Session EU: Multiphase Flows III
4:10 PM–6:20 PM, Sunday, November 21, 2010
Hyatt Regency Long Beach Room: Regency A
Chair: Federico Toschi, Technische Universiteit Eindhoven
Abstract ID: BAPS.2010.DFD.EU.10
Abstract: EU.00010 : Interfacial flows in micro-channels: flow regimes and transitions
6:07 PM–6:20 PM
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Abstract
Authors:
Majid Ahmadlouydarab
(University of British Columbia)
Peng Gao
(University of British Columbia)
James J. Feng
(University of British Columbia)
We report simulations of gas-liquid flows in periodically patterned micro-channels with grooves and ridges. A diffuse-interface model is used to handle the interfacial motion and the three-phase contact line. A constant body force applies on both components to simulate a pressure-driven flow. Depending on the competition between the driving force and capillary force and the level of liquid saturation, several flow regimes have been observed in the micro-channel, including slug flows with air bubbles, slug flows with water drops, water rivulets alongside air flow and driven sessile drops. We investigate the critical conditions for the transition among the regimes as affected by substrate wettability, initial morphology of the interface, geometry of the micro-channel and viscosity ratio.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.DFD.EU.10