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A Study of Movement of the Liquid-Liquid Interface and Mass Transfer through it 液-液界面运动及其传质研究
Transaction of The Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.21.45
T. Katayama, K. Imamura, Toru Sato, R. Jung, Y. Tsuchiya
{"title":"A Study of Movement of the Liquid-Liquid Interface and Mass Transfer through it","authors":"T. Katayama, K. Imamura, Toru Sato, R. Jung, Y. Tsuchiya","doi":"10.3154/TVSJ.21.45","DOIUrl":"https://doi.org/10.3154/TVSJ.21.45","url":null,"abstract":"To understand the dynamic mechanics of a droplet in the still water, two-phase CFD simulations are carried out together with flow visualization and PIV measurements. Our CFD method incorporates a MAC-type NS solver and a front capturing technique by using the maker density function. The CFD method indicates the defomation, zigzag trajectory and the vortex shedding from it, each of which is compared well with the measurements. The method also presents the mass transfer at the interface of a droplet and the resultant Sherwood number agrees well with the solution of an experimental equation.","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"81 6 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":"123219656","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
The Fundamental Study About Flow Visualized Observation by use of a Towing Water Tank Vortex Shedding from a Bluff Cylinder 拖曳水箱钝形圆筒涡落流可视化观测的基础研究
Transaction of The Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.28.33
Y. Yokoi, K. Hirao
{"title":"The Fundamental Study About Flow Visualized Observation by use of a Towing Water Tank Vortex Shedding from a Bluff Cylinder","authors":"Y. Yokoi, K. Hirao","doi":"10.3154/TVSJ.28.33","DOIUrl":"https://doi.org/10.3154/TVSJ.28.33","url":null,"abstract":"曳航水槽を用いて柱状物体からの渦放出の様子を可視化観測する際の渦放出周波数の計測精度や再現性，柱状物体の投影幅に対する水槽の幅や水位，水の静置時間などの実験環境の影響について検討した．その結果，渦の計測に個人差は無く10個程度の計数でも精度的には差し障りのないこと，渦の計数が可能な範囲ならトレーサ浸出量の影響は無いこと，水の静置時間は10分程度で良いことなどが明らかになった．また，流路幅と水位は渦放出周波数に対し多大な影響を与える因子であることや，断面形状によらずその傾向は同じであることが知れた．","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"21 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":"117138443","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
Pattern Extraction and Visualization of Walking Routes as Sequences of Characters 字符序列行走路径的模式提取与可视化
Transaction of The Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.38.7
Yuri Miyagi, M. Onishi, Chiemi Watanabe, T. Itoh, M. Takatsuka
{"title":"Pattern Extraction and Visualization of Walking Routes as Sequences of Characters","authors":"Yuri Miyagi, M. Onishi, Chiemi Watanabe, T. Itoh, M. Takatsuka","doi":"10.3154/TVSJ.38.7","DOIUrl":"https://doi.org/10.3154/TVSJ.38.7","url":null,"abstract":"People flow information brings us useful knowledge in various industrial and social fields including traffic, (cid:3) disaster prevention and marketing. However, it is still an open problem to develop effective people flow analysis techniques. We suppose compression and data mining techniques are especially important for analysis and visualization of large-scale people flow datasets. This paper presents a visualization tool for large-scale people flow dataset featuring compression and data mining techniques. This tool firstly compresses the people flow datasets using UniversalSAX, an extended method of SAX (Symbolic Aggregate Approximation). Next, we apply natural language algorithms to extract movement patterns. Applying Weighted Levenshtein Distance as dissimilarity between walking routes, we can compare features of each walking route and classify moving patterns. Finally, we visualize walking routes of people flow and extracted features to represent popular walking routes and congestions. Users can choose over view","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"38 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":"130757527","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
Bubble Forming Behavior of High Viscous Fluid under Rapid Decompression 高粘性流体在快速减压下的气泡形成行为
Transaction of The Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.28.27
H. Fujii, A. Fujiwara, N. Wakabayashi, Y. Abe
{"title":"Bubble Forming Behavior of High Viscous Fluid under Rapid Decompression","authors":"H. Fujii, A. Fujiwara, N. Wakabayashi, Y. Abe","doi":"10.3154/TVSJ.28.27","DOIUrl":"https://doi.org/10.3154/TVSJ.28.27","url":null,"abstract":"火山噴火は大規模な自然現象であり，特に噴火が爆発的である場合の人的被害は大きいため防災のための噴火予測が極めて重要となる．しかし，現段階では噴火のメカニズムが十分に解明されていないため，噴火を予測するための十分発達したシステムは存在しない．近年では急減圧によりマグマ内に溶解していた揮発性物質が析出し火山噴火となる一連の現象が衝撃波管モデルと類似するとし，これに基づいた様々な解析や実験が進められている．しかし，非定常な気泡生成や成長挙動などといった素過程物理についての知見が不足しており，噴火についての十分な理解には至っていない．","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"30 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":"123716546","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
Passive Control of Non-equilibrium Condensation in Prandtl-Meyer Expansion Fan Using the Slotted Wall with Cavity 用带腔的开槽壁被动控制普朗特-梅耶膨胀风机非平衡冷凝
Transaction of The Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.25.27
Masanori Tanaka, S. Matsuo, T. Setoguchi, K. Kaneko
{"title":"Passive Control of Non-equilibrium Condensation in Prandtl-Meyer Expansion Fan Using the Slotted Wall with Cavity","authors":"Masanori Tanaka, S. Matsuo, T. Setoguchi, K. Kaneko","doi":"10.3154/TVSJ.25.27","DOIUrl":"https://doi.org/10.3154/TVSJ.25.27","url":null,"abstract":"水蒸気や湿り空気などの凝縮性気体が，超音速ノズルで急激に加速膨張する際に生ずる非平衡凝縮現象は蒸気タービンにおいても生じることがわかっており，特に低圧段における翼列間流路内で凝縮が生ずるとその性能は低下する．また，蒸気タービン低圧段における翼腹面の後流からの流れは凸面の角の流れに類似しており，結果として膨張波(プラントル・マイヤー膨張扇)内では凝縮衝撃波を伴う凝縮流れが発生することになる．このような流れは後流にも影響を及ぼすと考えられるため，流れ場の詳細を調べることは重要であると考えられる． 本研究は，プラントル・マイヤー膨張扇内で生ずる非平衡凝縮流れに及ぼすパッシブコントロールの効果を明らかにすることを目的とする．なお，プラントル・マイヤー膨張扇内で定常と非定常凝縮衝撃波が生ずる場合にそれらに及ぼすパッシブコントロールの効果を実験的，または数値的に調べた．","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"56 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":"122916785","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
Aerodynamic Noise and Flow Visualization around Two-dimensional Airfoil 二维翼型周围的气动噪声和流动可视化
Transaction of The Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.21.123
N. Fujisawa, S. Shibuya, A. Nashimoto, Tsuyoshi Takano
{"title":"Aerodynamic Noise and Flow Visualization around Two-dimensional Airfoil","authors":"N. Fujisawa, S. Shibuya, A. Nashimoto, Tsuyoshi Takano","doi":"10.3154/TVSJ.21.123","DOIUrl":"https://doi.org/10.3154/TVSJ.21.123","url":null,"abstract":"The aerodynamic noise from a two-dimensional symmetrical airfoil was studied experimen-tally using a low-noise acoustic wind tunnel. The measurement of the sound spectrum at Reynolds number 1.6 × 10 5 indicates the generation of discrete frequency noise from the airofoil at small incidence angles. The surface flow visualizations over the airofoil were carried out using the oil-film method and the shear-sensitive liquid crystal technique. These visualization results indicate that the reattachment and reseparation of the flow occur near the trailing edge of the pressure side of the airfoil, when the discrete frequency noise is generated. The smoke-wire visualization of the flow around the airfoil showed that the strong trailing edge vortices were shed from the airofoil and they form a stable pattern of Karman vortices in the downstream.","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"54 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114002235","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: 10
Effect of Different Oscillating Center on Propulsive Force during Monofin Oscillation 不同摆动中心对单鳍摆动推进力的影响
Transaction of The Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.37.32
T. Haniu, H. Hasegawa, H. Takagi
{"title":"Effect of Different Oscillating Center on Propulsive Force during Monofin Oscillation","authors":"T. Haniu, H. Hasegawa, H. Takagi","doi":"10.3154/TVSJ.37.32","DOIUrl":"https://doi.org/10.3154/TVSJ.37.32","url":null,"abstract":"モノフィン振動時の中心角の違いが推進力に与える影響 羽二生 稔大 1),長谷川 裕晃 2),高木 英樹 3) Effect of Different Oscillating Center on Propulsive Force during Monofin Oscillation Toshihiro HANIU, Hiroaki HASEGAWA and Hideki TAKAGI ABSTRACT The monofin swimmer uses the body to undulate waves towards the monofin, like a dolphin kick. Therefore, the vortex dynamics around a monofin must be considered to estimate the unsteady propulsive force of a monofin. The aim of this study was to elucidate the relationship between propulsive forces and the unsteady flow structure around a monofin with the different oscillating center. The experiments were carried out at the oscillating center αc = 0, -10, -20°. The oscillation was performed using a driver unit of the monofin set in a circulating water flume. To measure the three-dimensional flow fields, a stereoscopic PIV method was applied to the several plane in the downstream of the monofin. The propulsive force during one oscillating cycle at αc = 0° is largest among the three case. The strength of vortex ring and its inclination with respect to the free-stream direction is important to the propulsive force generation.","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"4 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":"114887603","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
Visualizing Change of Feelings in"Hakai" by Shimazaki Toson 岛崎东臣《Hakai》中感受变化的形象化
Transaction of The Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/tvsj.30.25
M. Inami, Yoshifuru Saito, K. Horii
{"title":"Visualizing Change of Feelings in\"Hakai\" by Shimazaki Toson","authors":"M. Inami, Yoshifuru Saito, K. Horii","doi":"10.3154/tvsj.30.25","DOIUrl":"https://doi.org/10.3154/tvsj.30.25","url":null,"abstract":"本稿の目的は島崎藤村作『破戒』における封建的な旧社会と自己解放された新社会に生きる登場人物のそれぞれの感情の変化を検証することである． 要素として「世間」，「社会」，「世の中」の三つの語を選び，章ごとの使用頻度を新社会と旧社会とに分けて調べた．得られたデータへ離散値系ウェーブレット多重解像度解析を適用した． その結果，「世間」の頻出度合いの変化にはほぼ同様の傾向が見られ，双方ともに日本の古来から使用されている語「世間」と「世の中」に対する共通認識があることが確認された．新社会の登場人物が自己の考えを主張する場合「社会」が多くなるが，旧社会における「社会」の語は新社会に対抗したり，批判したりする時に多くなり，「世間」としての立場を主張するために「社会」を援用していることが示された．立場を主張する上で語の選択に大きな意味があることが明らかとなった．","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"60 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":"114917361","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
Vortex Motion of Transitional Swirling Flows in a Rectangular Channel 矩形通道内过渡旋流的涡旋运动
Transaction of The Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.21.79
K. Matsuzaki, Mizue Munekata, H. Ohba
{"title":"Vortex Motion of Transitional Swirling Flows in a Rectangular Channel","authors":"K. Matsuzaki, Mizue Munekata, H. Ohba","doi":"10.3154/TVSJ.21.79","DOIUrl":"https://doi.org/10.3154/TVSJ.21.79","url":null,"abstract":"The purpose of this study is to make clear the behavior of the swirling pipe flows with non-circular section. Transitional swirling flows in a rectangular channel with aspect ratio of 1.3 and a short channel length, which is one of typical pipe flow with non-circular section, were investigated experimentally and numerically. In this experiment with water circulation flow, LDV measurement system was used in order to obtain the mean velocity fields and turbulent quantities. The flow visualization of the swirling flows was carried out in order to understand the oscillating motion of vortex core. Also, large eddy simulation of the flow fields was made at the same conditions as the experimental ones. As results of these investigations, the computational results showed good agreement with experimental ones quantitatively, it was found that the vortex core region moves to the swirling direction with deformation and interactions of secondary flow at the corners.","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"5 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":"121743227","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
Measurement of microdroplet formation process using multicolor confocal micro PIV 用多色共聚焦微PIV测量微液滴形成过程
Transaction of The Visualization Society of Japan Pub Date : 1900-01-01 DOI: 10.3154/TVSJ.30.55
M. Oishi, M. Oshima, H. Kinoshita, T. Fujii, Toshio Kobayashi
{"title":"Measurement of microdroplet formation process using multicolor confocal micro PIV","authors":"M. Oishi, M. Oshima, H. Kinoshita, T. Fujii, Toshio Kobayashi","doi":"10.3154/TVSJ.30.55","DOIUrl":"https://doi.org/10.3154/TVSJ.30.55","url":null,"abstract":"マイクロ流体デバイスで主に用いられるマイクロ混相流は、それぞれの相間の相互作用を利用して様々な機能を実現している。本研究ではより効率的なデバイスの開発や性能評価に必要な定量的計測手法の確立を目指し、異なる相の流動構造を同時かつ別々に計測することができる多波長共焦点マイクロPIVシステムを新たに構築し、マイクロ混相流における両相の定量的同時計測を試みた。 本研究ではT字ジャンクションにおけるマイクロ液滴生成過程を計測対象とし、油に分散する自作蛍光粒子を開発するなどして、混ざり合わない油相と水相の同時計測に成功した。粘性力と界面張力の比であるキャピラリ数に依存した生成過程の違いを時系列でPIV計測した結果、過去の論文が示した定性的パラメータスタディや生成過程の巨視的観察に基づく考察に対し、両相の流動構造の過渡変化という視点から新たな考察を得ることができ、マイクロ混相流の解明に本手法が有効な手段となりうることを示した。","PeriodicalId":226842,"journal":{"name":"Transaction of The Visualization Society of Japan","volume":"188 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":"115704922","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
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