CFD-DEM simulation of the hydrodynamic filtration performance in balaenid whale filter feeding

摘要: Abstract Solid-liquid separation is a key link in environmental chemical and process engineering, including water purification, pollution treatment, etc. Traditional industrial filters are often clogged damaged because they cannot be cleaned or replaced time. Filter-feeders, on the other hand, rarely clogged. Therefore, it of great significance to draw bionic inspiration from biological filtration guide design traditional filters. In this study, computational fluid dynamics (CFD) discrete element method (DEM) coupled model adopted investigate filtering mechanism balaenid whale feeding. model, DEM used for particle Navier-Stokes equation fluid. The effects space shape, as well particle-particle/wall interaction, considered. Then, validated by comparing some crucial information with theoretical results previous literature. Finally, four parameters filter feeding characteristics analyzed, fringe layer permeability, prey incident direction, size shape. show that large random incidence real irregular shape all lead more collisions. Besides, captured prone form an uneven, backward aggregation trend. permeability make trend posterior obvious. However, there no significant differences number at each location different types directions shapes. But variation distribution case not smooth simplified sphere case, which shows increase collisions changes trajectories particles extent. This study provides new idea solid-liquid field.