Fluid filling into micro-fabricated reservoirs

F. G. Tseng*, I. D. Yang, K. H. Lin, K. T. Ma, Ming-Chang Lu, Y. T. Tseng, C. C. Chieng

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

40 Scopus citations


This study reports that the success of reservoir-filling strongly depends on the designs of the hydrophilic wall surface and the well shape/size of the flow network. The idea is illustrated both by experiments and numerical simulations: micro-particle-image-velocimetry (μ-PIV) system is setup to monitor the process of a liquid slug moving in and out of the micro-reservoir and numerical computations are performed by solving first principle equations to provide the details of the flow process. The cross-check between measurements and computations validate the computations. Numerical computations solve conservation equations similar to homogeneous flow model used in two phase flow calculation in cooperation with volume-of-fluid (VOF) interface tracking methodology and continuum surface force (CSF) model. The simulations show that wall surface property as hydrophilic/hydrophobic is a dominating factor in filling processes of reservoirs of various shapes. A flow system consisting of micro-channels and micro-wells is fabricated using MEMS technology to demonstrate the filling process and validate numerical simulation. The agreement between measurement and computation helps to fully understand the process.

Original languageEnglish
Pages (from-to)131-138
Number of pages8
JournalSensors and Actuators, A: Physical
StatePublished - 1 Apr 2002
EventTransducers'01 Eurosensors XV - Munich, Germany
Duration: 10 Jun 200114 Jun 2001


  • Computational model
  • Hydrophilic
  • Micro-reservoir
  • Surface tension

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