Results 211 to 220 of about 145,451 (264)
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Micro-Channels: Reality and Myth
Journal of Fluids Engineering, 2011Many important problems connected to flows in micro-heat exchangers were not studied in sufficient detail. In particular, the governing physical mechanisms are still not well understood for flows in pipes and channels with hydraulic diameter ranging from 5 to 103 μm, which are often defined as micro-tubes or micro-channels.
G. Hetsroni +3 more
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Optimization of Micro Channel Morphology
Heat Transfer, Volume 3, 2006An increasing demand for a higher heat flux removal capability within a smaller volume for high power electronics led us to focus on micro channels in contrast to the classical heat fin design. A micro channel can have various shapes to enhance heat transfer, but the shape that will lead to a higher heat flux removal with a moderate pumping power needs
Aleksander Vadnjal, Ivan Catton
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International Journal of Heat and Mass Transfer, 2005
We consider the problem of liquid and gas flow in micro-channels under conditions of a small Knudsen and Mach numbers, that correspond to continuum model. Data from the literature on pressure drop in circular, rectangle, triangular and trapezoidal micro-channels with hydrodynamic diameter ranging from 1.01 lm to 4010 lm are analyzed.
G. Hetsroni +3 more
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We consider the problem of liquid and gas flow in micro-channels under conditions of a small Knudsen and Mach numbers, that correspond to continuum model. Data from the literature on pressure drop in circular, rectangle, triangular and trapezoidal micro-channels with hydrodynamic diameter ranging from 1.01 lm to 4010 lm are analyzed.
G. Hetsroni +3 more
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Mixing in a Rotating Micro-Channel
Volume 7: Fluid Flow, Heat Transfer and Thermal Systems, Parts A and B, 2010Mixing of liquids in rotating micro-channel is studied as it has important applications in portable diagnostic devices in rotating lab-on-a-chip. The latter utilizes rotation to pump liquid samples and reagents, and to actuate mixing between different liquids during transport in the channel using secondary flow generated from rotation. Experiments have
Wallace Woon-Fong Leung, Yong Ren
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Liquid flow in a micro-channel
Journal of Micromechanics and Microengineering, 2004An experimental study with MPIV (micro particle image velocimetry) flow visualization of incompressible liquid flow in a microchannel is presented. Deionized water served as a working medium. The channel was microfabricated in a PMMA substrate using an excimer laser, and was 115 µm deep, 200 µm wide and 24 000 µm long with a hydraulic diameter of about
Shou-Shing Hsieh +3 more
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Viscous dissipation in micro-channels
Journal of Mechanical Science and Technology, 2007Viscous dissipation effects in circular micro-tubes and rectangular micro-channels were investigated theoretically in a fully developed laminar flow region. From the energy conservation law, simple theoretical equations were derived for the evaluation of the viscous dissipation effect.
D. Han, Kyu-Jung Lee
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Mixing Length in a Micro Channel
AIP Conference Proceedings, 2011Having a very good mixture is a problem in MEMS devices because of their miniaturized dimensions for which the flows are always laminar. The gas flows in micro‐channels are rarefied and characterized by Knudsen numbers in the range of transition flows.
M. Reyhanian, C. Croizet, R. Gatignol
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2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems, 2008
The hollow fiber based haemo dialyzer made and extremely important impact in haemo dialysis practice in the last three decades. Many people with renal diseases were able to improve their life expectancy and maintain a somewhat improved health-lifestyle.
Goran N. Jovanovic +2 more
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The hollow fiber based haemo dialyzer made and extremely important impact in haemo dialysis practice in the last three decades. Many people with renal diseases were able to improve their life expectancy and maintain a somewhat improved health-lifestyle.
Goran N. Jovanovic +2 more
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Journal of Fluid Mechanics, 1995
An experimental and theoretical investigation of low Reynolds number, high subsonic Mach number, compressible gas flow in channels is presented. Nitrogen, helium, and argon gases were used. The channels were microfabricated on silicon wafers and were typically 100 μm wide, 104 μm long, and ranged in depth from 0.5 to 20 μm.
John C. Harley +3 more
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An experimental and theoretical investigation of low Reynolds number, high subsonic Mach number, compressible gas flow in channels is presented. Nitrogen, helium, and argon gases were used. The channels were microfabricated on silicon wafers and were typically 100 μm wide, 104 μm long, and ranged in depth from 0.5 to 20 μm.
John C. Harley +3 more
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This chapter analyzes exponential heat source and induced magnetic field on second-class convection of Casson fluid in a microchannel. The flow is in a vertical microchannel organized by two vertical plates. The study of the natural convection flow of a fluid in the presence of an induced magnetic field has always been of considerable importance due to
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