Modeling and simulation of a rollerball microfluidic device

Luis R. Rojas-Solórzano, Shelley L. Anna, Bourtal Bradeddine, Cristina H. Amon

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The fluid delivery process through a rollerball device is investigated by means of physical modeling and numerical simulations. The microfluidic device is intended to deliver liquid above a substrate interacting with the surrounding air. While the fluid is delivered, air entrainment occurs through the capillary gap, creating a two-phase liquid-gas mixture whose composition and properties affect significantly the quality of the continuous fluid deposition. For the numerical solution of the 2D two-phase flow governing equations, the finite volume-based finite element method is used with 2nd order time-space schemes for the fully coupled system of equations. The quality of the liquid micro-volume delivery proves to be largely affected by both the speed of the roller and fluid properties. It is found that only under very low speed and some fluid properties, it is possible to guarantee a gas free liquid deposition. Envisioning the potential use of this convenient and popular device in the deployment of microfluid layers or substances at very small quantities with controlled quality, it is apparent the need for handling and channeling out the air entrainment without perturbing the liquid quality.

Original languageEnglish
Title of host publicationProceedings of the 7th International Conference on Nanochannels, Microchannels, and Minichannels 2009, ICNMM2009
Pages705-716
Number of pages12
EditionPART A
DOIs
Publication statusPublished - 2009
Event7th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2009 - Pohang, Korea, Republic of
Duration: Jun 22 2009Jun 24 2009

Publication series

NameProceedings of the 7th International Conference on Nanochannels, Microchannels, and Minichannels 2009, ICNMM2009
NumberPART A

Other

Other7th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM2009
CountryKorea, Republic of
CityPohang
Period6/22/096/24/09

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

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