Search Results 1-20 of 3940

  • Intermittent burst driving of Plasma actuator for reduction of drive time and improvement of aerodynamic performance  [in Japanese]

    藤林 大晶 , 大関 義弘 , 手塚 亜聖 , FUJIBAYASHI Hiroaki , OZEKI Yoshihiro , TEZUKA Asei

    流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2020オンライン (2020年9月28日-30日. 日本航空宇宙学会 : 宇宙航空研究開発機構(JAXA)オンライン会議)形態: カラー図版あり資料番号: AA2030013003レポート番号: JAXA-SP-20-008

    宇宙航空研究開発機構特別資料: 流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2020オンライン論文集 = JAXA Special Publication: Proceedings of Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2020 Online (JAXA-SP-20-008), 19-26, 2021-02-08

    IR 

  • Side-Wall Effects on the Global Stability of Swept and Unswept Supercritical Wings at Buffet Conditions

    SANSICA Andrea , 橋本 敦 , 小池 俊輔 , 河内 俊憲 , SANSICA Andrea , HASHIMOTO Atsushi , KOIKE Shunsuke , KOCHI Toshinori

    流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2020オンライン (2020年9月28日-30日. 日本航空宇宙学会 : 宇宙航空研究開発機構(JAXA)オンライン会議)形態: カラー図版あり資料番号: AA2030013015レポート番号: JAXA-SP-20-008

    宇宙航空研究開発機構特別資料: 流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2020オンライン論文集 = JAXA Special Publication: Proceedings of Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2020 Online (JAXA-SP-20-008), 109-118, 2021-02-08

    IR 

  • Detailed mechanism of self-excited vibration of a plate supported by air pressure  [in Japanese]

    TAKEDA Masakazu , WATANABE Masahiro

    … In the analysis, the unsteady fluid force acting on the plate surface is calculated based on the theory of two-dimensional leakage flow. … The model built in the dynamic stability analysis applies iterative calculation using a numerical solution to determine the floating displacement of the plate, its steady state, and the pressure and rate of air that flow through the bottom of the plate. …

    Transactions of the JSME (in Japanese) 87(897), 20-00395-20-00395, 2021

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  • Studies on Dynamics of Flexible Fibers in a Binary Fluid  [in Japanese]

    TANIGUCHI Takashi

    <p>工業的な高分子材料の多くは多成分系であり,様々な性質や形状を持つフィラーを添加することで材料の構造強化や新規機能の付与が行われている.高分子材料に繊維状や棒状微粒子を添加した場合,その密度や配向分布が材料物性に大きな影響を与える.そのため,高分子・微粒子分散系の相分離状態及び微粒子の凝集・配向挙動の予測・制御は非常に重要である.本研究では,一成分及び二成分流体中に分散した屈曲性繊 …

    Hosokawa Powder Technology Foundation ANNUAL REPORT 28(0), 55-63, 2021

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  • A STUDY ON THE EVALUATION OF COMFORT FOR PEDESTRIANS AND CYCLISTS CONSIDERING USERS' ACTIVITIES-A CASE OF ROAD SPACE REALLOCATION ON MIDOSUJI STREET IN OSAKA-  [in Japanese]

    KAWACHI Haruka , YOSHIDA Nagahiro

    <p>近年,都市交通手段として歩行や自転車の活用に注目が集まっている.大阪御堂筋では,道路空間を再配分するモデル整備事業が行われ,さらに滞留空間を設置する等の社会実験を実施することで快適な道路空間を模索中である.交通空間の快適性を表す指標にはLOSが挙げられるが,既存LOSでは通行者の快適性を十分に表現できていない.本研究では滞留空間に焦点を当て,滞留空間設置は通行者の快適性及び交通流 …

    Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management) 76(5), I_1073-I_1079, 2021

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  • Experimental study on the effect of the secondary vortex at trailing edge on response characteristics of the motion-induced vortex vibration for specific cross sections

    Cao Nade , Matsuda Kazutoshi , Kato Kusuo , Imamura Mitsushi , Yanase Tomoya

    … <p>In general, motion-induced vortex vibration is considered to be caused by the unification of the separated vortex from leading edge and the secondary vortex at trailing edge. …

    Journal of Structural Engineering, A 67A(0), 220-232, 2021

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  • Optical Diagnostics for Soot Formation Characteristics in Multi-phase Combustion Field Formed in a Simplified Flow Field  [in Japanese]

    HAYASHI Jun , HASHIMOTO Nozomu , AKAMATSU Fumiteru

    … <p>Soot formation characteristics in the multi-phase combustion (spray flame and pulverized coal jet flame) in a simplified flow field were evaluated using two-dimensional laser induced incandescence (LII) and time resolved LII (TiRe-LII). …

    Journal of the Combustion Society of Japan 63(203), 73-85, 2021

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  • Experimental results of the effect of gas composition on void fraction and bubble behavior for gas-liquid two-phase flow under stagnant water condition

    SAITO Miki , KANAI Taizo , NISHIMURA Satoshi , NISHI Yoshihisa

    … <p>Fission product removal by pool scrubbing is known to be largely affected by the gas-liquid two-phase flow regime. … The pool scrubbing performance of various carrier gases was evaluated in two-phase flow experiments by injecting helium, nitrogen, or argon through a pool of stagnant water in a column with an inner diameter of 0.5 m and a height of 8 m. … Measurements were conducted using a camera and two sets of a 128 × 128 wire-mesh sensors, separated by 40 mm. …

    Mechanical Engineering Journal, 2021

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  • An Open Sandwich Immunochromatography for Non-competitive Detection of Small Antigens

    HARADA Yoshitaka , OHMURO-MATSUYAMA Yuki , TSUNA Mika , UEDA Hiroshi

    … interchain interaction of separated variable region fragments (V<sub>H</sub> …

    Analytical Sciences 37(3), 455-459, 2021

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  • Separation of Dansyl-DL-Amino Acids Through Tube Radial Distribution Chromatography by Using a Commercially Available HPLC System with a Capillary Tube Manufactured for GC as a Separation Column

    SANADA Nobuyuki , TSUKAGOSHI Kazuhiko , TSUCHIYA Katsumi , HIROTA Ken , YAMASHITA Kenichi , MURATA Masaharu

    … <p>Dansyl-DL-amino acids were separated by tube radial distribution chromatography (TRDC) comprising a commercially available HPLC system, where open-tubular capillary tubes manufactured for capillary GC were used as the separation column. … The D- and L-enantiomers were separated and detected in this order through interaction between amino acids and -cyclodextrin by tube radial distribution flow in the TRDC system. …

    CHROMATOGRAPHY 42(1), 67-71, 2021

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  • Experimental Study on Effects of Gas-shielding in Lap-fillet Arc Welding  [in Japanese]

    TANAKA Manabu , YAMADA Tetsuo , SHIGETA Masaya , KOMEN Hisaya , FUKAHORI Mitsugi , SAITO Naoko

    … In order to clarify the relationship between the shielding gas flow and the shieldability during a lap-fillet arc welding, oxygen concentration measurements on a water-cooled copper which imitated a lap-joint in tungsten inert gas welding were conducted. … Moreover, the shielding gas flow and the high-speed plasma flow during the welding were visualized by the schlieren method and the observation method using a tube tungsten electrode and xenon gas, respectively. …

    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 39(1), 51-63, 2021

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  • COMPUTATIONAL FLUID DYNAMICS SIMULATION AND STABILITY ANALYSIS OF VEHICLE ON BRIDGE UNDER STRONG WINDS  [in Japanese]

    KIM Haeyoung , FUJINO Yozo , KATSUCHI Hiroshi , SIRINGORINGO Dionysius Manly , YAMADA Hitoshi , OHKOSHI Shuji

    <p> 本研究は,まず,Large Eddy Simulation (LES)により橋桁上にある車両の周辺流を再現し,車両に対する空気力を求め,次に,その空気力を用いた車両の動力学的安定解析から横転,横滑り,ヨーイング現象の発生限界風速を求めている.その結果,1)車両周りの流れ場は,橋桁の端部から剥離するせん断流の影響を強く受け,車両の車線位置により流れ場が大きく変わり,そのため車両に …

    Journal of Japan Society of Civil Engineers, Ser. A1 (Structural Engineering & Earthquake Engineering (SE/EE)) 77(1), 107-120, 2021

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  • Characterization of Cardiac- and Respiratory-driven Cerebrospinal Fluid Motions Using a Correlation Mapping Technique Based on Asynchronous Two-dimensional Phase Contrast MR Imaging

    Yatsushiro Satoshi , Sunohara Saeko , Tokushima Tetsuya , Takizawa Ken , Matsumae Mitsunori , Atsumi Hideki , Horie Tomohiko , Kajihara Nao , Kuroda Kagayaki

    … <p>Purpose: The cardiac- and respiratory-driven components of cerebrospinal fluid (CSF) motion characteristics and bulk flow are not yet completely understood. … The calculated delay time and correlation coefficients of the cardiac- and respiratory-driven velocity waveforms, separated in the frequency domain, were applied to evaluate the propagation of the CSF motion. …

    Magnetic Resonance in Medical Sciences, 2021

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  • O-25 Effect of additive concentration on sweating operation of pseudo-biodiesel fuel  [in Japanese]

    WATANABE Youta , KOMATSU Hiroyuki , YAMAGIWA Kazuaki , TAJIMA Hideo

    … BDF has a problem with cold flow properties due to the high melting point of saturated FAME in its constituents. … Separation of saturated FAME, which is a high melting point component, can improve low temperature flow characteristics and increase the use as a liquid fuel dramatically. … after solidifying all of the BDF samples, the melted liquid is separated from residue solid by melting operation at a constant temperature. …

    Proceedings of the Conference on Biomass Science 16(0), 53-54, 2021

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  • O-24 Effect of water addition on particle formation of fatty acid methyl esters at low temperature  [in Japanese]

    KAWAI Kosuke , KOMATSU Hiroyuki , YAMAGIWA Kazuaki , TAJIMA Hideo

    … <p>A winterization is a method for improving the cold flow properties of biodiesel fuel. … These particles could be easily separated by sieving. …

    Proceedings of the Conference on Biomass Science 16(0), 51-52, 2021

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  • Experimental Study of Sabo Dam Physical Measures Against Subsequent Sediment Flow Following Debris Flow Deposition

    KIM Yongrae , YAMADA Takashi

    … <p>Typical countermeasures against subsequent sediment flow following debris deposition include channel works and sand pockets ; … The objective of this study was to propose a novel method for capturing subsequent sediment flow following debris deposition at a sabo dam. … We installed three types of debris capture devices (subsequent sediment flow breaker, water-absorbing polymer, and sub-dam) to investigate their effects singly and in combination. …

    International Journal of Erosion Control Engineering 13(3), 56-63, 2021

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  • Effects of Naringin on the Proliferation and Osteogenic Differentiation of Canine Bone Marrow Stromal Cells <i>In Vitro</i>

    Zhang Jing , Xu Da-peng , Shang Jiang , Liang Xin-jie , Zhang Xue-bin

    … BMSCs were separated and cultured in vitro and identified by flow cytometry. …

    Journal of Hard Tissue Biology 30(1), 73-78, 2021

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  • Development of a Hot-Wire Anemometer Probe Specializing in Measuring the Boundary Layer of a Circular Cylinder  [in Japanese]

    KENCHI Toshiaki , HONMURA Shinji , YAMADA Makoto , KAWAI Masahito

    … The boundary layer and velocity shear layer that develop around a circular cylinder placed in a flow have a significant effect on lift and drag depending on whether it is laminar or turbulent. … The frequency analysis showed that the separated laminar shear layer transitioned to turbulent flow near the boundary with the separated region.</p> …

    Journal of the Japanese Society for Experimental Mechanics 20(4), 265-271, 2021

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  • High-speed fabrication of clear transparent cellulose nanopaper by applying humidity-controlled multi-stage drying method

    Li Chenyang , Kasuga Takaaki , Uetani Kojiro , Koga Hirotaka , Nogi Masaya

    … Drying experiments reveal that nanopaper's drying process can be separated into two periods. … For a conventional humidity-uncontrollable oven, a special air flow system is added. … The air flow system enables decrease of RH by removing water vapor at the water/air interface during the earlier period, thus fabricating clear transparent nanopaper in a relatively short time. …

    Nanomaterials 10(11), 2194, 2020-11-04

    IR 

  • Effect of large-scale structures on wall shear stress fluctuations in pipe flow

    Tong Tong , Bhatt Kovid , Tsuneyoshi Tatsuya , Tsuji Yoshiyuki

    … In this paper, particle image velocimetry and electrochemical measurements were applied simultaneously to examine the relationship between wall shear stress and the three-component velocity field in pipe flow. … Moreover, the large-scale motions in the velocity field were separated into very-large-scale motions (VLSMs) and large-scale motions (LSMs) to investigate their respective influences on the wall shear stress fluctuations. …

    Physical Review Fluids 5(10), 104601, 2020-10

    IR 

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