A Procedure for the Motion of Particle-Encapsulated Droplets in Microchannels

Y. F. Yap, J. C. Chai, T. N. Wong, N. T. Nguyen, K. C. Toh, H. Y. Zhang, L. Yobas

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A fixed-grid approach for modeling the motion of a particle-encapsulated droplet carried by a pressure-driven immiscible carrier fluid in a microchannel is presented. Three phases (the carrier fluid, the droplet, and the particle) and two different moving boundaries (the droplet-carrier fluid and droplet-particle interfaces) are involved. This is a moving-boundaries problem with the motion of the three phases strongly coupled. In the present article, the particle is assumed to be a fluid of high viscosity and constrained to move with rigid body motion. A combined formulation using one set of governing equations to treat the three phases is employed. The droplet-carrier fluid interface is represented and evolved using a level-set method with a mass-correction scheme. Surface tension is modeled using the continuum surface force model. An additional signed distance function is employed to define the droplet-particle interface. Its evolution is determined from the particle motion governed by the Newton-Euler equations. The governing equations are solved numerically using a finite-volume method on a fixed Cartesian grid. For demonstration purposes, the flows of particle-encapsulated droplets through a constricted microchannel and through a microchannel system are presented.

Original languageEnglish
Pages (from-to)59-74
Number of pages16
JournalNumerical Heat Transfer, Part B: Fundamentals
Volume53
Issue number1
Early online date6 Nov 2007
DOIs
Publication statusPublished - Jan 2008
Externally publishedYes

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Microchannel
microchannels
Microchannels
Droplet
Motion
fluids
Fluid
Fluids
grids
Governing equation
finite volume method
Moving Boundary Problem
particle motion
Rigid Body Motion
Cartesian Grid
rigid structures
Level Set Method
Moving Boundary
Euler equations
Finite volume method

Cite this

Yap, Y. F. ; Chai, J. C. ; Wong, T. N. ; Nguyen, N. T. ; Toh, K. C. ; Zhang, H. Y. ; Yobas, L. / A Procedure for the Motion of Particle-Encapsulated Droplets in Microchannels. In: Numerical Heat Transfer, Part B: Fundamentals. 2008 ; Vol. 53, No. 1. pp. 59-74.
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A Procedure for the Motion of Particle-Encapsulated Droplets in Microchannels. / Yap, Y. F.; Chai, J. C.; Wong, T. N.; Nguyen, N. T.; Toh, K. C.; Zhang, H. Y.; Yobas, L.

In: Numerical Heat Transfer, Part B: Fundamentals, Vol. 53, No. 1, 01.2008, p. 59-74.

Research output: Contribution to journalArticle

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