Research activity information

• Carbon Nanotube Synthesis via the Calciothermic Reduction of Carbon Dioxide with Iron Additives
  Tatsuya Kikuchi; Ryoma Ishida; Shungo Natsui; Takehiko Kumagai; Isao Ogino; Norihito Sakaguchi; Mikito Ueda; Ryosuke O. Suzuki
  ECS SOLID STATE LETTERS, 4, 9, M19, M22, 2015, [Peer-reviewed]
  English, Scientific journal
• Numerical Analysis of Rising Bubble in Reduced-pressure Environment
  Takehiro Himeno; Takehiko Kumagai
  TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 101, 2, 109, 116, 2015, [Peer-reviewed]
  Japanese, Scientific journal
• Numerical Simulation of Bubble Rising in Liquid
  Osamu Nakamura; Takehiko Kumagai; Kouji Takatani
  TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 101, 2, 117, 122, 2015, [Peer-reviewed]
  Japanese, Scientific journal
• Numerical Analyses of Single Rising Bubble in a Viscous Fluid in an Enclosure
  Toshio Tagawa; Yohei Anzai; Takehiko Kumagai
  TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 101, 2, 101, 108, 2015, [Peer-reviewed]
  Japanese, Scientific journal
• Observation of Single and Continuous Bubbles Rising in Reduced Pressure Vessel
  Takehiko Kumagai; Yasuo Kishimoto; Osamu Nakamura; Toshio Tagawa; Takehiro Himeno; Shinichi Shimasaki
  TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 101, 2, 93, 100, 2015, [Peer-reviewed]
  Japanese, Scientific journal
• Stable mesh-free moving particle semi-implicit method for direct analysis of gas-liquid two-phase flow
  Shungo Natsui; Hifumi Takai; Takehiko Kumagai; Tatsuya Kikuchi; Ryosuke O. Suzuki
  CHEMICAL ENGINEERING SCIENCE, 111, 286, 298, May 2014, [Peer-reviewed]
  English, Scientific journal
• Multiphase Particle Simulation of Gas Bubble Passing Through Liquid/Liquid Interfaces
  Shungo Natsui; Hifumi Takai; Takehiko Kumagai; Tatsuya Kikuchi; Ryosuke O. Suzuki
  MATERIALS TRANSACTIONS, 55, 11, 1707, 1715, 2014
  English, Scientific journal
• Formation Behaviors of Microchannels in Reactive-Sintered Ni-Al Alloys by Sacrificial-Core Method
  TESHIROGI Yuya; OHMI Tatsuya; KUMAGAI Takehiko; IGUCHI Manabu
  実験力学 : journal of JSEM, 13, s209, s212, The Japanese Society for Experimental Mechanics, 01 Jul. 2013
  English, We investigate the effects of process conditions on the formation behavior of microchannels in reactive-sintered Ni-Al alloys as a part of a study to develop a powder-metallurgical process to produce a transpiration-cooling device including microchannel networks for a disaster preventing robot. The microchannel was successfully produced by a sacrificial-core method with a compact specimen composed of Ni and Al elemental powders when a moderate heating pattern was employed for sintering.
• Effect of Small Rectangular Channel Height on Bubble Moving Velocity in Gas-liquid Two-phase Flow through Sudden Contraction
  FUKASAWA SATOSHI; KUMAGAI TAKEHIKO; OHMI TATSUYA; IWAI KAZUHIKO; IGUCHI MANABU
  混相流 = Japanese journal of multiphase flow, 27, 2, 168, 174, THE JAPANESE SOCIETY FOR MULTIPHASE FLOW, 15 Jun. 2013
  Japanese, An experimental investigation is carried out on the effects of a sudden contraction on the characteristics of an air-water two-phase flow in a millimeter-scale rectangular channel. The results reveal that the flow pattern transition types caused by sudden contraction can be basically classified into five. The scatter of the leading edge velocity of a bubble observed downstream of the sudden contraction increases as the channel height becomes smaller than a certain critical value. This phenomenon is not beneficial for practical usage of gas-liquid two-phase flows in micro channels.
• Structure Control of Cu-Zn Microchannel Lining Layers with Electrochemical Dissolution
  KOBAYASHI Kazuki; OHMI Tatsuya; KUMAGAI Takehiko; SAKAIRI Masatoshi; IGUCHI Manabu
  実験力学 : journal of JSEM, 12, s213, s216, The Japanese Society for Experimental Mechanics, 01 Jul. 2012
  English, The effect of potentiostatic dissolution on the structure of a Cu-Zn alloy microchannel lining layer was investigated. The microchannel lining layer was fabricated by a powder-metallurgical process using copper powder and zinc wire. The lining layer became more porous after potentiostatic dissolution at a constant potential of −0.5 V vs. Ag/AgCl. The lining layer was remarkably dezinced and it contained many open pores under the dissolution condition at +0.5 V. These results indicate the possibility of precise structure control of the microchannel lining layer.
• Fabrication of Free-Form Channels by a combined process of Metal Injection Molding and Sacrificial-Core Method
  SHITARA Yutaro; OHMI Tatsuya; KUMAGAI Takehiko; IGUCHI Manabu
  実験力学 : journal of JSEM, 12, s226, s231, The Japanese Society for Experimental Mechanics, 01 Jul. 2012
  English, A novel process has been examined to produce a free-form metal pipe containing thin channels. This process combined a sacrificial-core method and Metal Injection Molding (MIM). MIM compound containing SUS304 stainless steel powder was used as a body compound, and a compound with Cu powder was used as a sacrificial-core compound. These compounds were assembled and injection-molded, and then thermally treated for dewaxing and sintering. With an adequate heating treatment, the sacrificial-core metal migrated to the body-metal region, and thus a channel was successfully produced.
• Composition and Structure Changes in Al_3Ni_2 Microchannel Lining Layers by Alkali Leaching
  SAITOH Yusuke; OHMI Tatsuya; SAKAIRI Masatoshi; KUMAGAI Takehiko; IGUCHI Manabu
  実験力学 : journal of JSEM, 12, s237, s242, The Japanese Society for Experimental Mechanics, 01 Jul. 2012
  English, Effects of alkali leaching time on the composition and structure changes in the Al₃Ni₂ microchannel lining layer produced by a sacrificial-core method have been investigated. The composition was measured both on the specimen surface directly exposed to the leachant and on the new surface cut after alkali leaching. In each surface, the decrease in Al concentration became sluggish after formation of Ni₃Al. On the other hand, nano structure consisted of almost pure Ni was detected on the inner wall of the microchannel leached for 864 ks.
• Fabrication of Ni-Al Alloy Transpiration-Cooling Device by Powder-Metallurgical Microchanneling Process
  OMURA Masutaka; OHMI Tatsuya; KUMAGAI Takehiko; IGUCHI Manabu
  Proceedings of the Japan Society for Photoelasticity, 11, 0, s272, s275, The Japanese Society for Experimental Mechanics, 2011
  English, We examine a concept and fabrication method of a microchannel-type transpiration-cooling device consisting of thermally resistant metals. The device consists of open-porous Ni-Al alloys and contains microchannel networks. Cooling water is supplied from a tank to every corner of the device through the microchannel networks, and then it seeps out to be vaporized absorbing the latent heat. The porous body of the device and the microchannel are produced by a powder-metallurgical microchanneling process using a sacrificial core.
• Gas-Liquid Two-Phase Flow through an Orifice in Millimeter-Scale Rectangular Channel
  OKE Takashi; KUMAGAI Takehiko; Ilegbusi Olusegun J; IGUCHI Manabu
  Proceedings of the Japan Society for Photoelasticity, 11, 0, s53, s58, The Japanese Society for Experimental Mechanics, 2011
  An experimental investigation is carried out on air-water two-phase flow through a plate orifice in a millimeter-scale rectangular channel. The width of the channel is kept constant at 50 mm and the height is varied from 0.19 mm to 2.00 mm. The contraction ratio of the orifice is varied from 0.04 to 0.4, and the thickness of the orifice also is allowed to vary over a wide range. The flow patterns upstream and downstream of the orifice are observed with a high-speed camera and by visual inspection. The conditions for occurrence of the observed flow patterns are presented on a flow pattern map. The velocity of the leading edge of a bubble, representing the bubble velocity, is deduced from the camera images. In the upstream part of the test section the bubble velocity is approximated by the sum of the superficial velocities of air and water. A correlation is proposed for the maximum bubble velocity in the whole test section as a function of the two superficial velocities and the contraction ratio.
• Recent investigations on multiphase flows in micro-scale channels
  大毛 隆志; 熊谷 剛彦; 井口 学
  Swirl, 4, 1, 26, 30, 旋回噴流システム研究会, Jun. 2010
  Japanese
• A bouncing droplet on an inclined hydrophobic surface
  Yoshiaki Ueda; Yusuke Sakai; Takehiko Kumagai; Toshio Ishii; Manabu Iguchi
  JOURNAL OF VISUALIZATION, 13, 1, 5, 6, Feb. 2010
  English, Scientific journal
• Flow Patterns of Gas-Liquid Two-phase Flow through an Abrupt Expansion in Millimeter-Scale Rectangular Channel
  OKE Takashi; KUMAGAI Takehiko; IGUCHI Manabu
  Proceedings of the Japan Society for Photoelasticity, 10, 0, s32, s37, The Japanese Society for Experimental Mechanics, 2010
  English, The effect of an abrupt expansion on the flow pattern of air-water two-phase flow in a millimeter-scale rectangular channel was investigated. The channel height was fixed as 0.19 mm, 0.50 mm, 1.00 mm and 2.00 mm. The expansion ratio was 5, 2.5, 1.67 and 1.25 for every channel height. The superficial velocity of air was varied from 5.0 cm/s to 80.0 cm/s and that of water was varied from 10.0 cm/s to 80.0 cm/s. As a result, a flow pattern with recirculation zone was observed in the channel height of 2.00 mm and 1.00 mm. This is the same pattern as that in the conventional scale pipes and ducts with an abrupt expansion. Furthermore, there was no effect of an abrupt expansion on the flow pattern when the expansion ratio was close to unity. On the other hand, in the channel height of 0.19 mm, each bubble spread in the lateral direction after it passed through the abrupt expansion. This is an interesting phenomenon in the small channel height.
• Effect of channel scale on flow pattern and pressure drop of air-water two-phase flow in rectangular millimeter-scale channels
  熊谷 剛彦; 井口 学
  Swirl, 2, 3, 10, 13, 旋回噴流システム研究会, Dec. 2008
  Japanese
• Effects of Channel Gap and Channel Attitude on Flow Pattern of Air-water Two-phase Flow in Rectangular Millimeter-scale Channels
  KUMAGAI Takehiko; OKUYAMA Yoshiyuki; IGUCHI Manabu
  Journal of JSEM, 8, 152, 157, 日本実験力学会, 25 Jun. 2008
  English, Effects of channel gap and channel attitude on the flow pattern of gas-liquid two-phase flow in rectangular millimeter-scale gap channels are investigated. The channel gap is varied from 0.5mm to 10.0mm. The observed flow patterns in horizontally placed channels are classified into three categories: bubbly flow, slug flow and annular flow. As the gap becomes small, the bubbly flow regime shifts to the slug flow regime. The boundary between the slug flow regime and the annular flow regime is hardly dependent on the gap. In the bubbly flow regime, the so-called channeling phenomenon of bubbles takes place. Concerning the effects of channel attitude on the flow pattern, a channel with a gap of 1.0mm is mainly used. The inclination angle of the channel is varied from 0° to 90° . The observed flow patterns for a vertically wide channel with an inclination angle of 0° are classified into three categories: bubbly flow, slug flow and stratified wavy flow. Those for an inclination angle of 90° are classified into bubbly flow, slug flow and annular flow. As the inclination angle increases form 0 to about 30°, the bubbly flow regime becomes wide. With a further increase in the inclination angle from about 30° to 90°, it becomes narrow. The slug flow regime changes with an increase in the inclination angle in a complicated manner.
• Wettability Effect on Flow Pattern in Horizontal Air-Water Two-Phase Flow in Rectangular Small Channels
  KUMAGAI Takehiko; IGUCHI Manabu
  Proceedings of the Japan Society for Photoelasticity, 7, 1, 50, 56, The Japanese Society for Experimental Mechanics, 2007
  Japanese, The flow patterns for gas-liquid two-phase flow have been experimentally investigated using "mm scale" rectangular channels. In this scale the transition of dominant forces from body forces such as the inertial force and buoyancy force to the surface force occurs. The surface force is changed in this study by coating repellent on the inner wall of the channel. The observed flow patterns are basically classified into three categories; bubbly flow, slug flow and annular flow just like those in wetted channels. The boundaries among them, however, become to depend on the wettability of the channel wall as the scale of the channel decreases.
• Effect of local wettability change on liquid plug length in microgravity
  YOSHIDA Jin; KUMAGAI Takehiko; IGUCHI Manabu
  Journal of JSEM, 4, 2, 115, 119, 日本実験力学会, 25 Jun. 2004
  Japanese
• Occurrence condition for a swirl motion of a bath agitated by bottom gas injection
  M Iguchi; D Iguchi; Y Sasaki; T Kumagai; S Yokoya
  ISIJ INTERNATIONAL, 44, 10, 1623, 1628, 2004
  English, Scientific journal
• Evaluation of Gas-Liquid Mass Transfer and Interfacial Area in Bubbling Jet
  Kumagai Takehiko; Iguchi Manabu; Nakatani Tadatoshi
  Tetsu- to- Hagane, 89, 7, 735, 741, The Iron and Steel Institute of Japan (ISIJ), Jul. 2003
  Japanese, Experimental investigation was carried out on the gas-liquid mass flux and interfacial area in a bottom blown bubbling jet. The mass flux was measured by two methods in a relatively low gas flow rate regime. One is based on a change in the bubble size and the other is based on a change in the pH in the bath. When the gas flow rate exceeded a certain critical value, the mass transfer coefficient was satisfactorily apporoximated by an previously proposed empirical equation for a clean liquid, regardless of the degree of contamination. An empirical equation was proposed for the total interfacial area in a bubbling jet as a function of the physical properties of fluids and process parameters.
• Wettability Effect on the Flow Pattern of Water-Oil Two-Phase Flows Ascending in Vertical Circular Pipe
  KINJO Tomonori; IGUCHI Manabu; KUMAGAI Takehiko
  Japanese journal of multiphase flow, 17, 2, 154, 163, 日本混相流学会, 15 Jun. 2003
  Japanese
• Mass Transfer from a Single Stationary Bubble in Highly Turbulent Flow
  Kumagai Takehiko; Iguchi Manabu
  Tetsu- to- Hagane, 88, 11, 715, 722, The Iron and Steel Institute of Japan (ISIJ), Nov. 2002
  Japanese, A single CO_2 bubble was held in a downward highly turbulent flow field realized in a tapered pipe. The dissolution process of the bubble was recorded with a CCD camera and the images were processed on a personal computer to determine the mass transfer coefficient for the bubble. An empirical equation was proposed for the mass transfer coefficient by referring to the previously obtained experimental findings. The equation is expressed as a function of the size of the bubble and the turbulence intensity in addition to the well-known Schmidt number and Reynolds number. The measured values of the mass transfer coefficient were approximated by the equation within a scatter of ±60%. Such estimation accuracy is acceptable in this kind of measurement.
• Mass Transfer Influenced by Wave Motions Appearing on Gas-Liquid Interface Exposed to Turbulent Flow
  KUMAGAI Takehiko; IGUCHI Manabu; UEMURA Tomomasa; YONEHARA Noriyoshi
  Tetsu- to- Hagane, 88, 4, 180, 187, The Iron and Steel Institute of Japan (ISIJ), Apr. 2002
  Japanese, Wave motions appear on the surface of a single-bubble rising in liquid when the bubble Reynolds number exceeds a certain critical value. Such wave motions enhance the mass transfer from the bubble to the liquid especially under the condition that the bubble surface is contaminated by surfactant. This is caused by surface renewal due to the wave motions. The mass transfer coefficient under this condition was experimentally measured using a simplified model. Water and CO_2 gas were used as the working fluids. Two empirical equations for the mass transfer coefficient were proposed.
• Visualization of the transport phenomenon of the carbon dioxide in the gas-liquid interface
  AKAMATSU Yuya; YONEHARA Noriyoshi; UEMURA Tomomasa; IGUCHI Manabu; KUMAGAI Takehiko
  可視化情報学会誌 = Journal of the Visualization Society of Japan, 21, 93, 94, 01 Jul. 2001
  Japanese
• 材料プロセスと輸送現象
  井口 学; 木内 弘道; 熊谷 剛彦
  資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan, 117, 4, 25 Apr. 2001
  Japanese
• Instability Phenomena at Bath Surface Induced by Top Lance Gas Injection
  KUMAGAI Takehiko; IGUCHI Manabu
  Transactions of the Iron and Steel Institute of Japan, 41, S52, S55, The Iron and Steel Institute of Japan, Mar. 2001
  English, Top lance gas injection processes are extensively used in metallurgical engineering. When the exit of the top lance is placed near the bath surface, a downward bubbling jet is generated in the bath. The flow patterns of the downward bubbling jet are classified into seven categories mainly with gas flow rate. Instability phenomena of the bubbling jet appear when the gas flow rate is higher than a certain critical value. The phenomena are strongly dependent on the penetration depth of the bubbling jet into the bath, and hence, an empirical relation is proposed for the penetration depth as a function of the gas flow rate, nozzle diameter and vessel diameter.
• Effects of liquid flow on gas-liquid mass transfer
  Takehiko Kumagai; Manabu Iguchi
  Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, 87, 4, 159, 166, Iron and Steel Institute of Japan, 2001
  Japanese, Scientific journal
• Characteristics of K_2TiCl_6 Synthesis from KCl and TiCl_4
  KUMAGAI Takehiko; KONDA Shoichi; SAKAKI Takeshi; ISHIKAWA Tatsuo; CHIBA Tadatoshi
  Chemical engineering, 24, 4, 558, 561, The Society of Chemical Engineers, Japan, 10 Jul. 1998
  Japanese, Reaction characteristics were examined for synthesis of K<SUB>2</SUB>TiCl<SUB>6</SUB> from KCl particles and TiCl<SUB>4</SUB> gas. The reaction experiments were carried out exposing different sizes of KCl particles to a TiCl<SUB>4</SUB> gas stream at 683 K. The mass gain due to formation of K<SUB>2</SUB>TiCl<SUB>6</SUB> was measured as a function of time and morphology of the product was observed by SEM and EPMA. The apparent reaction rate decreases rapidly with the progress of the reaction, and the reaction is virtually terminated before its completion EPMA analysis on the particle cross-section reveals that the products are distributed around an unreacted KCl core within the particle, and the termination of the reaction takes place when the thickness of the outer product layer grows up to about 6 μm. The reaction kinetics are explained well on the basis of an unreacted-core model which assumes that the rate determining step is the intra-particle TiCl<SUB>4</SUB> gas diffusion.
• Characteristics of TiCl_4 Dissolution into Equimolar NaCl-KCl Molten Salt
  KUMAGAI Takehiko; KONDA Shoichi; SASAKI Takeshi; ISHIKAWA Tatsuo
  Electrochemistry, 66, 1, 55, 60, 電気化学会, 05 Jan. 1998
  Japanese
• A preliminary experiment of volatilization of minerals in coal ash by chlorination treatment
  Taihei Shimada; Takehiko Kumagai; Takashi Tsurue; Yoshinori Nakata; Takeshi Okutani; Shohei Takeda; Jun-Ichiro Hayashi; Tadatoshi Chiba
  Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy, 76, 2, 134, 144, Maruzen Co. Ltd., 1997
  English, Scientific journal
• Characteristics of Gas Evolution during Coal Carbonization
  MATSUOKA Koichi; KAWAI Hitoshi; KUMAGAI Takehiko; CHIBA Tadatoshi
  Tetsu- to- Hagane, 82, 5, 383, 387, The Iron and Steel Institute of Japan (ISIJ), 01 May 1996
  Japanese, Changes in mass with time due to gas evolution during carbonization were observed for particles and a cylindrical pellet of various coals heated respectively in a thermogravimetric balance and a microautoclave. The experiments were carried out for a range of the heating rate from 1 to 50K/min, the holding temperature from 673 to 823K and the nitrogen gas pressure of 0.1 and 1.0MPa. Effects of these operating variables on the gas evolution characteristics were experimentally examined. It was demonstrated that the gas evolution characteristics depend on the heating rate and the holding temperature as well as coal nature. Moreover, the total amount of gas evolved at a holding temperature was shown to be independent of the heating rate and to increase with the holding temperature. A simple reaction model is proposed for gas evolution which assumes coal to consist of two components having different reactivities for pyrolysis ; one producing gas along with formation of semicoke via plastic intermediate and the other converting directly to gas. The model parameters were analyzed by fitting the model to the observed results and successfully utilized to explain observed results at different operating conditions.
• Production of Al_3Ti by the Reaction of Al with TiCl_4 Dissolved in NaCl-KCl Molten Salts
  KUMAGAI Takehiko; KONDA Shoichi; SASAKI Takeshi; ISHIKAWA Tatsuo
  Electrochemistry, 64, 4, 296, 300, 電気化学会, 05 Apr. 1996
  Japanese
• Apparent Coal Viscosity Estimated from Needle Penetration into Pellet of Pulverized Coal Particles
  MATSUOKA Koichi; KUMAGAI Takehiko; CHIBA Tadatoshi
  Transactions of the Iron and Steel Institute of Japan, 36, 1, 40, 44, The Iron and Steel Institute of Japan, Jan. 1996
  English, Needle penetration and volumetric dilation were measured for cylindrical pellets of six kinds of pulverized coal particles using a needle penetrometer. The measurements were conducted for a range of the heating rate from 1 to 20 K/min, the holding temperature from 698 to 823 K and the nitrogen gas pressure from 0.1 to 3.0 MPa. Both needle penetration and dilation characteristics depended on these operating variables. Especially, an appreciable needle penetration occurred at high heating rate for coals which exhibited little softening property at low heating rata. Unreasonably high activation energies for viscosity were obtained when the needle penetration curves were analyzed on the basis of an equation of motion assuming that the pellet behaves as a Newtonian fluid with a temperature dependency of viscosity given by Andrade's equation.
• 鉛電解精製工程のエネルギー計算
  熊谷 剛彦; 千葉 忠俊
  資源・素材, 1995, 57, 58, 18 Sep. 1995
  Japanese

• Preface to the Special Issue on Multiphase Flow Phenomena in Refining Processes
  Takehiko Kumagai, TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, 101, 2, 73, 73, 2015
  Japanese, Others
• 分科会合同ワークショップ2009 : -実験力学における計測・データ処理の問題点・ノウハウ・工夫-参加報告
  西原 一嘉; 熊谷 剛彦, 実験力学 : journal of JSEM, 9, 4, 25 Dec. 2009
  Japanese
• Report on 6^ PSFVIP
  KUMAGAI Takehiko; OHMI Tatsuya; IGUCHI Manabu, 可視化情報学会誌 = Journal of the Visualization Society of Japan, 27, 106, 41, 41, 01 Jul. 2007
  Japanese

• J0502-2-2 Effect of channel scale on gas-liquid two-phase flow pattern through sudden expansion in small scale channel
  KUMAGAI Takehiko; IGUCHI Manabu
  年次大会講演論文集 : JSME annual meeting, 12 Sep. 2009, Japanese
  Relationship between the channel height and flow pattern of gas-liquid tow-phase flow in a millimeter-scale rectangular channel has been investigated experimentally. Particular attention is paid to the effect of the channel height on the flow pattern through a sudden expansion. The height is reduced from 2mm to 0.5mm. Some interesting flow patterns are observed with a decrease in the height of the channel. For example, the re-circulating flow commonly observed downstream of the sudden expansion in the conventional scale channel disappears at a height of 0.5mm.
• Effect of wettability of channel wall on pressure drop in gas-liquid two-phase flow in micrometer-scale rectangular channel
  熊谷 剛彦; 佐藤 政仁; 井口 学
  Proceedings of JSEM, 2009, Japanese
• Effect of inclination angle on bubble velocity in gas-liquid two-phase flow in millimeter-scale rectangular channel
  熊谷 剛彦; 磯崎 友香; 井口 学
  Proceedings of JSEM, 2008, Japanese
• Swirl motion of stratified two liquid layers induced by top lance gas injection
  KUMAGAI Takehiko
  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 01 Sep. 2004, Japanese
• Effect of swirl motion of bubbling jet on dissolution rate of gas
  KUMAGAI Takehiko; TERNSTEDT Patrik; JONSSON Par
  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 01 Sep. 2003, Japanese
• Swirling motion of gas-liquid two phase jet and mixing time in a cylindrical vessel
  SHITARA Moriyoshi
  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 01 Sep. 2003, Japanese
• Swirl motion of bath surface induced by gas injection from immersed top lance
  KUMAGAI Takehiko
  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 01 Mar. 2003, Japanese
• Swirling motion of gas-liquid two phase jet in a cylindrical vessel
  SHITARA Moriyoshi
  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 01 Mar. 2003, Japanese
• Gas-liquid mass transfer coefficient for bubbling jet in low gas flow rate regime
  KUMAGAI Takehiko
  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 01 Sep. 2002, Japanese
• Gas-liquid mass transfer from a single stationary bubble in downward flow
  KUMAGAI Takehiko
  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 01 Mar. 2002, Japanese
• Gas-liquid mass transfer in strongly turbulent flow which simulates wake flow
  KUMAGAI Takehiko
  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 01 Mar. 2001, Japanese
• Instability phenomena at bath surface induced by top lance gas injection
  KUMAGAI Takehiko; IGUCHI M
  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 01 Sep. 2000, English
• Effects of wake flow on gas-liquid mass transfer
  KUMAGAI Takehiko
  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 01 Sep. 2000, Japanese
• Effects of liquid flow on gas-liquid mass transfer
  KUMAGAI Takehiko
  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 01 Mar. 2000, Japanese
• Liquid Flow Phenomena in a Cylindrical Vessel after Sudden Rotation
  IGUCHI Manabu
  材料とプロセス : 日本鉄鋼協会講演論文集 = Current advances in materials and processes : report of the ISIJ meeting, 27 Mar. 1997, Japanese

• 材料工学実験Ⅰ, 2024年, 学士課程, 工学部
• 材料工学実験Ⅱ, 2024年, 学士課程, 工学部
• 創造工学, 2024年, 学士課程, 工学部