of vertical temperature gradient is highly enhanced by a bubble in pseudo-turbulence. With the increase in void fraction, the heat transfer is attenuated in the case of vertical gradient while the heat transfer is enhanced in the case of horizontal gradient.