Search Results 1-20 of 399

  • 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

    J-STAGE 

  • 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

    J-STAGE 

  • 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

    J-STAGE 

  • 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

    J-STAGE 

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

    WATANABE Yasunori , SUGIMURA Kazunao

    本研究は,風洞可視化実験から,風波の発生,成長過程における波浪下の流速分布の遷移,乱流統計量の変化を基に,非平衡風波場における運動量,エネルギー輸送機構を議論するものである.初期波において毛管波の重畳と重力波のクレストへの集中が顕著な渦生成を誘発し,大気境界層と同等の運動量境界層の形成を通して運動量,エネルギーを深い位置まで輸送する.フェッチの増大と共に,吹送流による波-流れ相互作用は重力波前面を …

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

    J-STAGE 

  • 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

    J-STAGE 

  • 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

    J-STAGE 

  • 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

    J-STAGE 

  • 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

     解説 (I) では二酸化炭素 (CO<sub>2</sub>) 地中貯留に最適とされる,多孔質砂岩でのCO<sub>2</sub>貯留メカニズムを述べた。ポイントは,貯留層でのCO<sub>2</sub>の移動とトラップがキャピラリー圧と不均質に支配されることである。不均質のスケールは,孔隙から地層の堆積構造までの …

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

    J-STAGE 

  • <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 

  • A BASIC STUDY ON BEACH PROFILE CHANGES DUE TO CAPILLARY BARRIER OF REUSED SHELLS  [in Japanese]

    SUGA Hiroki , TSUJIMOTO Gozo , KAKINOKI Tetsuya , UNO Kohji , KOBAYASHI Kaoru

    水産系副産物(ホタテ貝殻など)の利用法の一つとして降雨浸透制御技術であるキャピラリーバリアへの活用が検討されている.通常,キャピラリーバリアには砂と礫が用いられるが,近年では水産系副産物である貝殻を用いる研究・開発も進められている.このキャピラリーバリア機能を砂浜に適用することで砂層内に浸透した海水をより迅速に沖へ排水し,砂の侵食を低減する効果と共に,砂の堆積を促進する効果も期待できる.<b …

    Journal of Japan Society of Civil Engineers, Ser. B3 (Ocean Engineering) 72(2), I_556-I_561, 2016

    J-STAGE 

  • Evaluation of diversion length of the capillary barrier with nonflatness of regular sine wave shape between sand and gravel layers  [in Japanese]

    MATSUMOTO Kazunobu , KOBAYASHI Kaoru , MORII Toshihiro , NAKAFUSA Satoru

    キャピラリーバリア(以下CB)は,砂層とその下部に礫層を重ねた土層構造であり,浸出水を抑制するための降雨浸透制御技術の一つとして利用されている。砂層と礫層の保水性,透水性などの違いによってCB機能は発揮されるが,実験による検証はCB層境界面が平坦であることが前提となっている。しかし,実施工時に広範囲の層境界面の平坦性を実験と同等に確保することは,施工工程やコストに大きく影響し,品質管理上の課題でも …

    Japanese Geotechnical Journal 11(2), 139-148, 2016

    J-STAGE 

  • Transverse instabilities of ascending planar jets formed by wave impacts on vertical walls

    Watanabe Y. , Ingram D. M.

    … When a steep breaking wave hits a vertical sea wall, in shallow water, a rapidly ascending planar jet forms. … This jet is ejected with high acceleration due to pressure created by the violent wave impact on the wall, creating a so-called 'flip-through' event. … These mechanisms help to explain the columnar structures often seen in photographs of violent wave impacts on harbour walls. …

    Proceedings of the royal society a-mathematical physical and engineering sciences 471(2182), 20150397, 2015-10-09

    IR  DOI 

  • 122 Optimization of Surface Shape in Ultrasonic Atomization  [in Japanese]

    ARAKAWA Ryo , SAKURADA Akira , MORI Shigeki , ETOH Masato , NAGANAWA Akihiro , SHIBUYA Yotsugi , OBINATA Goro

    … It was confirmed that the liquid revel on the nozzle tip end was surf with capillary wave and the particles of the liquid caused to break off a crest of the waves. …

    Dynamics and Design Conference : D & D 2015, "122-1"-"122-4", 2015-08-25

  • Poroelastic parameters of Berea sandstone containing water and CO<sub>2</sub> under conditions in geologic sequestration of CO<sub>2</sub>  [in Japanese]

    Watanabe Noriaki , Usui Yuto , Kizaki Akihisa , Sakaguchi Kiyotoshi

    … <p>Inversion techniques utilizing changes in elastic wave velocities, and tilt data of the ground surface, associated with migration of CO<sub>2</sub>, respectively, are promising options for short- and long-term monitoring in geologic sequestration of CO<sub>2</sub>. … by elastic wave velocity measurements, with maximizing safety by the capillary trapping mechanism.</p> …

    Journal of the Japanese Association for Petroleum Technology 80(5), 385-396, 2015

    J-STAGE 

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