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Bubble Wake Visualization by using Photochromic Dye 利用光致变色染料可视化气泡尾迹
Transaction of The Visualization Society of Japan Pub Date : 2007-12-01 DOI: 10.3154/TVSJ.27.47
T. Sanada, Minori Shirota, Tomoki Ono, Masaomi Watanabe
{"title":"Bubble Wake Visualization by using Photochromic Dye","authors":"T. Sanada, Minori Shirota, Tomoki Ono, Masaomi Watanabe","doi":"10.3154/TVSJ.27.47","DOIUrl":"https://doi.org/10.3154/TVSJ.27.47","url":null,"abstract":"ジグザグもしくはらせん運動を行う上昇気泡の後流について，実験的に調査した．単一の気泡をシリコンオイル中に発生させ，その後流をフォトクロミック染料を用いることで可視化した．気泡の挙動と後流は，高速度ビデオカメラを用いて同時にステレオ撮影した．その結果，気泡がらせん運動を開始する際には，ダブルスレッド型と思われる二本の渦構造が観察された．また気泡が形状振動を伴いながらジグザグ運動を行う際には，複数の馬蹄形の渦構造が観察された．","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121031339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 56
Time Series of Consecutive PIV Analyses on a Pulsating Jet 脉动射流连续PIV分析的时间序列
Transaction of The Visualization Society of Japan Pub Date : 2007-07-01 DOI: 10.3154/jvs.27.supplement1_87
菖蒲 和晃, 舟木 治郎, 平田 滕哉
{"title":"Time Series of Consecutive PIV Analyses on a Pulsating Jet","authors":"菖蒲 和晃, 舟木 治郎, 平田 滕哉","doi":"10.3154/jvs.27.supplement1_87","DOIUrl":"https://doi.org/10.3154/jvs.27.supplement1_87","url":null,"abstract":"ABSTRACT Pulsating jets are very common and sometimes useful in industrial fields, due to some differences in basic characteristics from steady jets. In this research, the authors focuse upon the frequency effect of pulsation on a circular jet. Experiments are conducted at a Reynolds number of 5,000, Strouhal numbers of 0.13, 0.20 and 0.27, and a velocity-amplitude ratio of 0.5. Using olive-oil smoke, the authors visualise the flow near a nozzle exit, and get quantitative information by a PIV technique. Measurements on the entrainment flow rate give us another specific flow information, on which we discuss the frequency effect.","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"52 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133351815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
『源氏物語』における源氏と空蝉の恋 : 離散値系ウェーブレット多重解像度解析 《源氏物语》中的源氏与空蝉之恋:离散值系小波多重分辨率解析
Transaction of The Visualization Society of Japan Pub Date : 2005-07-31 DOI: 10.3154/TVSJ.25.8
井波 真弓, 岩崎 晴美, 宮沢 賢治, 土屋 宏之, 齋藤 兆古, 堀井 清之
{"title":"『源氏物語』における源氏と空蝉の恋 : 離散値系ウェーブレット多重解像度解析","authors":"井波 真弓, 岩崎 晴美, 宮沢 賢治, 土屋 宏之, 齋藤 兆古, 堀井 清之","doi":"10.3154/TVSJ.25.8","DOIUrl":"https://doi.org/10.3154/TVSJ.25.8","url":null,"abstract":"","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127874916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Development of an Interactive Visualization System for the Taylor-Couette Flow Taylor-Couette流交互式可视化系统的开发
Transaction of The Visualization Society of Japan Pub Date : 2004-09-15 DOI: 10.3154/tvsj.25.45
H. Furukawa, Yasuyuki Kobayashi, Takashi Watanabe, I. Nakamura
{"title":"Development of an Interactive Visualization System for the Taylor-Couette Flow","authors":"H. Furukawa, Yasuyuki Kobayashi, Takashi Watanabe, I. Nakamura","doi":"10.3154/tvsj.25.45","DOIUrl":"https://doi.org/10.3154/tvsj.25.45","url":null,"abstract":"3次元の可視化は流れの構造を理解するための重要な方法です．本研究では，低アスペクト比のテイラー・クエット流れにおいて，任意の複数受動粒子の動きを追跡することができる可視化システムの構築を目指す．対象とする2重円筒は有限長であり，内円筒が回転し，外円筒が静止している．上下端面は固定端面とする．用いる速度データは，流れが十分に発達し定常状態に落ち着いた時刻におけるデータを用いている．スタガード格子を用いて，3次元空間上で補間するアルゴリズムを開発し，粒子を追跡することに成功した．ユーザーは，追跡開始点，時間刻み幅等を可視化操作ウィンドウ上において変更することができる．流跡線の描画後やアニメーション中に，ユーザーはマウス操作をすることにより視点を変えることができる．","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121671117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Large-Scale Streaming Caused by Forced Vertical, Cyclic Motion of Fluid-Fluid Interface: Interface Wave Profile and Overall Flow Behavior 由流体-流体界面强迫垂直循环运动引起的大规模流动:界面波剖面和整体流动行为
Transaction of The Visualization Society of Japan Pub Date : 2004-07-31 DOI: 10.3154/TVSJ.24.9
J. Shimizu, H. Nakayama, T. Ito, Y. Tsuji, Y. Kukita
{"title":"Large-Scale Streaming Caused by Forced Vertical, Cyclic Motion of Fluid-Fluid Interface: Interface Wave Profile and Overall Flow Behavior","authors":"J. Shimizu, H. Nakayama, T. Ito, Y. Tsuji, Y. Kukita","doi":"10.3154/TVSJ.24.9","DOIUrl":"https://doi.org/10.3154/TVSJ.24.9","url":null,"abstract":"Large-scale streaming can occur near the interface between immiscible liquids when the liquids are excited vertically within a cylindrical enclosure. The most significant feature of this phenomenon is formation of an intermittent, but unidirectional, jet-like flow that leaves the center of the interface when an axisymmetric, fundamental-mode wave is exited on the interface. The jet induces a large-scale recirculating flow extending a few cylinder diameters away from the interface, a spatial scale considerably greater than the wavelength or amplitude of the interface waves, and having a time scale much greater than the excitation inter-val. The depth of the recirculation region increases with an increase in the wave amplitude. The recirculating flow is driven by a downward jet that forms below the center of the interface. The downward jet persists because a stagnation point forms below the interface each time when the center of interface is rising to form a crest.","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127269248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Non-Invasive Cerebral Perfusion Imaging Using Magnetic Resonance : Focused on Arterial Spin Labeling 磁共振无创脑灌注成像:聚焦动脉自旋标记
Transaction of The Visualization Society of Japan Pub Date : 2004-07-01 DOI: 10.3154/jvs.24.174
Tokunori Kimura
{"title":"Non-Invasive Cerebral Perfusion Imaging Using Magnetic Resonance : Focused on Arterial Spin Labeling","authors":"Tokunori Kimura","doi":"10.3154/jvs.24.174","DOIUrl":"https://doi.org/10.3154/jvs.24.174","url":null,"abstract":"脳血流空間分布の測定およびその可視化 は,現 在でも 死因の第3位 を占める脳卒中の診断1)などの臨床医学の みな らず,脳 の基本的な機能を調べ る精神医学や運動機 能など低次か ら言語理解などの高次の脳機能を調べる心 理学 にまで広 く応用 されてお り,非 常に重要 なテーマと なっている.後 者 の用途 にはfunctional-MRI(f-MRI)8) としてすでに広 く用いられているが,近 年注 目されてい る方法に磁気共鳴(MRI)を 用いて生体内の水を磁気的 にラベ リングす ることによ り,非 侵襲的かつ簡便に血流 画像 を得ることが可能なArterial Spin Labeling(ASL) 法がある.血 流 イメージングに関 しては他のモダリティ やMRIの みで も多様 な方法論があることか ら,ま ず導 入部 として既に報告 され一般化 している内容について総 論的に説明 し,次 にASL法 に関 し著者 らが研究 して き た方法の詳細 について論述 した.ASL法 における血流 量の定量化に関 してはいまだ発展途上にあるため,特 に 定量化に関して工学的な方法論の上から検討 した成果を まとめた.","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121528732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
自由浮上気泡流中に生じる気泡間相互作用の3-D PTV計測 自由上浮气泡流中气泡间相互作用的3-D PTV测量
Transaction of The Visualization Society of Japan Pub Date : 2003-07-31 DOI: 10.3154/TVSJ.23.1
祐一 村井, 正明 石川, 将彰 芦原, 甲輔 衣川, 山本 富士夫
{"title":"自由浮上気泡流中に生じる気泡間相互作用の3-D PTV計測","authors":"祐一 村井, 正明 石川, 将彰 芦原, 甲輔 衣川, 山本 富士夫","doi":"10.3154/TVSJ.23.1","DOIUrl":"https://doi.org/10.3154/TVSJ.23.1","url":null,"abstract":"気泡流中では気泡どうしが接近すると，気泡間相互作用が発生する．これに関しては，従来まで数値解析によって整理が試みられているが，あらゆる距離と方向で包括的に実測した例はない． 本研究では，3-D PTV(3次元粒子追跡型流速測定法)を気泡群の計測に応用し，Re=10の条件に対する3次元的な2気泡間の相互作用を検出した． 気泡間相互作用は，気泡の平均上昇速度に対して微弱な変動成分であるとともに，気泡を全数計測しなければ正確な計測ができない．このため気泡像に対するテンプレートマッチング法によるラベリング，許容誤差をあたえたステレオマッチングを利用するなど，工夫を行った． 結果より，鉛直方向に接近速度，水平方向に離間速度，斜め方向に捻り速度が生じることがわかった． このうち斜め方向に関する相互作用は，従来の数値解析では予測されておらず，本実験結果からの新しい知見である．","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116781918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
直方体周り流れの PIV・LDA 計測 长方体周流的PIV、LDA测量
Transaction of The Visualization Society of Japan Pub Date : 2003-07-31 DOI: 10.3154/TVSJ.23.31
友和 野村, 経章 石間, 富夫 小保方
{"title":"直方体周り流れの PIV・LDA 計測","authors":"友和 野村, 経章 石間, 富夫 小保方","doi":"10.3154/TVSJ.23.31","DOIUrl":"https://doi.org/10.3154/TVSJ.23.31","url":null,"abstract":"本研究では，もっとも基本的な流れの一つである平板上に置かれた直方体周り(長さ65mm×幅58mm×高さ31mm)の流れを，PIV(particle image velocimetry)と二次元LDA(laser Doppler anemometer)を用いて測定した．本研究では主流平均流速は4.0m/s，相対乱れ強さ1.5%として実験を行った．両者の比較は，平均流速，乱れ強さ及びレイノルズ応力について行い，乱流特性や測定精度の相互検証を行った．また，LDA測定におけるカルマン渦のような低周波数の流速変動の影響，PIV測定での検査領域の大きさが測定結果に与える影響に関しても調べた．さらに，PIVにより得られる瞬時流速分布に対してレイノルズ分解，Galilean分解，渦度表示などを適用することで直方体周り流れの瞬時の渦構造を解析した．","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"875 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133765130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Flow Pattern in a Simulated Tube-Nested Combustor 模拟管内嵌套燃烧室的流动模式
Transaction of The Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.22.15
R. Matsumoto, Yoshitomo Shintani, M. Okada, Keizo Imahori, T. Ohnishi, I. Ishihara, M. Ozawa
{"title":"Flow Pattern in a Simulated Tube-Nested Combustor","authors":"R. Matsumoto, Yoshitomo Shintani, M. Okada, Keizo Imahori, T. Ohnishi, I. Ishihara, M. Ozawa","doi":"10.3154/TVSJ.22.15","DOIUrl":"https://doi.org/10.3154/TVSJ.22.15","url":null,"abstract":"","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121810228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Interface Measurement of Moving Objects by Using a Fast X-ray CT Scanner 用快速x射线CT扫描仪测量运动物体的界面
Transaction of The Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.21.38
M. Misawa, N. Takada, N. Ichikawa, M. Akai
{"title":"Interface Measurement of Moving Objects by Using a Fast X-ray CT Scanner","authors":"M. Misawa, N. Takada, N. Ichikawa, M. Akai","doi":"10.3154/TVSJ.21.38","DOIUrl":"https://doi.org/10.3154/TVSJ.21.38","url":null,"abstract":"Measurement accuracy of a fast-scanning X-ray CT, designed to measure the unsteady void fraction and the interface area in multi-phase flow, was evaluated with spherical and cylindrical acrylic phantoms of known dimensions. Limitations of the spatial resolution and the object velocity were examined from the velocity and dimensions of the phantoms, X-ray fan beam thickness, and the scanning speed. Measurement errors less than 5% can be achieved by appropriate selection of the threshold level in binary images for stationary objects. However, the errors exceed over 20% for spherical objects moving at 1.0m/s. Another phantom simulating a unit of slug bubble frequently seen in multi-phase flow was scanned with the fast X-ray CT and its profile was compared with the phantom's actual dimensions. The results showed the system's successfull capability to reproduce the cylindrical part, while a further improvement is required to resolve detailed interface structure at the rear end of the phantom moving at large velocities.","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117131925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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