DOI: 10.1615/TSFP3
SOLID PARTICLE DISPERSION IN AGITATED TANKS BASED ON LES
ABSTRAKT
Large-eddy simulations of the turbulent flow in a mixing tank have been coupled to a Lagrangian description of spherical, solid particles immersed in the flow. The working fluid was water, whereas the solid particles had the properties of glass beads. Simulations were restricted to a lab-scale tank (volume 10−2 m3), and relatively low solids volume fractions (up to 3.6%). Two sets of particles were considered with particle diameter 0.30 mm and 0.47 mm respectively. It appeared to be essential to take particle-particle collisions into account, mainly because of their exclusion effect that prevents unrealistic build-up of particle concentrations closely above the bottom. The simulations give detailed insight in the behavior of the particles, and in the way the liquid flow is altered by the presence of the particles. The frequency and intensity of particle-particle collisions, and particle-impeller collisions have been investigated.