Mechanism of submicron particle dendrite agglomeration growth and fracture in flow-electric coupling field.

[Display omitted] • Particle agglomerate behavior under electric field is quantitatively analyzed. • Agglomerate' 3D twist visualization was realized under flow-electric field. • Action mechanism of dipole moment on particle agglomerate was further developed. The research developed a new mechanism for particle agglomeration growth and fracture in the flow-electric coupling field. Microscopic visualization experiments reveal an optimum voltage range for controlling agglomerate growth dynamics. Additionally, we observed, for the first time, twisting behaviors of particle agglomerates during the growth and fracture process under the influence of the flow-electric field. A correlation between twist and fracture, varying with the increase in applied voltage, was identified. Moreover, we identified two distinct agglomeration modes: dendritic and chain agglomerates, each exhibiting unique growth characteristics. We discovered that the growth, twisting, and fracture of inclined dendritic agglomerates are influenced by two components of the electric dipole moment: the axial (P g) and radial (P t) components, with the aid of numerical simulation. Chain-like agglomerates exhibit growth followed by fracture. Our findings offer insights into the controlled growth of submicron particle agglomerates in gas phases using electric fields. [ABSTRACT FROM AUTHOR]