Search Results - "Takuma KOGAWA"

Enhancement of gas production from methane hydrate reservoirs by the combination of hydraulic fracturing and depressurization method by Feng, Yongchang, Chen, Lin, Suzuki, Anna, Kogawa, Takuma, Okajima, Junnosuke, Komiya, Atsuki, Maruyama, Shigenao

“…•Gas production from fractured methane hydrate reservoir is investigated.•Depressurization effect can be enhanced by fracturing reservoir in…”
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Numerical analysis of gas production from layered methane hydrate reservoirs by depressurization by Feng, Yongchang, Chen, Lin, Suzuki, Anna, Kogawa, Takuma, Okajima, Junnosuke, Komiya, Atsuki, Maruyama, Shigenao

“…Many natural methane hydrate (MH) reservoirs are heterogeneous and are characterized by a layered structure. In this study, we numerically investigate gas…”
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Construction and simulation of reservoir scale layered model for production and utilization of methane hydrate: The case of Nankai Trough Japan by Chen, Lin, Feng, Yongchang, Kogawa, Takuma, Okajima, Junnosuke, Komiya, Atsuki, Maruyama, Shigenao

“…This study is focused on the utilization of oceanic methane hydrate as an energy resource under the real production situations of Nankai Trough, Japan. Due to…”
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Effect of gas radiation-depended natural convection on the transition of spatially developing boundary layers by Kogawa, Takuma, Okajima, Junnosuke, Komiya, Atsuki, Maruyama, Shigenao

“…•Evaluated mechanism between natural convection and thermal radiation effect•Investigated effect of turbulence generation by comparing turbulence…”
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Influence of radiation effect on turbulent natural convection in cubic cavity at normal temperature atmospheric gas by Kogawa, Takuma, Okajima, Junnosuke, Sakurai, Astushi, Komiya, Atsuki, Maruyama, Shigenao

“…•The influence of the surface radiation on the flow instability was significantly higher.•The circulation of the flow was enhanced by the radiation effect.•The…”
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Temperature distribution analysis using a combination of near-infrared laser, gold nanorods, and surface cooling equipment by Obonai, Akiyoshi, Kogawa, Takuma, Kanda, Yuki, Oluwafemi, Oluwatobi S., Kodama, Tetsuya, Komiya, Atsuki

“…•Composite heat transfer characteristics were experimentally evaluated.•The possibility of tumor treatment without causing skin damage was demonstrated.•The…”
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Protection from thermal radiation of hazardous fires: Optimizing microscale droplet size in mist barriers using radiative transfer analysis by Gonome, Hiroki, Nagao, Taichi, Takagi, Yuto, Ono, Mizuho, Kogawa, Takuma, Moriya, Shuichi, Okajima, Junnosuke

“…The incidence of large-scale fires continues to rise, and the effects of radiation from these fires contributes to their continued spread. Water sprays have…”
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Effects of concentration of participating media on turbulent natural convection in cubic cavity by Kogawa, Takuma, Chen, Lin, Okajima, Junnosuke, Sakurai, Atsushi, Komiya, Atsuki, Maruyama, Shigenao

“…•High concentration participating medium makes turbulence and strong thermal diffusion.•Convective and radiative heat transfer can be separated even though,…”
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Evaluation of a vacuum insulated temperature calibration device to calibrate thermistor characteristics for skin cancer diagnosis by Fujita, Homei, Nonaka, Takashi, Hosokawa, Yasushi, Kogawa, Takuma, Guo, Fuhui, Iseki, Yuya, Yokota, Miyo, Okabe, Takahiro, Maruyama, Shigenao

“…Recent methods using thermistors as an early detection of skin cancer require the higher resolution of 5 mK. Previously, the authors developed a vacuum…”
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Estimation of radiative thermal conductivity of glass wool using high precision GHP apparatus by GUO, Fuhui, KOGAWA, Takuma, KOMIYA, Atsuki, MARUYAMA, Shigenao

“…In this study, the effective thermal conductivity of glass wool was measured under different temperature and packing ratio conditions using a high-precision…”
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Organic anion transporting polypeptides 1B1 and 1B3 play an important role in uremic toxin handling and drug-uremic toxin interactions in the liver by Sato, Toshihiro, Yamaguchi, Hiroaki, Kogawa, Takuma, Abe, Takaaki, Mano, Nariyasu

“…Organic anion-transporting polypeptide (OATP) 1B1 and OATP1B3 contribute to hepatic uptake of numerous drugs. Thus, reduced OATP1B1 and OATP1B3 activity in…”
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Large eddy simulation of turbulent natural convection between symmetrically heated vertical parallel plates for water by Kogawa, Takuma, Okajima, Junnosuke, Komiya, Atsuki, Armfield, Steven, Maruyama, Shigenao

“…•Boundary layer interaction in the turbulent natural convection of the vertical parallel plate was examined by large eddy simulation.•Flow instability was…”
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Effects of heat sink on frictional heat effect in PEEK/Steel Pair（Numerical calculation using OpenFOAM model and experiments） by Takuma KOGAWA, Naoto OGASAWARA, Daisuke MORI, Tomoharu AKAGAKI

“…The PEEK material has been applied to a sliding bearing system in a power plant system because of its high mechanical durability. In the solid friction of the…”
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Melting heat transfer in rectangular cavity filled with ice slurry heated from below by Taimei MIYAGAWA, Takahiro OKABE, Takuro MIYANISHI, Takuma KOGAWA, Hiroyuki MURATA, Koji FUMOTO

“…Ice slurry is a homogeneous mixture of small ice particles and a carrier liquid. It is widely used in many fields. Previous studies have gradually clarified…”
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Classification of thermal conductivity of porous insulation using measurement result by high precision GHP by Fuhui GUO, Takuma KOGAWA, Shuta KOYANAGI, Hiroshi OSAWA, Atsuki KOMIYA, Shigenao MARUYAMA

“…In this study, the thermal conductivity of porous insulation materials and vacuum insulation panel (VIP) composed of glass wool were measured under different…”
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Modeling of scattering coefficient for biological tissues exposed to near-infrared laser irradiation by Obonai, Akiyoshi, Kogawa, Takuma, Kanda, Yuki, Kodama, Tetsuya, Komiya, Atsuki

“…•Scattering − The change in scattering coefficient was expressed using the thermal damage factor.•Simulation with σs varying as a function of thermal damage…”
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Numerical analysis of gas production from reservoir-scale methane hydrate by depressurization with a horizontal well: The effect of permeability anisotropy by Feng, Yongchang, Chen, Lin, Suzuki, Anna, Kogawa, Takuma, Okajima, Junnosuke, Komiya, Atsuki, Maruyama, Shigenao

“…Methane hydrate (MH) is regarded as one of the potential and substantial energy resources. The permeability of hydrate-bearing layer (HBL) can potentially…”
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Evaluation of radiative absorption effect to estimate mean radiant temperature in environments with high water vapor concentration such as in a sauna by Ishibashi, Hikaru, Tomabechi, Riku, Nishidate, Kurumu, Osaka, Nanaho, Shimomura, Tomoki, Yamada, Shoei, Okajima, Junnosuke, Kogawa, Takuma

“…The importance of modeling the radiative absorption in an environment with a high concentration of water vapor, such as inside a sauna, was studied through…”
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Controlling instability waves on vertical natural convection using a buoyant impinging jet by Koizumi, Takuma, Kogawa, Takuma, Torres, Juan F., Kanda, Yuki, Komiya, Atsuki

“…Natural convective heat transfer is typically enhanced by installing fin arrays and other devices that increase the surface area; however, large surfaces…”
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Experimental evaluation of thermal radiation effects on natural convection with a Rayleigh number of 108–109 by using an interferometer by Kogawa, Takuma, Shoji, Eita, Okajima, Junnosuke, Komiya, Atsuki, Maruyama, Shigenao

“…•The large-aperture interferometer system could capture the thermal boundary layer of the natural convection.•The high wall temperature difference due to the…”
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