title: Simulations of shearing of capillary bridges.
abstract: Capillary bridges are considered as the major source of interaction forces acting in wet particulate systems. We study the dynamic shear resistance by using a lattice Boltzmann numerical scheme for a binary fluid. The shear resistance force showed very little dependence on surface tension and contact angle. Instead, the shear resistance is a dynamic phenomenon and a major contributing factor is the distortion of the flow field caused by the presence of interfaces. This distortion of the flow field is geometry-dependent: in smaller diameter bridges the proportion of this distorted flow field becomes larger and it makes a major contribution to the shear resistance force. In other words multiple bridges have an enhancement effect on shear resistance.
authors.affiliation: Fibre Science and Communication Network, Mid Sweden University, Holmgatan 10, SE-851 70 Sundsvall, Sweden. hanna.wiklund@miun.se
authors.forename: H S
authors.initials: HS
authors.lastname: Wiklund
authors.forename: T
authors.initials: T
authors.lastname: Uesaka