The effect of external electric fields on the bubble behavior in fluidized beds has been inadequately investigated. In this work, anthracite and quartz particles were employed as bed materials and a high-speed camera was used to capture the mutual effects between bubbles and charged particles in a two-dimensional fluidized bed with an electric field. The results showed that gas velocity and plate voltage influenced the bubble distribution in the vertical and horizontal directions, respectively. Both the averaged diameter and rising velocity of bubbles increased with the increase of gas velocity and the decrease of plate voltage. As the voltage increased, bubbles tend to rise obliquely, rather than vertically, due to the presence of the external electric field. These findings provide a first insight into the mutual effects between bubbles and charged particles in a two-dimensional fluidized bed with an electric field.
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