Electrohydrodynamics of droplets and jets in multiphase microsystems.

Area of Science:

• Physics
• Microfluidics
• Engineering

Background:

• Electrohydrodynamics (EHD) is a key technique for manipulating micro-scale liquids.
• Electric stress drives droplet actuation, generation, coalescence, and jet control in microsystems.

Purpose of the Study:

• To review the current understanding of dynamic regimes for electrically driven drops and jets in multiphase microsystems.
• To discuss experimental descriptions, force interplay mechanisms, and instabilities.
• To provide conditions for controlled regime transitions and highlight emerging phenomena.

Main Methods:

• Literature review of experimental studies on electrohydrodynamics in microsystems.
• Analysis of force interplay, instabilities, and scaling arguments.
• Discussion of phenomena influenced by interfacial properties and geometric confinement.

Main Results:

• Summary of dynamic regimes for electrically driven droplets and jets.
• Identification of mechanisms governing force interplay and instabilities.
• Presentation of conditions for controlled transitions between regimes.

Conclusions:

• Electrohydrodynamics offers promising methods for precise liquid manipulation in microsystems.
• Understanding dynamic regimes and instabilities is crucial for controlling electrically driven drops and jets.
• Emerging phenomena in EHD warrant further investigation for advanced microfluidic applications.