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Influence of a small amount of noncondensable gas on shock wave generation inside a collapsing vapor bubble

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/74635

Title: Influence of a small amount of noncondensable gas on shock wave generation inside a collapsing vapor bubble
Authors: Yamamoto, Kyohei Browse this author
Kobayashi, Kazumichi Browse this author →KAKEN DB
Watanabe, Masao Browse this author →KAKEN DB
Fujii, Hiroyuki Browse this author →KAKEN DB
Kon, Misaki Browse this author
Takahira, Hiroyuki Browse this author →KAKEN DB
Issue Date: 11-Jun-2019
Publisher: American Physical Society (APS)
Journal Title: Physical Review Fluids
Volume: 4
Issue: 6
Start Page: 063603-1
End Page: 063603-10
Publisher DOI: 10.1103/PhysRevFluids.4.063603
Abstract: In this paper, the influence of a small amount of noncondensable gas on shock wave generation inside a collapsing vapor bubble is examined by combining numerical analysis of a bubble dynamics equation and of the Boltzmann equation for gas flow inside a bubble. We show the importance of the high Knudsen number in the flow, i.e., the nonequilibrium gas flow, to the temperature field inside the collapsing bubble. We also show that the maximum mean Knudsen number inside the collapsing bubble can be evaluated from the initial Knudsen number and the initial number density ratio of noncondensable gas and vapor molecules. As a result, we conclude that a small amount of noncondensable gas strongly affects the temperature field inside the collapsing bubble, preventing shock wave generation inside the bubble in the final stage of collapse.
Rights: ©2019 American Physical Society
Type: article
URI: http://hdl.handle.net/2115/74635
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 小林 一道

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