著者

植木 祥高

出版者

The Visualization Society of Japan

雑誌

可視化情報学会誌 (ISSN:09164731)

巻号頁・発行日

vol.36, no.142, pp.16-20, 2016 (Released:2017-07-01)

参考文献数

25

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UVP計測法が様々な液体金属流れに適用されている.本稿においては核融合炉にて伝熱媒体として使用が検討されている液体金属リチウム鉛に着目し,リチウム鉛流れのUVP計測に関する現時点までに行ってきた一連の研究を概括するとともに今後の展望について紹介する.

著者

宇野 元気 藤原 邦夫 植木 祥高 芝原 正彦

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.84, no.858, pp.17-00409-17-00409, 2018 (Released:2018-02-25)

参考文献数

13

被引用文献数

1

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Heterogeneous nucleation of droplets on a solid surface with and without nanostructures was investigated by the classical molecular dynamics simulations. The simulations investigated effects of the nanostructures on the condensation processes and the nucleation rates. The calculation system was consisted of the fluid molecules(Ar) and the solid atoms(Pt) which interact through the 12-6 Lennard Jones(LJ) potential function, and a liquid membrane existed in the vicinity of the upper solid surface at the initial condition. Then, we changed the temperature of the lower solid wall to a lower value, which enabled us to investigate the nucleation processes in the vicinity of the lower solid surface with and without the nanostructures under a constant pressure. The potential functions between the fluid molecules and solid atoms were also assumed to be the LJ form, and the energy scale parameter between fluid molecules and solid atoms was changed to simulate a hydrophobic surface. The results showed that clusters tend to be formed near the side walls of the nanostructures and grow between the nanostructures. It was also shown that the nucleation rate is influenced by morphology of the nanostructures; the nucleation rate increases with the increase of the height of the nanostructures and with the decrease of the spacing between the nanostructures. Furthermore, the results revealed that there is a positive correlation between the nucleation rate and the heat flux measured at the lower solid wall.