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Ichiro Ueno
Tokyo University of Science
199Publications
13H-index
607Citations
Publications 199
Newest
Published on Jun 16, 2019in Langmuir 3.68
Lizhong Mu1
Estimated H-index: 1
(DUT: Dalian University of Technology),
Harunori Yoshikawa7
Estimated H-index: 7
(CNRS: Centre national de la recherche scientifique)
+ 3 AuthorsIchiro Ueno13
Estimated H-index: 13
(Ridai: Tokyo University of Science)
The wetting process of a high energy surface can be accelerated locally through the capillary interaction of a liquid advancing front with a micro-object introduced to the surface (Mu et al., J. Fluid Mech, 2017, 830, R1). We demonstrate that a linear array of micropillars embedded in a fully wettable substrate can produce quick propagation of liquid along the array. It is observed that multiple interactions of a liquid front with pillars can induce the motion of liquid a hundred times faster th...
Published on Jan 1, 2019
Toru Ogasawara (Ridai: Tokyo University of Science), Kosuke Motegi2
Estimated H-index: 2
(Ridai: Tokyo University of Science)
+ 1 AuthorsIchiro Ueno13
Estimated H-index: 13
(Ridai: Tokyo University of Science)
Hideki Sato (Ridai: Tokyo University of Science), S. Kimura23
Estimated H-index: 23
(Ridai: Tokyo University of Science)
+ 5 AuthorsChiaki Mukai (Ridai: Tokyo University of Science)
Published on Oct 1, 2018in Microgravity Science and Technology 1.97
Taishi Yano8
Estimated H-index: 8
(Yokohama National University),
Koichi Nishino18
Estimated H-index: 18
(Yokohama National University)
+ 4 AuthorsNobuyuki Imaishi21
Estimated H-index: 21
(Kyushu University)
This paper reports an overview and some important results of microgravity experiments called Dynamic Surf, which have been conducted on board the International Space Station from 2013 to 2016. The present project mainly focuses on the relations between the Marangoni instability in a high-Prandtl-number (Pr= 67 and 112) liquid bridge and the dynamic free surface deformation (DSD) as well as the interfacial heat transfer. The dynamic free surface deformations of large-scale liquid bridges (say, fo...
Lizhong Mu1
Estimated H-index: 1
(DUT: Dalian University of Technology),
Harunori Yoshikawa7
Estimated H-index: 7
(CNRS: Centre national de la recherche scientifique)
+ 6 AuthorsIchiro Ueno13
Estimated H-index: 13
(Ridai: Tokyo University of Science)
Abstract We perform experiments to investigate how particles of micro-meter size modify the wetting of a completely wettable solid surface. The motion of a macroscopic contact line (MCL) is observed to be altered in the region surrounding the particles. The MCL is accelerated locally by a single particle to advance approximately 10 times faster than that in the absence of the particle. Different geometrical arrangements of particles produce different wetting speeds and different MCL shapes throu...
Published on Aug 1, 2018in International Journal of Heat and Mass Transfer 4.35
Takumi Watanabe1
Estimated H-index: 1
(Ridai: Tokyo University of Science),
Tomohiko Takakusagi2
Estimated H-index: 2
(Ridai: Tokyo University of Science)
+ 5 AuthorsSatoshi Matsumoto8
Estimated H-index: 8
(JAXA: Japan Aerospace Exploration Agency)
Abstract Thermocapillary-driven convection in a hanging droplet is experimentally investigated under normal- and micro-gravity conditions. A droplet is hung on a heated cylindrical rod facing downward, and another rod cooled is placed just beneath the droplet to create the designated temperature difference between both ends of the droplet. A transition of the flow field from a two-dimensional axisymmetric ‘steady’ flow to three-dimensional time-dependent ‘oscillatory’ ones by increasing temperat...
Published on Jan 1, 2018in International Journal of Heat and Mass Transfer 4.35
Toshiki Watanabe1
Estimated H-index: 1
(Ridai: Tokyo University of Science),
Yosuke Kowata1
Estimated H-index: 1
(Ridai: Tokyo University of Science),
Ichiro Ueno13
Estimated H-index: 13
(Ridai: Tokyo University of Science)
Abstract Thermocapillary-driven flow in a free liquid film, which has two gas-liquid interfaces, is experimentally investigated. Silicone oil of 5 cSt is employed as the test fluid. Two-dimensional basic flow known as ‘double-layered flow’ after Ueno and Torii (2010) is realized under small-enough Marangoni number Ma , the non-dimensional number to describe the intensity of thermocapillary effect, under the geometry considered in the present study. The flow exhibits a transition from the two-dim...
Published on Nov 21, 2017in Langmuir 3.68
Tomohiko Takakusagi2
Estimated H-index: 2
,
Ichiro Ueno13
Estimated H-index: 13
We focus on the flow patterns and resultant structures of suspended solid particles in a hanging droplet caused by thermocapillary effect. A droplet is hung on a heated cylindrical rod facing downward, and another rod cooled is placed just beneath the droplet to create the temperature difference between the both ends of the droplet. As the temperature difference increases, the induced flow exhibits transitions from an axisymmetric time-independent ‘steady’ state to three-dimensional time-depende...
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