NDLI: Effect of Tube Diameters on the Flow Phenomena of Gas-Liquid Two-Phase Flow in Microchannels

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Ide, Hideo Kawaji, Masahiro
Copyright Year	2013
Abstract	The studies on microfluidics have advanced with the use of microchannels in micro bioreactors, applications in biomedical engineering, bioengineering and pharmaceuticals, fuel cells and compact heat exchangers for heating and cooling of micro electro mechanical systems. For a wide application of microchannels, it is very important to elucidate the effect of the tube diameters on the flow phenomena of gas liquid two-phase flow in microchannels. The flow phenomena and the frictional pressure drop of gas-liquid two-phase flow were investigated experimentally by using three kinds of circular microchannels made of fused silica tubes, with inner diameters of 0.1 mm, 0.15 mm and 0.25mm. In these channels, bubbly flow, slug-churn flow, and annular flow were observed. In annular flow, two characteristic flows of ring film flow and disturbed ring film flow were observed. For the 0.25 mm diameter microchannel, several conductance probe sensors were flush mounted to the channel wall in order to measure the very thin mean film thickness or liquid holdup in a microchannel. The flow patterns maps were also made by using the high speed video images and the holdup wave signals. The effects of tube diameter on the flow patterns were investigated.
Sponsorship	Fluids Engineering Division Heat Transfer Division
File Format	PDF
ISBN	9780791855591
DOI	10.1115/ICNMM2013-73096
Conference Proceedings	ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels
Language	English
Publisher Date	2013-06-16
Publisher Place	Sapporo, Japan
Access Restriction	Subscribed
Subject Keyword	Bioengineering Drugs Microelectromechanical systems Heat exchangers Film thickness Flow (dynamics) Waves Microchannels Film flow Bubbly flow Two-phase flow Bioreactors Pressure drop Slug flows Fuel cells Electrical conductance Sensors Signals Heating and cooling Probes Microfluidics Biomedical engineering
Content Type	Text
Resource Type	Article

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