Search Results 1-20 of 256

  • TEMPORAL VARIATION OF CARBON DIOXIDE FLUX ON OMAEHAMA IN INNER PART OF OSAKA BAY  [in Japanese]

    大谷 壮介 , 上月 康則 , 松重 摩耶 , 山中 亮一

    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_1015-1020, 2019

  • Effects of Casting Surface on Correlation between Eddy Current Signal and Pearlite Area Ratio in Eddy Current Testing of Ductile Cast Iron  [in Japanese]

    Horikawa Noritaka , Wang Lin

    … Thus, a nondestructive estimation method for casting is required. … This research investigated effects of casting surface on the eddy current evaluation of ductile cast iron matrix. … Eddy current testing and microstructure observation were performed on both the machined surface and casting surface. … Pearlite ratio showed good correlation with the eddy current signals measured on the machined surface. …

    Journal of Japan Foundry Engineering Society 91(12), 850-855, 2019

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  • TEMPORAL VARIATION OF CARBON DIOXIDE FLUX ON OMAEHAMA IN INNER PART OF OSAKA BAY  [in Japanese]

    OTANI Sosuke , KOZUKI Yasunori , MATSUSHIGE Maya , YAMANAKA Ryoichi

    … flux and water quality using eddy correlation method at Omaehama beach in the inner part of Osaka Bay was conducted in this study. … There was no strong correlation CO<sub>2</sub> …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 75(2), I_1015-I_1020, 2019

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  • Effect of Ships on Wind Flow in Ocean Wind Measurements Using a Numerical Simulation

    Suzuki Naoya , Michioka Takenobu , Konda Masanori , Kutsuwada Kunio , Masuda Yuji

    … gas flux are calculated in field observation using the eddy correlation method, which simultaneously measures the horizontal and vertical wind components. …

    Journal of Advanced Marine Science and Technology Society 25(1), 1-14, 2019

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  • Back Trajectory Analysis of Pathline for Strong Wind within Pedestrian Space based on LES Database  [in Japanese]

    Okaze Tsubasa , Kikumoto Hideki , Ikegaya Naoki

    … In this study, we conducted LES of the flow field around an isolated building and analyzed the cross-correlation between the wind speed fluctuation in the windward of the building and the pedestrian height around the building. … Then, we focused on a strong wind event in the side of the building and applied a back trajectory method to estimate pathline of the strong wind in the side of the building. …

    Summaries to Technical Papers of Annual Meeting, Japan Association for Wind Engineering 2019(0), 175-176, 2019

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  • LES EVALUATION OF WIND LOADS ON A FLAT PLATE ROOF BASED ON VALIDATION WITH COMPLEX POD ANALYSIS  [in Japanese]

    NAKAMURA Ryohei , TANIGUCHI Tetsuro

    … For wind-resistant design of buildings, it is required to predict accurately the peak wind loads, and the Large Eddy Simulation (LES) effective in obtaining approximately equivalent evaluation of wind loads on the buildings in urban areas to the results obtained in wind tunnel experiments. … On the other hand, wind pressures on each part of structures fluctuate with some correlation mutually. …

    Journal of Structural and Construction Engineering (Transactions of AIJ) (743), 23-33, 2018-01

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  • Cholesky decomposition-based generation of artificial inflow turbulence including scalar fluctuation

    大風 翼 , Okaze Tsubasa , Mochida A , Mochida A

    … a b s t r a c t This paper proposes a new method for generating turbulent fluctuations in wind velocity and scalars, such as temperature and contaminant concentration, based on a Cholesky decomposition of the time-averaged turbulent flux tensors of the momentum and the scalar for inflow boundary condition of large-eddy simulation (LES). …

    Computers & Fluids (159), 23-32, 2017-12

    IR 

  • Large-eddy simulation of airflow over complex terrain and application to the wind turbine safety management  [in Japanese]

    川島 泰史 , 内田 孝紀

    … To examine into the failure analysis method based on numerical wind loads, numerical wind simulation based on large-eddy simulation (numerical wind diagnosis) was conducted for the wind directions that have been identified. … The research focused especially on the 3D air flow structure and wind load characteristics of east wind, which showed the largest impact from terrain-induced turbulence and north wind that showed the least impact and studied the correlation with actual measurement data. …

    九州大学応用力学研究所所報 (153), 96-103, 2017-09

    IR 

  • Exhalation Through Nose Therapy for Postoperative Recurrence of Eosinophilic Chronic Rhinosinusitis: CFD Analysis for Aerosol Transport Characteristics in Nasopharynx  [in Japanese]

    Yamamoto Takahisa , Kobayashi Yoshiki , Asako Mikiya , Tomoda Kohichi

    … The mechanism of how ETN improves ECRS with asthma is still controversial even though ETN gets a lot of attention as a treatment method for ECRS with asthma. … This study used both a Euler-Lagrange particle transport model for aerosol transport and a Large Eddy Simulation model for complex intranasal turbulent flow, which are able to account for the transient transport of mass and turbulent energy, and consequently, provides highly accurate predictions of the amount of flow separation under adverse pressure gradients. …

    The Journal of Japan Society for Infection and Aerosol in Otorhinolaryngology 5(1), 15-19, 2017

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  • Effect of Observation Tower on Wind Flow over the Ocean—First Assessment of the Applicability of Numerical Simulation Using CFD—

    Suzuki Naoya , Waseda Takuji , Michioka Takenobu , Tatsumi Kosuke , Takemoto Takeshi

    … To develop a model of <i>C</i><sub>D</sub>, measurements of wind stress are necessary, and the wind stress needs to be calculated using the eddy-correlation method, which measures the horizontal and vertical wind components. … Therefore, a numerical simulation is a better method to select installation locations where the wind stress can be measured with high precision, by excluding the effect of the platform. …

    Journal of Advanced Marine Science and Technology Society 23(1), 11-19, 2017

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  • ELUCIDATION DYNAMICS OF CARBON DIOXIDE FLUX ON SALT MARSH  [in Japanese]

    OTANI Sosuke , MARIKAWA Junpei

    … flux using eddy correlation method at reed marsh in Yodo river. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 73(2), I_1303-I_1308, 2017

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  • Observation of mean and fluctuating wind speed in urban area by using doppler lidar  [in Japanese]

    Kishida Takeshi , Yoshie Ryuichiro , Miyashita Koichi , Sasaki Ryoji

    … Next, in order to classify the vertical profile of the wind speed, we calculated atmospheric stability parameters by eddy correlation method using observed fluctuating temperature and fluctuating wind velocity data by the ultrasonic anemometer. …

    PROCEEDINGS OF NATIONAL SYMPOSIUM ON WIND ENGINEERING 24(0), 19-24, 2016

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  • SEASONAL DYNAMICS OF THE CO<sub>2</sub> FLUX IN BRACKISH SALT MARSH  [in Japanese]

    OTANI Sosuke , MARIKAWA Junpei , KAWASAKI Taiki , TANAKA Koichi

    … flux by eddy correlation method observed 0.90 mgCO<sub>2</sub>/m<sup>2</sup>/s in the daytime on spring and reed salt marsh absorbed CO<sub>2</sub>. … detected by bulk method constantly emitted at water surface in all season. … emission rate in sediment measured by chamber method were high on spring and autumn. …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 72(2), I_1441-I_1446, 2016

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  • multi-scale water use in dry land  [in Japanese]

    gu daxing , Sonobe Rei , Wang Quan

    [in Japanese]

    The Japanese Forest Society Congress 127(0), 387, 2016

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  • Study on Magnetic Property Change on Neutron Irradiated Austenitic Stainless Steel  [in Japanese]

    NEMOTO Yoshiyuki , OHISHI Makoto , ITO Masayasu , KAJI Yoshiyuki , KEYAKIDA Satoshi

    … Authors previously reported that magnetic data obtained by using Eddy current method and ACmagnetization method showed correlation with the increase of susceptibility of the irradiation assistedstress corrosion cracking (IASCC) on neutron irradiated austenitic stainless alloy specimens. …

    Maintenology 14(4), 83-90, 2016

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  • Seasonal Variation in Heats and CO<sub>2</sub> Fluxes from a Cool-teperate Decidious Broadleaved Forest  [in Japanese]

    Nonaka Shohei , Kosaka Izumi , Akutsu Hitomi , Ashiba Yayoi , Takagi Maiko , Matsui Takumu , Yamaguchi Yukino , Takizawa Hideki , Abe Kazutoki

    [in Japanese]

    The Japanese Forest Society Congress 126(0), 222, 2015

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  • Non-destructive Fatigue Evaluation for Iron-based Structural Metallic Material under Pulsating Tension Stress Using the Magnetic Method

    OKA Mohachiro , YAKUSHIJI Terutoshi , ENOKIZONO Masato

    … We have already proposed the fatigue evaluation method for steel by measuring an inductance of a pancake-type coil using an LCR meter. … In the case of low carbon steel, pulsating tension fatigue was evaluated using the inductance method. … In the case of steel such as SS400, pulsating tension fatigue was evaluated using the inductance method on both conditions when the dc magnetic field was not applied when the dc magnetic field was applied. …

    Journal of the Japan Society of Applied Electromagnetics and Mechanics 23(4), 654-658, 2015

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  • LARGE EDDY SIMULATION OF THE GUST FACTOR USING LATTICE BOLTZMANN METHOD WITHIN A HUGE AND HIGH RESOLUTION URBAN AREA OF TOKYO  [in Japanese]

    AHMAD Nurul Huda , INAGAKI Atsushi , KANDA Manabu , ONODERA Naoyuki , AOKI Takayuki

    … In order to understand the situation, a large eddy simulation (LES) over a huge and high resolution of an urban area was carried out. … The Lattice Boltzmann method (LBM) applied in this LES for several advantages. … Some events were highlighted to study the correlation between the high gust factor and the building geometry. …

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 71(4), I_37-I_42, 2015

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  • OBSERVATIONAL STUDY ON THE CO<sub>2</sub> FLUX IN SPRING ON SALT MARSH  [in Japanese]

    OTANI Sosuke , MARIKAWA Junpei , TANAKA Koichi , KAWASAKI Taiki

    … flux, the latent heat flux and sensible heat flux by eddy correlation method at reed marsh of Yodo River in May 2014. … flux were small, there was a negative correlation between the latent heat flux and CO<sub>2</sub> …

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 71(2), I_1315-I_1320, 2015

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  • Measurement of mass transfer coefficients and analyses of turbulent scalar transport with LES behind the orifice in a circular pipe  [in Japanese]

    TSUNEYOSHI Tatsuya , KAMIYA Kazuaki , ITO Takahiro , TSUJI Yoshiyuki

    … The mass transfer coefficient behind the orifice is computed by large eddy simulation (LES) and is also measured by electrochemical method. … Analyses of turbulent scalar transport and space-time correlation between wall scalar transfer and flow fields reveal that the mean wall scalar transfer is affected by not only near the wall region but also the coherent scalar fields away from the wall. …

    Transactions of the JSME (in Japanese) 81(828), 15-00162-15-00162, 2015

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