Study on surface deformation and internal flow in large levitated droplet

大悬浮液滴表面变形及内部流动研究

• 批准号: 16360097
• 负责人: ABE Yutaka
• 金额: $ 8.38万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360097/
• 关键词: Levitated droplet; Resonance; Boundary vortex method; Rotation; Deformation; Ultrasonic levitation; Electro-static levitation; 固有振動; 微分幾何; ガウス=コダッチ方程式; 回転変形; 超音場; ソリトン理論; 微分幾何学; 液滴振動

IN FY.2004 and 2005, droplet levitation experiments are conducted by using the electrostatic levitation system and ultrasonic levitation system, as well as analytical study by nonlinear theory and multi-dimensional unsteady numerical analysis. Through those experiments and analysis, the following results are obtained.(1)From the electrostatic levitation experiment, it is confirmed that the amplitude of the deformation and the frequency of the rotation affect the resonance frequency of the levitated droplet.(2)From the acoustic levitation experiment, it is clarified that complex flow with vortex exists in the levitated droplet under both normal and reduced gravity condition.(3)New nonlinear theoretical frame work is constructed for the nonlinear surface deformation behavior including the effect of rotation.(4)A multi-dimensional unsteady numerical code for levitated droplet with free surface is developed and the code performance is verified with the present levitation experimental data.(5)It is clarified that the surface deformation of the levitated droplet is significantly affected by the gravity. It is also pointed out that the reduced gravity experiment is effective to clarify the influence of the gravity on the nonlinear dynamic behavior on the large levitated droplet.

在FY.2004和2005中，采用静电悬浮系统和超声波悬浮系统进行了液滴悬浮实验，并采用非线性理论和多维非定常数值分析进行了分析研究。通过这些实验和分析，得到了以下结果：(1)从静电悬浮实验中证实了变形幅度和旋转频率对悬浮液滴共振频率的影响。(2)通过声悬浮实验，明确了在正常重力和失重条件下，悬浮液滴内部都存在复杂的涡旋流动。(3)构建了包含旋转影响的非线性表面变形行为的新的非线性理论框架。(4)建立了具有自由表面的悬浮液滴的多维非定常数值代码，并用现有的悬浮实验数据验证了代码的性能。(5)阐明了重力对悬浮液滴表面变形的显著影响。减小重力实验可以有效地阐明重力对大悬浮液滴非线性动力学行为的影响。

项目成果

Study on Internal Flow and Surface Deformation of Large Levitated by Ultrasonic Wave (in Japanese)

超声波悬浮大型物体内部流动及表面变形研究（日文）

• 发表时间: 2005
• 期刊: Proceedings of the 18^<th> Computational Mechanics Conference
• 作者: Yutaka Abe;Daisuke Hyuga;Shogo Yamada;Kazuyoshi Aoki
• 通讯作者: Kazuyoshi Aoki

Numerical simulation of ultrasonic wave field of acoustic levitation,

声悬浮超声波场的数值模拟，

• 发表时间: 2005
• 期刊: Proceedings of the Interdisciplinary Transport Phenomena in Microgravity and Space Sciences Conference IV
• 作者: Yutaka Abe;Daisuke Hyuga;Shogo Yamada;Kazuyoshi Aoki
• 通讯作者: Kazuyoshi Aoki

Study on characteristics of droplet levitation by ultrasonic wave

超声波液滴悬浮特性研究

• 发表时间: 2004
• 期刊: Proceedings of 5^<th> International Conference on Multiphase Flow
• 作者: Kazuyoshi Aoki;Shogo Yamada;Masahiro Kawaji;Yutaka Abe
• 通讯作者: Yutaka Abe

Study on Non-Linear Behavior of Liquid Drop Oscillation

液滴振动非线性行为的研究

• 发表时间: 2005
• 期刊: AIAA 2005-0723
• 作者: H.Onodera;S.Matsumoto;T.Ishikawa;P.-F.Paradis;S.Yoda;K.Wakashima
• 通讯作者: K.Wakashima

Study on levitated droplet surface behavior by ultrasonic wave (in Japanese)

超声波悬浮液滴表面行为研究（日文）

• 发表时间: 2004
• 期刊: Proceedings of JSMF Annual Meeting
• 作者: Shogo Yamada;Kazuyoshi Aoki;Yutaka Abe;Masahiro Kawaji;Katsuhiro Nishinari
• 通讯作者: Katsuhiro Nishinari