Structural evolution and breakage of dense agglomerates in shear flow and Taylor-Green vortex

Deagglomeration of cohesive particles by turbulence

“…In this work, we follow Ruan et al. (2020) and obtain by solving the following nonlinear equation where the fractal prefactor is The initial clump generated by centripetal packing has values and . The total volume of the clump is defined by , which is evaluated at each simulation timestep in order to quantify the evolution of and .…”

“…Note that for simple shear flow where is not well defined, it has been found that the breakage outcome is instead characterized by (Ruan et al. 2020). The simulations performed in the present study indicate that the characteristic length scale associated with aggregate breakup is when .…”

“…2015; Ruan et al. 2020). First, particles are initially randomly distributed within in a spherical region without overlap.…”

“…2010). Several models have recently been developed for deagglomeration due to rotary stress in simple shear flows (Dizaji, Marshall & Grant 2019; Ruan, Chen & Li 2020; Vo et al. 2020).…”

Collision-induced breakage of agglomerates in homogenous isotropic turbulence laden with adhesive particles

“…In DEM, translational and rotational motions of all particles in an agglomerate are integrated with a sufficiently small time step so that the deformations at the contact region are resolved. Based on DEM simulations, a criterion for shear-induced breakage of hyperstatic agglomerates has been proposed, which is valid across a wide range of shear stress and interparticle adhesion values (Ruan, Chen & Li 2020).…”