An industry-scale modeling for the turbulence agglomeration of fine particles

Abstract

Turbulence-induced agglomeration of fine particles/droplets in aerosol is important in various industrial and natural processes. Despite abundant theoretical and numerical studies on turbulent collision kernels, convincing numerical methods for industry-scale applications are still lacking. In this work, we develop a mixed Eulerian-Lagrangian model for the modeling of turbulence-induced agglomeration of fine particles/droplets. As advantages over Sommerfeld's model, the present model searches for real collision pairs based on a new mesh-independent method and uses appropriate turbulent collision kernels to calculate the collision frequencies. Benchmark simulations are carried out and compared with the results provided by the well-characterized experiment by Duru et al.

Numerical simulation of micron and submicron droplets in jet impinging

“…In this simulation, a meshindependent turbulent collision model was applied by user-defined function (UDF). For details, see Zhang et al 18 and Xu et al 21 .…”

“…For turbulence-induced agglomeration of fine particles, fictitious collision partners were used by Oesterle and Petitjean 19 and Sommerfeld. 20 Xu et al 21 In this work, the deposition of liquid droplets onto a wall in an impinging turbulent air jet was simulated. The flow structures of the confined turbulent air jet flow were analyzed and the relationships between the flow filed and the deposition position of the droplets were shown.…”

High resolution characteristics of turbulence tied of a fish farm structure in a tidal environment

“…Recently, Xu et al (2015) showed that vertical mixing plays a key role in the hydrodynamic environments of the sea-cage farms. Eddies can be generated in the wake or in different part of the cages.…”