In the present work, liquid-liquid flow patterns positioned 40 mm downstream the inlet of microchannels were experimentally investigated, including the effect of hydraulic diameter (Dh), liquid properties, aspect ratio of cross section (a) and inlet configuration. Deionized water, butanol, toluene and hexane were selected as probe fluids with water as the continuous phase. Cross-inlet microchannels of 200 μm * 200 μm (Dh = 200 μm), 400 μm * 400 μm (Dh = 400 μm), 600 μm * 600 μm (Dh = 600 μm) and 600 μm * 300 μm (Dh = 400 μm) as well as a T-inlet microchannel of 600 μm * 300 μm (Dh = 400 μm) were tested. For the tests in the microchannels of Dh = 600 μm and 400 μm, the superficial velocities of the dispersed phase and continuous phase varied between 0.3 mm/s and 12 mm/s and between 0.2 mm/s and 50 mm/s, while in the microchannel of Dh = 200 μm the superficial velocities of the dispersed phase and continuous phase ranged from 0.3 mm/s to 21 mm/s and from 0.2 mm/s to 150 mm/s. Annular flow, deformed interface flow, slug flow, intermittent flow, droplet and slug train flow and droplet flow were detected in the experiment. It shows that flow patterns depend on the hydraulic diameter, liquid properties, inlet configuration and aspect ratio significantly. Dimensionless analysis was employed to develop universal flow pattern maps regardless of the hydraulic diameter and liquid properties. It is indicated that an acceptable universal flow pattern map was derived based on the redefined dimensionless number Rei0.2 *Wei0.4, especially for the boundaries of the slug-droplet transitions, which are independent on the hydraulic diameter to some extent. The other dimensionless number Wei*Ohi worked rather effectively to develop a universal flow pattern map independent on liquid properties. The boundaries of the flow pattern transitions in different liquid-liquid flow almost overlap with each other.
Skip Nav Destination
ASME 2017 Heat Transfer Summer Conference
July 9–12, 2017
Bellevue, Washington, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-5789-2
PROCEEDINGS PAPER
Liquid-Liquid Flow Patterns in Microchannels Available to Purchase
Mehdi Sattari Najafabadi,
Mehdi Sattari Najafabadi
Isfahan University of Technology, Isfahan, Iran
Search for other works by this author on:
Bengt Sunden
Bengt Sunden
Lund University, Lund, Sweden
Search for other works by this author on:
Zhen Cao
Lund University, Lund, Sweden
Zan Wu
Lund University, Lund, Sweden
Mehdi Sattari Najafabadi
Isfahan University of Technology, Isfahan, Iran
Bengt Sunden
Lund University, Lund, Sweden
Paper No:
HT2017-4729, V002T10A013; 9 pages
Published Online:
October 18, 2017
Citation
Cao, Z, Wu, Z, Sattari Najafabadi, M, & Sunden, B. "Liquid-Liquid Flow Patterns in Microchannels." Proceedings of the ASME 2017 Heat Transfer Summer Conference. Volume 2: Heat Transfer Equipment; Heat Transfer in Multiphase Systems; Heat Transfer Under Extreme Conditions; Nanoscale Transport Phenomena; Theory and Fundamental Research in Heat Transfer; Thermophysical Properties; Transport Phenomena in Materials Processing and Manufacturing. Bellevue, Washington, USA. July 9–12, 2017. V002T10A013. ASME. https://doi.org/10.1115/HT2017-4729
Download citation file:
30
Views
Related Proceedings Papers
Related Articles
Large Convective Heat Transfer Enhancement in Microchannels With a Train of Coflowing Immiscible or Colloidal Droplets
J. Heat Transfer (November,2010)
Experimental Study of Air-Water Interaction in Presence of Powdered Wax Inside Simulated Gas Distribution Channel of a Proton Exchange Membrane Fuel Cell
J. Fuel Cell Sci. Technol (August,2009)
Phase Diagram of Pinch-off Behaviors During Drop-on-Demand Inkjetting of Alginate Solutions
J. Manuf. Sci. Eng (September,2019)
Related Chapters
Experimental Characterization of a Cavitating Orifice
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Introduction
Consensus on Operating Practices for the Sampling and Monitoring of Feedwater and Boiler Water Chemistry in Modern Industrial Boilers (CRTD-81)
Insights and Results of the Shutdown PSA for a German SWR 69 Type Reactor (PSAM-0028)
Proceedings of the Eighth International Conference on Probabilistic Safety Assessment & Management (PSAM)