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An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
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Field driven charging dynamics of a fluidized granular bed.
R Yoshimatsu1, N A M Araújo2, T Shinbrot3
1Computational Physics for Engineering Materials, IfB, ETH Zurich, Wolfgang-Pauli-Street 27, 8093 Zurich, Switzerland. ryutay@phys.ethz.ch.
Soft Matter
|July 1, 2016
Summary
This study enhances a model of inductive charging in granular materials. Realistic simulations reveal that surface charge variations significantly impact charging rates by creating shielding effects.
Area of Science:
- Physics
- Materials Science
- Electrical Engineering
Background:
- Previous models simplified inductive charging of identical grains.
- External electric fields were considered in prior studies.
Purpose of the Study:
- To extend existing models of inductive charging.
- To incorporate heterogeneous surface charge distributions, grain rotations, and inter-grain electrostatic interactions.
Main Methods:
- Development of an extended computational model.
- Simulation of agitated granular beds with complex charging dynamics.
Main Results:
- Identified strong heterogeneities in surface charging within agitated granular beds.
- Predicted significant shielding effects caused by charge heterogeneities.
Conclusions:
- Heterogeneous charging dramatically alters inductive charging rates in granular systems.
- The enhanced model provides a more realistic understanding of granular charging phenomena.
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