Search Results 1-20 of 405

  • HEAT TRANSFER INTO OCEAN WATER DURING GROWTH OF WIND WAVES  [in Japanese]

    渡部 靖憲 , 杉村 一直 , 山下 賢人 , 猿渡 亜由未

    土木学会論文集. B2, 海岸工学 Journal of Japan Society of Civil Engineers. 土木学会海岸工学委員会 編 75(2), I_49-54, 2019

  • Effects of viscoelastic Mach numbers on capillary entry flow of wormlike micelle solutions  [in Japanese]

    TANAKA Keisuke , MIKAMI Fumihiko

    … <p>Flow patterns of capillary entry flow of viscoelastic wormlike micellar fluids are investigated experimentally using a PIV (Particle Image Velocimetry). … Two types of velocity distributions are observed for the flow into the capillary depending on the viscoelastic Mach numbers which are defined as the ratio of the average velocity of the capillary flow to the shear wave propagation speed in the fluid. …

    The Proceedings of Mechanical Engineering Congress, Japan 2019(0), S05310P, 2019

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  • Optimization of horn shape to amplify longitudinal vibration by using ultrasonic wave  [in Japanese]

    ARAKAWA Ryo , MORI Shigeki , SHIBUYA Yotsugi , NAGANAWA Akihiro , OBINATA Goro

    … <p>Film formation methods by liquid atomization is widely studied, and among these, liquid atomization by using ultrasonic waves is classified into methods by cavitation and capillary waves which generate liquid drop. … Authors have been researching and developing the ultrasonic atomization caused by capillary waves which applied to a Langevin-type transducer. …

    The Proceedings of Mechanical Engineering Congress, Japan 2019(0), J11102, 2019

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  • Study on the Lateral Sloshing Behavior under Microgravity Condition Targeted for a Propellant Tank  [in Japanese]

    MICHIHARA Mouri , IMAI Ryoji

    … In order to investigate the effects of the contact line velocity on dynamic contact angle, we measured dynamic contact angle using a capillary tube. … CFD analysis introducing Cox's equation in consideration of capillary experimental results were also conducted and these results were compared with µg experimental results. …

    International journal of microgravity science and application 36(4), 360403, 2019

    IR  J-STAGE 

  • HEAT TRANSFER INTO OCEAN WATER DURING GROWTH OF WIND WAVES  [in Japanese]

    WATANABE Yasunori , SUGIMURA Kazunao , YAMASHITA Kento , SARUWATARI Ayumi

    … When capillary surface disturbances occur in an early stage of wave generation, a wind boundary layer evolve into turbulent one containing streamwise counter-rotating vortices, which induces convergent and divergent surface flows to vary thickness of heat boundary layer over the water surface, and thus modify heat flux coming into ocean. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 75(2), I_49-I_54, 2019

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  • Investigation of Capillary Wave in Ultrasonic Atomization Produced by Focused Ultrasound Using Highspeed Camera  [in Japanese]

    塚原 健生 , 益子 大作 , 吉澤 晋

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 118(229), 1-6, 2018-10-04

  • MATHEMATICAL THEORIES ON THE CAPILLARY ACTION IN HISTORICAL STUDY (Mathematical Aspects and Applications of Nonlinear Wave Phenomena)

    Masuda Shigeru

    … We discuss the mathematical theory of deduction of the capillary action by Laplace, Gauss, Poisson. … The former two are deduce the equations of the capillary surface, and the latter, Poisson confirms the formulae, in another analytical problems. …

    数理解析研究所講究録 (2076), 76-87, 2018-07

    IR 

  • Fine Droplets Generation Induced by Interactions between Focused Ultrasound and a Liquid Surface  [in Japanese]

    SEKO Kazuya , KOBAYASHI Kazumichi , FUJII Hiroyuki , WATANABE Masao

    … This atomization process is well known that droplets are generated from the apexes of standing capillary waves with a wavelength that can be related to ultrasonic frequencies. … In addition, there is a hypothesis that cavitation bubble oscillations can play a significant role in the pinch-off of droplets from capillary wave. …

    JAPANESE JOURNAL OF MULTIPHASE FLOW 32(1), 59-64, 2018

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  • Development of optical hand-held viscosity sensor for simple and quick <i>in situ</i> measurement  [in Japanese]

    EGUCHI Masato , TAGUCHI Yoshihiro , NAGASAKA Yuji

    … The proposed sensor enables non-contact and high-speed viscosity measurement based on the optical measurement method called laser-induced capillary wave method. …

    Transactions of the JSME (in Japanese) 84(860), 17-00572-17-00572, 2018

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  • A gas sensor by using capillary waves on ionic liquid droplet  [in Japanese]

    齋藤 宏 , Nguyen Thanh-Vinh , 下山 勲

    「センサ・マイクロマシンと応用システム」シンポジウム論文集 電気学会センサ・マイクロマシン部門 [編] 34, 3p, 2017-10-31

  • Microbubble Generation Technique with Using Ultrasonic Pressure Oscillation  [in Japanese]

    幕田 寿典

    精密工学会誌 = Journal of the Japan Society for Precision Engineering 83(7), 627-630, 2017-07

  • Microbubble Generation Technique with Using Ultrasonic Pressure Oscillation  [in Japanese]

    MAKUTA Toshinori

    Journal of the Japan Society for Precision Engineering 83(7), 627-630, 2017

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  • A free surface modelling method in SPH simulation of ultrasonic atomization  [in Japanese]

    ITO Ryo , ARAKAWA Ryo , MORI Shigeki , SHIBUYA Yotsugu

    超音波を応用した霧化技術は,有機 EL や太陽電池などの製造において,真空環境を必要としない塗布による大気中成膜を実現するために有望な技術の一つである.超音波による霧化現象は古くから知られているものの現状では理論的解明は十分とは言えず,数値シミュレーションを応用した霧化現象の理論的解明が必要と考えられる.本報告では,粒子法をベースとし自由表面の模擬および固体-液体界面の濡れ性の表現に新たなアイディ …

    The Proceedings of The Computational Mechanics Conference 2017.30(0), 118, 2017

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  • SEA SURFACE SHEAR LAYER AND AIR-WATER MOMENTUM TRANSFER IN THE INITIAL STAGE OF WIND-WAVE GENERATION  [in Japanese]

    WATANABE Yasunori , SUGIMURA Kazunao

    …  This paper presents mechanical features of transitional air-water momentum and energy transfers in initial growing wind waves on the basis of the fluid flow statistics observed in wind-wave tunnel experiments. … In the initial waves with short fetch, superpositions of capillary waves on the crest of gravity waves generate significant vorticity and transport it downward, resulting in a thick momentum boundary layer containing organized vortices. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 73(2), I_73-I_78, 2017

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  • Vibration of Water Sessile Drops in Various Oils

    Sakka Tetsuo , Yamashita Shinji , Amano Ken-ichi , Nishi Naoya

    … The resonant frequency is explained by the capillary wave propagating along the meridian curve of the drop with the fixed-end boundary condition at the three-phase contact line, although the sessile drop in air considerably deviates from the fixed-end boundary condition. …

    Chemistry Letters 46(9), 1337-1340, 2017

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  • Numerical Simulation of Ultrasonic Atomization  [in Japanese]

    Ito Ryo , Arakawa Ryo , Mori Shigeki , Shibuya Yotsugu

    超音波を利用した霧化技術は有機ELや太陽光発電パネルなど今後大気中における成膜が不可欠な産業分野において有望な技術と考えられる.しかし,古くから知られている超音波霧化現象の理論的解明は十分とは言えず,数値シミュレーションを応用した霧化現象の理論的解明が必要と考えている.本報告では,粒子法をベースとし自由表面の模擬に新たなアイディアを加えた解析について報告する.

    Proceedings of JSPE Semestrial Meeting 2017S(0), 145-146, 2017

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  • P-wave propagation in dry rocks under controlled temperature and humidity

    Nakao Akimasa , Nara Yoshitaka , Kubo Taiki

    International Journal of Rock Mechanics and Mining Sciences (86), 157-165, 2016-07

    IR 

  • Experimental investigation of atomization behavior of droplet in a single-axis acoustic levitator  [in Japanese]

    Kono Kengo , Hasegawa Koji , Ohtake Hiroyasu , Nimura Yuki , Niwa Motonori , Abe Yutaka

    <p>We investigated the interfacial behavior and atomization of an acoustically levitated droplet. It is vital to understand the non-linear dynamic behavior of the acoustically levitated droplet …

    The Proceedings of the Fluids engineering conference 2016(0), 0703, 2016

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  • Rock physics research with application to CO<sub>2</sub> geological storage II: Relationship between CO<sub>2</sub> saturation and P-wave velocity in a porous sandstone.  [in Japanese]

    Nishizawa Osamu , Zhang Yi , Xue Ziqiu

    … in porous sandstones are primarily controlled by capillary pressure and the different scales of inhomogeneity in geomaterials: from pore networks to geological structures. … Following the view points in the first article, we present our experimental investigation on the relationship between P-wave velocity and CO<sub>2</sub> …

    BUTSURI-TANSA(Geophysical Exploration) 69(3), 195-214, 2016

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  • <b>Surface Disintegration and Atomization of Micro Water Droplet Subjected to Surface Acoustic </b><b>Wave </b>

    SUDO Seiichi , KUWANO Hiroki

    … The dynamic behavior of water droplet subject to surface acoustic wave was observed using a high speed video camera system. … Liquid was disintegrated into fine liquid particles by the action of surface acoustic wave. …

    Advanced Experimental Mechanics 1(0), 42-46, 2016

    J-STAGE 

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