Search Results 1-20 of 43

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  • Pressure loss prediction of gaseous flow in a conduit-system of microchannel heat exchanger  [in Japanese]

    MURAKAMI Shintaro , TOYODA Kaoru , ASAKO Yutaka

    … In the experiment, the heat transfer plate which is the core of the heat exchanger has 34 rectangular microchannels. … The microchannels are 330 μm in width, 200 μm in depth and 20 mm in length. …

    Transactions of the JSME (in Japanese) 86(884), 20-00022-20-00022, 2020

    J-STAGE 

  • Secondary flows of viscoelastic fluids in serpentine microchannels

    Lucie Ducloué , Laura Casanellas , Simon J. Haward , Robert J. Poole , Manuel A. Alves , Sandra Lerouge , Amy Q. Shen , Anke Lindner

    … We investigate here the inertialess secondary flow of viscoelastic fluids in curved microchannels of rectangular cross-section and constant but alternating curvature: the so-called "serpentine channel" geometry. … In addition to our techniques being broadly applicable to the characterisation of three-dimensional flow structures in microchannels, our results are important for understanding the onset of instability in serpentine viscoelastic flows. …

    Microfluidics and Nanofluidics 23(33), 2019-02-05

    IR 

  • The flow behavior and heat transfer characteristic with phase change in a microchannel  [in Japanese]

    RONG LU , FUTSUTA Akihiro , KANEKO Akiko , ABE Yutaka , SUZUKI Yutaka

    … Hence, illuminate that by simulating the microchannels of the heat exchanger. … The shape of microchannel is rectangular, and hydraulic diameters is 500 μm. …

    The Proceedings of the National Symposium on Power and Energy Systems 2019.24(0), A132, 2019

    J-STAGE 

  • Behavior of Particles in Curved Microchannels:(Effect of Particle Density)  [in Japanese]

    NAKAMURA Akihiro , HAYAMIZU Yasutaka , HYAKUTAKE Toru , GONDA Takeshi , MORITA Shinichi , OHTSUKA Shigeru , YANASE Shinichiro , YAMAMOTO Kyoji

    … Curved microchannels are often used in these systems due to secondary flows. … In this study, we investigate behavior of particles in spiral rectangular microchannel, and effects of particle density and of Dean number <i>De</i> …

    The Proceedings of the Fluids engineering conference 2018(0), OS15-9, 2018

    J-STAGE 

  • Influence of Wall-Surface Wettability on Gas-Liquid Flow in Microchannel with Rectangular Cross Section  [in Japanese]

    Kishitani Kazuki , Hirota Masafumi

    … <p>The characteristics of air-water two-phase flows in microchannels with rectangular cross sections of 1mm × 0.5mm were investigated experimentally. …

    The Proceedings of the Thermal Engineering Conference 2018(0), 0165, 2018

    J-STAGE 

  • Rapid prototyping of PDMS microchannels for animal and plant cells using cutting plotter and double casting

    NAGAI Moeto , TADA Kyohei , SHIBATA Takayuki

    … A simple fabrication method of biocompatible microchannels with a height of 0.3 mm is significant for biological scientists to study animal and plant cells (∼0.1 mm). … Here, we report the development of an easy fabrication method of 0.3-mm-high polydimethylsiloxane (PDMS) microchannels based on a desktop cutting plotter (300 USD) and an engraved sheet as follows. …

    Mechanical Engineering Letters 4(0), 18-00377-18-00377, 2018

    J-STAGE 

  • Effect of axial conduction on heat transfer in a rectangular microchannel with local heat flux

    YU Fawen , WANG Tao , ZHANG Chengbin

    … <p>Based on the continuum assumption and Navier-Stokes equation, three-dimensional fluid flow and conjugate heat transfer in heat sinks with rectangle microchannels have been studied by numerical simulation. …

    Journal of Thermal Science and Technology 13(1), JTST0013-JTST0013, 2018

    J-STAGE 

  • Rapid Plasma Etching for Fabricating Fused Silica Microchannels

    MORIKAWA Kyojiro , MATSUSHITA Kazuki , TSUKAHARA Takehiko

    … Deep, rectangular microchannels, having vertical angles close to 90°, 10 μm-scale deep and low surface roughness of less than 1 nm, could be fabricated on a fused silica substrate at high etching rates on the order of 5 – …

    Analytical Sciences 33(12), 1453-1456, 2017

    J-STAGE 

  • Visualization of the air entrapment in microchannels containing cavities  [in Japanese]

    HIROSE Yuya , YAMAMOTO Ken , TAKEZAWA Hideyuki , OGATA Satoshi

    … <p>Processes of the air entrapment in microstructures fabricated on walls of rectangular microchannels were visualized by a high-speed camera. … The microchannels were made of stainless steel and acrylic, and the microstructures were hydrophobized by triazinethiol. …

    The Proceedings of the Fluids engineering conference 2016(0), 0310, 2016

    J-STAGE 

  • Visualization of the formation process of slip flows by the air entrapment in microchannels  [in Japanese]

    YAMAMOTO Ken , HIROSE Yuya , TAKEZAWA Hideyuki , OGATA Satoshi

    … <p>Processes of the air entrapment in microstructures fabricated on walls of rectangular microchannels were visualized by a high-speed camera. … The microchannels were made of stainless steel and acrylic, and the microstructures were hydrophobized by triazinethiol. …

    Transactions of the JSME (in Japanese) 82(841), 16-00164-16-00164, 2016

    J-STAGE 

  • 1615 Geometric effect on mixing with unstable flow of polymer solutions in microchannels  [in Japanese]

    DAIGO Ryosuke , NARUMI Takatsune , USHIDA Akiomi

    … In this study, we have investigated the mixing properties in microchannels utilizing unstable flows generated with polymer solutions. … Microchannels with abrupt contraction-expansion parts consisted of asymmetric rectangular block gates were tested and mixing procedure in it was visualized with combination of dyed and undyed polymer solutions. …

    The Proceedings of Conference of Hokuriku-Shinetsu Branch 2016.53(0), _1615-1_-_1615-5_, 2016

    J-STAGE 

  • Gas and Non-Newtonian Liquid Two-Phase Flows in Microchannel  [in Japanese]

    Kawahara Akimaro , Mansoura Mohamed , Law Wenzhe , Sadatomi Michio

    流路代表寸法が1 mm以下の流路(マイクロチャンネル)内を流れる気液二相流はマイクロ化学反応器,小型熱交換器等で見られ,その現象の解明のための研究が盛んに行われている.これらの研究の作動液体の多くはニュートン流体である.他方,マイクロ化学反応器やバイオ分野では非ニュートン流体の流れがしばしば見られる.通常口径流路内の非ニュートン流体の二相流を調べた研究はあるが,マイクロ流路内のそれは数少ない.非ニ …

    NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan 63(0), 129, 2014

    J-STAGE 

  • S0520202 Effect of combination of two fluids on mixing with unstable flow of polymer solution in microchannels  [in Japanese]

    AKIBA Yuji , NARUMI Takatsune , USHIDA Akiomi

    … In this study, we have investigated the mixing properties in microchannels utilizing unstable flows generated with polymer solutions. … Microchannels with abrupt contraction-expansion parts consisted of asymmetric rectangular block gates were tested and mixing procedure in it was visualized with combination of dyed and undyed solutions. …

    The Proceedings of Mechanical Engineering Congress, Japan 2014(0), _S0520202--_S0520202-, 2014

    J-STAGE 

  • Mixing process with unstable flow of polymer solution in microchannels  [in Japanese]

    Arai Masato , Narumi Takatsune

    本研究では非対称な急縮小急拡大混合部を有するT字型のマイクロチャネルを用いて,希薄高分子溶液と水の二液混合実験を行った.高分子溶液としてポリエチレンオキサイド(PEO)水溶液を用い,その粘弾性特性により生じる不安定流動の効果で,水同士では混合しない条件下でも,混合が可能であることが分かった.また,非対称な急縮小急拡大流れを連続的に加えることで,さらに効果的に混合が進むことを明らかにした.混合効果が …

    NCTAM papers, National Congress of Theoretical and Applied Mechanics, Japan 62(0), 266, 2013

    J-STAGE 

  • 0315 Effect of Gas-Liquid Interface Shape on Drag Reduction in Microchannels  [in Japanese]

    TAKAHASHI Satoshi , OGATA Satoshi

    … Drag reduction have been reported in a lot of experiments in microchannels with hydrophobic cavities. … The analytical model is a rectangular channel of height h = 5 μm and width w = 20 μm with hydrophobic micro cavities on bottom and top of the channel. …

    The Proceedings of the Fluids engineering conference 2013(0), _0315-01_-_0315-02_, 2013

    J-STAGE 

  • F112 Visualization of exothermic chemical reactions in microchannels using a near-infrared two-wavelength imaging method : Absorption spectra and two-wavelength images of aqueous solutions of HCl and NaOH  [in Japanese]

    Kawashima Daisuke , Kakuta Naoto , Kondo Katsuya , Arimoto Hidenobu , Yamada Yukio

    … This paper presents the visualization of heat and mass transfer of aqueous solutions in microchannels by using the simultaneous imaging method of the temperature and solute concentration. … These two reagents are supplied into two inlets of a Y-shaped rectangular microchannel at several different flow rates. …

    The Proceedings of the Thermal Engineering Conference 2013(0), 165-166, 2013

    J-STAGE 

  • 1111 Geometric effect on mixing with polymer solution in microchannels  [in Japanese]

    ARAI Masato , NARUMI Takatsune

    … water and polymer solution in microchannels.We have utilized T-shaped microchannels which have contraction-expansion parts with five asymmetric rectangular block gates and observed the mixing procedure.Dyed water and a dilute aqueous solution of polyethylenoxide(PEO) of 10ppm,30ppm,50ppm and 100 ppm by weight were mixed in the tests.In microchannels,the polymer solution caused unstable vortexes before the rectangular gates and the instability of …

    The Proceedings of the Fluids engineering conference 2012(0), 429-430, 2012

    J-STAGE 

  • Flux characteristics of cell culture medium in rectangular microchannels

    FENG Zhonggang , FUKUDA Shuhei , YOKOYAMA Michio , KITAJIMA Tatsuo , NAKAMURA Takao , UMEZU Mitsuo

    J Artif Organs 14(3), 238-244, 2011-09-01

    Ichushi Web  References (21) Cited by (1)

  • Holdup and Flow Patterns of Horizontal Gas-Liquid Two-Phase Flow in Flat Rectangular Microchannels  [in Japanese]

    IDE Hideo , SATONAKA Kentaro , FUKANO Tohru

    混相流 = Japanese journal of multiphase flow 24(5), 611-618, 2011-03-15

    References (12)

  • Holdup and Flow Patterns of Horizontal Gas-Liquid Two-Phase Flow in Flat Rectangular Microchannels  [in Japanese]

    IDE Hideo , SATONAKA Kentaro , FUKANO Tohru

    … Experiments were made to clarify the mean void fraction, the mean holdup, the velocity of liquid slug and the flow patterns of air-water two-phase flow in horizontal flat rectangular microchannels with the dimensions of the width and depths of 1.0 x 0.1 mm and 1.0 x 0.2 mm, respectively. …

    JAPANESE JOURNAL OF MULTIPHASE FLOW 24(5), 611-618, 2011

    J-STAGE 

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