Numerical and experimental study of electrostatic charge in gas-solid fluidized beds
Résumé
Electrostatic charges have been one of the major issues in gas-solid fluidized beds, including wall fouling due to particle accumulation on the walls, defluidization, security issues like sparks and dust explosions, etc. At a molecular scale, the particle-wall or particle-particle contact generates electrons transfer, inducing a charge on each particle. As a result, the surrounding gas carries an electromagnetic field which results in an electromagnetic force known as Lorentz force. The aim of this work is to model this force and take its contribution into account in the momentum equation. In this work, a tribocharging model coupled with the multi-fluid model is proposed in an Eulerian approach to model the phenomenon. The numerical simulations will be carried with NEPTUNE_CFD to test the model. An experimental setup is build to form an accurate database for comparison with simulations. It will also help to adjust the model parameters.
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