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Researchers developed a novel, elongated glass micro-model for studying fluid flow. This innovative microfluidic device enables continuous monitoring of fluid distribution, advancing two-phase flow research.

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Area of Science:

  • Fluid Dynamics
  • Microfluidics
  • Materials Science

Background:

  • Micro-models are essential experimental tools for two-phase flow research.
  • Previous micro-models had limitations in depth and fabrication techniques.

Purpose of the Study:

  • To design and fabricate an innovative, elongated, glass-etched micro-model.
  • To demonstrate its utility in studying fluid flow dynamics.
  • To calibrate and validate a pore-network model using experimental data.

Main Methods:

  • Fabrication of a 5 × 35 mm(2) glass micro-model with 43-micron depth using dry etching.
  • Visualization using a novel setup for continuous fluid distribution monitoring.
  • Quasi-static drainage experiments to determine capillary pressure and phase saturation.
  • Calculation of intrinsic permeability from flow rate and pressure gradient data.

Main Results:

  • Successful fabrication of a glass micro-model with unprecedented depth and dimensions using dry etching.
  • Continuous monitoring of fluid distribution throughout the micro-model.
  • Acquisition of equilibrium data relating capillary pressure to phase saturation.
  • Calculation of the micro-model's intrinsic permeability.

Conclusions:

  • Glass-etched micro-models are valuable tools for single and multi-phase flow studies.
  • The developed micro-model and setup enable detailed analysis of fluid dynamics.
  • Experimental data successfully calibrated and validated a pore-network model.