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Review on Microbubbles and Microdroplets Flowing through Microfluidic Geometrical Elements.

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This review systematizes studies on two-phase flows in microfluidic devices. It focuses on bubble and droplet behavior, including deformation, coalescence, and breakup, crucial for industrial applications.

Keywords:
T-junctionbreakupcoalescenceconstrictioncontractiondeformationmicrobubblesmicrodropletsmicrofluidic geometrical elementstwo-phase flows

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Area of Science:

  • Fluid Dynamics
  • Microfluidics
  • Multiphase Flow

Background:

  • Two-phase flows are critical in numerous industrial applications like power generation and oil/gas extraction.
  • Microfluidic devices with various structures are increasingly used to study complex flow phenomena.
  • Understanding interphase interactions is key to controlling bubble and droplet behavior in these flows.

Purpose of the Study:

  • To review and systematize existing literature on two-phase flows in microfluidic elements.
  • To consolidate knowledge on bubble and droplet dynamics within microstructured devices.
  • To highlight research covering theoretical, experimental, and numerical approaches.

Main Methods:

  • Literature review of gas-liquid and liquid-liquid flows.
  • Inclusion of studies involving Newtonian and non-Newtonian fluids.
  • Analysis of theoretical, experimental, and numerical research methodologies.

Main Results:

  • Identified key mechanisms governing bubble and droplet behavior in microfluidic elements.
  • Focused on deformation, coalescence, and breakup phenomena.
  • Covered a range of microfluidic geometries such as constrictions, contractions, and T-junctions.

Conclusions:

  • A comprehensive understanding of two-phase flow behavior in microfluidics is essential for innovation.
  • This review provides a systematic overview of critical bubble and droplet dynamics.
  • Further research is needed to fully control and optimize these flows for industrial applications.