Search Results - "Iwano, Koji"

Mechanism of drag coefficient saturation at strong wind speeds by Takagaki, Naohisa, Komori, Satoru, Suzuki, Naoya, Iwano, Koji, Kurose, Ryoichi

“…Previous studies have demonstrated the saturation of drag coefficients at strong wind speeds. But the mechanism behind this saturation has not yet been fully…”
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The meandering bend features of large-scale structures and the related coherent structures by Chen, Xiaonan, Iwano, Koji, Sakai, Yasuhiko, Ito, Yasumasa

“…•The meandering bend features of (Very) large-scale motions were experimentally investigated.•Most of hairpin vortices were observed existing at the…”
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Power spectrum of high Schmidt number scalar in a turbulent jet at a moderate Reynolds number by Iwano, Koji, Hosoi, Jumpei, Sakai, Yasuhiko, Ito, Yasumasa

“…The power spectrum of concentration fluctuation of high Schmidt number dye ( Sc ≃ 2.9 × 10 3 ) was measured in a liquid-phase axisymmetric turbulent jet at the…”
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Effect of large-scale structures on bursting phenomenon in turbulent boundary layer by Chen, Xiaonan, Iwano, Koji, Sakai, Yasuhiko, Ito, Yasumasa

“…•Hairpin vortex can be detected by the Variable-Interval Time-Averaging technique.•The distribution of bursting was affected by the existence of large-scale…”
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Strong correlation between the drag coefficient and the shape of the wind sea spectrum over a broad range of wind speeds by Takagaki, Naohisa, Komori, Satoru, Suzuki, Naoya, Iwano, Koji, Kuramoto, Takenori, Shimada, Satoshi, Kurose, Ryoichi, Takahashi, Keiko

“…Momentum transfer across the wind‐driven breaking air‐water interface under strong wind conditions was experimentally investigated using a high‐speed wind‐wave…”
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Momentum Diffusion Near Jet Exit in a Round Jet Controlled by Half Delta-Wing Tabs by Ito, Yasumasa, Naganawa, Kosuke, Sakai, Yasuhiko, Iwano, Koji

“…Direct numerical simulations for a round jet controlled by half delta-wing tabs are performed to elucidate the transition of turbulent diffusion near the jet…”
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Numerical investigation of passive scalar transport and mixing in a turbulent unconfined coaxial swirling jet by Kadu, Pravin Ananta, Sakai, Yasuhiko, Ito, Yasumasa, Iwano, Koji, Sugino, Masatoshi, Katagiri, Takahiro, Nagata, Koji

“…•DNS is used to demonstrate the mixing characteristics of coaxial swirling jet.•Diffusion of scalars in intermediate swirl case is with a lower rate at…”
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Mass transfer velocity across the breaking air-water interface at extremely high wind speeds by Iwano, Koji, Takagaki, Naohisa, Kurose, Ryoichi, Komori, Satoru

“…Mass transfer velocity k L across the wind-driven air-water interface was estimated at extremely high wind speeds (up to U 10 =70 m s −1 ) in a high-speed…”
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Smooth-surfaced flexible wall shear stress sensor fabricated by film transfer technology by Hasegawa, Yoshihiro, Okihara, Chiaki, Yamada, Takayuki, Komatsubara, Kai, Iwano, Koji, Sakai, Yasuhiko, Shikida, Mitsuhiro

“…•Flexible wall shear stress sensor fabricated by film transfer technology is proposed.•We fabricated three types of sensors with film thickness of 0.5, 1.0,…”
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Feature normalization based on non-extensive statistics for speech recognition by Pardede, Hilman F., Iwano, Koji, Shinoda, Koichi

“…► We propose a feature normalization method for robust speech recognition. ► It operates in a spectral domain intermediate between log and linear. ► We name…”
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Development of an optical imaging technique for particle number density by Naohisa TAKAGAKI, Koji IWANO, Emil ILYASOV, Satoru KOMORI, Yoshiyuki SHIRAKAWA

“…Accurate measurements of particle number density along with particle diameters and velocities are strongly required both in academic and industrial fields. A…”
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Semi in-situ measurement of zincate ion concentration near zinc anode using background-oriented Schlieren technique by Ito, Yasumasa, Liang, Xiao, Ishikawa, Kohei, Ujihara, Toru, Sakai, Yasuhiko, Iwano, Koji

“…In metal-anode batteries such as zinc, the concentration of metal ions in the electrolyte usually plays a significant role in the metal electrodeposition upon…”
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Joint statistics between velocity-gradient and fluctuating pressure in a turbulent planar jet by Mamoru TAKAHASHI, Koji IWANO, Yasuhiko SAKAI, Yasumasa ITO

“…Joint statistics between velocity gradient and fluctuating static pressure in a turbulent planar jet are experimentally investigated. The experimental data was…”
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Effect of Schmidt number in planar jet with chemical reaction by DNS by KITO, Kenji, IWANO, Koji, SAKAI, Yasuhiko, ITO, Yasumasa

“…A direct numerical simulation (DNS) of a planar jet with a second-order chemical reaction is performed using four different Schmidt number (Sc = 1, 2, 4, 8)…”
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Numerical investigation on characteristics of separation vortices between blades of two-dimensional cascade by SETO, Kosuke, IWANO, Koji, ITO, Yasumasa, SAKAI, Yasuhiko, KOSAKA, Sho, YOSHIDA, Kenji

“…In this study, LES calculations by OpenFOAM were performed using five blade models with different blade thicknesses (original, quarter, half, 3-quarters, and…”
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Effect of Schmidt number in planar jet with chemical reaction by DNS by KITO, Kenji, IWANO, Koji, SAKAI, Yasuhiko, ITO, Yasumasa

“…A direct numerical simulation (DNS) of a planar jet with a second-order chemical reaction is performed using four different Schmidt number (Sc = 1, 2, 4, 8)…”
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Efficiency analysis of two-period asymmetric gaits by Harata, Yuji, Iwano, Koji, Asano, Fumihiko, Ikeda, Takashi

“…This paper investigates the properties and optimality of asymmetric passive-dynamic gaits of a rimless wheel and a compass-like biped. Two types of asymmetric…”
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Study on control of axisymmetric jet by half delta-wing shaped vortex generators (Part 2: Evaluation of statistics on the thermal field) by Kensuke MIURA, Yasumasa ITO, Yasuhiko SAKAI, Koji IWANO, Koji NAGATA

“…Effects of half delta-wing shaped vortex generators (VGs) on thermal diffusion of an axisymmetric jet are experimentally investigated. The basic experimental…”
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Scalar mixing near the turbulent/non-turbulent interface in the planar liquid jet with chemical reaction by Koji IWANO, Kota NAKAGAWA, Yasuhiko SAKAI, Yasumasa ITO

“…Chemical reaction near turbulent/non-turbulent (T/NT) interface in liquid phase turbulent flow was investigated experimentally. The concentrations of reactive…”
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数値シミュレーションによる二次元翼列の翼間流れにおけるはく離渦の特性に関する研究 by 瀬戸, 孝祐, 岩野, 耕治, 伊藤, 靖仁, 酒井, 康彦, 小坂, 翔, 吉田, 憲司

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