Abstract
We have examined the effects on fluid and particle motion due to solid particles passing around circular obstacles in particulate flows. Particle interaction with internal obstacles, outer boundary and with the fluid is inspected. Eulerian approach using a fixed computational mesh is used across which the solid particles move freely in fluid. Treatment of fluid and particle interaction inside the whole domain is carried using Fictitious boundary method (FBM). A collision model is presented to handle particle-cylinder interactions. The particulate flow is computed using multigrid finite element solver FEATFLOW. Numerical experiments are performed considering different particle positions and different alignment of cylinders (obstacles). Effects on the motion of the particle and on the physical behavior of the fluid-particle system due to the particle-wall, particle-cylinder and particle-fluid interactions has been analyzed.
Highlights
A lot of naturally occurring and manufacturing processes are visible while examining the interaction of particles in fluid such as agglomeration, multiphase flows, sedimentation and granular flows
An underlying knowledge is lacking for the study of such particle interactions with obstacles in a domain which results in different formations of particle trajectories and drag analysis across the obstacles followed by the particle collisions in the modeling of particulate flow [1]
When the falling particle crosses the obstacles, it disturbs the pressure field and disturbs the fluid motion as well as the hydrodynamic drag and lift forces acting on the surface of obstacles
Summary
A lot of naturally occurring and manufacturing processes are visible while examining the interaction of particles in fluid such as agglomeration, multiphase flows, sedimentation and granular flows. In Eulerian approach, the whole domain is covered by the fluid and uses a fixed background mesh which is independent of particle parameters Based on this approach, Joseph and Glowinski proposed a technique [8]. Inoue et al.[23] implanted a technique based on finite difference method in order to find the solution of 2D unsteady compressible Navier-Stokes equation and analyzed the wake achieved by two square obstacles arranged on staggered positions by considering space effect between them in a uniform flow at low Mach numbers. Fictitious boundary method [34] is acquired to achieve the solution of viscous incompressible fluid flow and the moving solid particles, which is a direct simulation technique. The well known Eulerian technique, which is independent of particle shape, number of particles and particle size, is used to solve the problem of fluid and particle system in particulate flow
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