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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/4817

Title: Experimental and numerical studies of emulsion formation in a microfluidic T-junction
Authors: Mbanjwa, MB
Land, K
Jewell, LL
Gledhill, IMA
Keywords: Emulsification
Emulsion
Microfluidics
Microchannels
Monodisperse
Microtechnologies
Modelling
Simulation
Computational fluid dynamics
AfriCOMP 2011
Issue Date: Jan-2011
Citation: Mbanjwa, MB, Land, K, Jewell, LL and Gledhill, IMA. 2011. Experimental and numerical studies of emulsion formation in a microfluidic T-junction. AfriCOMP11: Second African Conference on Computational Mechanics, University of Cape Town, Cape Town, 5-8 January 2011, pp 4
Series/Report no.: Conference Paper;
Abstract: The production of water-in-oil (w/o) emulsions in T-junction microfluidic channels was studied through experiments and computational fluid dynamics (CFD). W/o emulsions were produced in the microchannels from deionised water and mineral oil. The interfacial tension of the system was controlled to ~ 0.003 N/m using oil-soluble surface active agent (surfactant). A 2-dimensional (2D) CFD model was setup for simulation of the generation of w/o emulsion in a 200µm wide T-junction microchannel. COMSOL Multiphysics, a program based on the finite element method (FEM), was used. The fluid-fluid interface was modelled using the conservative level set method (LSM), where the oil-water interface was implicitly represented by level set function. The simulated droplets differed in size from the droplets observed in experiments. The deviation between the CFD model and experiments was attributed to the modelling approach which excluded the variations in contact angle between the two fluids and the channel surface which occur in experimental conditions.
Description: AfriCOMP11: Second African Conference on Computational Mechanics, University of Cape Town, Cape Town, 5-8 January 2011
URI: http://hdl.handle.net/10204/4817
Appears in Collections:Nanotechnology
Advanced mathematical modelling and simulation
Manufacturing science and technology
General science, engineering & technology

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