Manabu Tanaka

Single-step fast decomposition of high-strength organophosphorus in industrial aqueous waste using DC water plasma

Chengyuan Duan, Manabu Tanaka, Takayuki Watanabe

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Transport Coefficients for Water–Air Mixture Gases with Dissociation Reactions

Makoto Sugimoto, Honatsu Sorai, Manabu Tanaka, Takayuki Watanabe et autres

Transport coefficients of water-air mixture gases with dissociation reactions, consisting of diffusion coefficients, viscosity, and thermal conductivity, were calculated using the Chapman-Enskog method. To validate the accuracy of the calculation, the transport coefficients for pure water vapor and air were computed and …

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Role of sulfur in the treatment of organosulfur aqueous waste by water plasma

Hirotaka Sone, Manabu Tanaka, Takayuki Watanabe

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Numerical simulation by a coupled particle–grid model of droplet transfer driven by inertial force in gas metal arc welding

Hisaya Komen, Yuki Kobayashi, Shota Sekiguchi, Kei Yamazaki et autres

Komen H., Kobayashi Y., Sekiguchi S., et al. Numerical simulation by a coupled particle–grid model of droplet transfer driven by inertial force in gas metal arc welding. International Journal of Heat and Mass Transfer 270, 129180 (2026); https://doi.org/10.1016/j.ijheatmasstransfer.2026.129180.

Systematic Understanding of Temperature Fields and Electrode Phenomena in Multiphase AC Ar–N₂ Arcs

Manabu Tanaka, Takayuki Watanabe

The Formation Mechanism of Titanium-Based Transition Metal Nitride Nanoparticles Synthesized by Radio Frequency Induction Thermal Plasma

Yirong Wang, Kaiwen Zhang, Manabu Tanaka, Takayuki Watanabe

This study presents the successful synthesis of titanium-based transition metal nitride nanoparticles (Ti–Me–N, Me = Ta, Nb, Zr, Cr) using the radio frequency induction thermal plasma method. The mixture of microsized powders of Ti and Ta, Nb, Cr, or ZrN was vaporized …

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Achieving deep penetration welding of nitrogen-containing stainless steel using two-GTA doped with oxygen and nitrogen

Xinxin Wang, Hongyun He, Haochun Xu, Shinichi Tashiro et autres

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Volatile alloying elements modulate laser-induced arc stability: A material-dependent interaction mechanism

Xiao Xiao, Chi Zhang, Suozhu Bai, Dongsheng Wu et autres

It is generally known that a laser can stabilize an arc. However, some numerical studies suggested that the laser-induced metal vapor decreased the temperature and electrical conductivity of arc plasma in hybrid laser-arc processing.In this study, the effects of volatile alloying elements …

Plasma shapes optimized for functional output and quantified by entropy: a review

Osamu Sakai, Akinori Iwai, Tsuyohito Ito, Tomoyuki Murakami et autres

Abstract Plasma shapes are found in a vast variety of configurations. Notably, they are scientifically described in a stability analysis and also for natural or required functions exhibited by the plasma. Plasma is, basically, a thermodynamic state of matter with a specific …

Synthesis of Tantalum Nitride Nanoparticles With Different Nitridation Atmosphere in Induction Thermal Plasma

Yuta Tanoue, Yirong Wang, Motonori Hirose, Manabu Tanaka et autres

Tantalum nitride nanoparticles were successfully synthesized by induction thermal plasma. The nitrogen sources were controlled to investigate the impacts on nitridation process in thermal plasma. The chemical composition and morphology of the final product were detected by X-ray diffraction, X-ray photoelectron spectroscopy, …

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Metal flow mechanisms during alternating current arc welding and additive manufacturing of aluminium alloy

Bin Xu, Chengyu Zhang, Guokai Zhang, Fan Jiang et autres

Alternating current (AC) arc melting technology has been developed for the manufacturing of lightweight materials and provides a potential heat source in welding and additive manufacturing. However, metal flow and the corresponding effects of AC arc melting remain unclear. Here, 3D internal …

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CT Imaging Analysis Before and After Biologic Therapy in Severe Asthma

Hiroki Koda, Toshiyuki Koya, Wakana Uji, Mitsuru ENDO et autres

Abstract Background: Biologics for severe asthma have been shown to reduce exacerbations and reduce or discontinue oral steroids. Moreover, biologic therapy has been reported to be associated with mucus plug reduction. In contrast, it has been suggested that in severe asthma, as …

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