Effects of Polarization on Particle-Laden Flows.

Area of Science:

• Fluid dynamics
• Particle-laden flows
• Electrically charged particles

Background:

• Understanding particle behavior in gas flows is crucial for industrial applications.
• Electrical charging and polarization significantly influence particle dynamics.

Purpose of the Study:

• To investigate the impact of electrical charging and polarization on dielectric particle behavior in gas flows.
• To identify distinct flow regions based on particle charge and polarizability.

Main Methods:

• Computational simulations of particle-laden flow.
• Varying levels of electrical charging and particle polarization were simulated.

Main Results:

• Three distinct flow regions were identified.
• Low charge/polarizability resulted in symmetric, nonmeandering flow.
• High charge/polarizability led to particle sheets near walls or localized particle-rich regions with meandering gas flow.

Conclusions:

• Particle polarization can qualitatively alter particle-laden flow characteristics.
• Tribocharging effects are significantly modified by particle polarization.