Cyclone with the Motion of Particles, Ansys Fluent CFD Simulation Training

Cyclone Project Description

In this project, the motion of particles in a cyclone has been simulated by Ansys Fluent software. We used the one-way DPM to simulate the discrete phase. A cyclone is a device used to separate particles from gas and has many applications in industry.

Geometry & Mesh

The 3D geometry of this project has been produced with SpaceClaim software. The length and width of the computational area is 101 mm, and its height is 363 mm.

Mesh is created with ICEM CFD software and the mesh type is unstructured. The number of cells is 371350.

Cyclone CFD Simulation

To simulate the present model, we consider several assumptions:

• The solver is pressure-based.
• The current simulation is unsteady in terms of time.
• The gravity effect is equivalent to -9.81 m.s-1.

Here is a summary of the steps for defining the problem and its solution in the following table:

Models
Viscous model		Reynolds stress
Discrete phase		on
	particle treatment	unsteady particle tracking
	material in injection	anthracite
	particle type in injection	inert
	injection type	group
Boundary conditions
Inlet		Velocity inlet
	velocity magnitude	5.9 m.s-1
	discrete phase BC type	escape
Outlet		Pressure outlet
	gauge pressure	0 Pascal
	discrete phase BC type	escape
walls		Wall
	wall motion	stationary wall
	discrete phase BC type	reflect
Solution Methods
Pressure-velocity coupling		simple
Spatial discretization	pressure	second-order
	momentum	second-order upwind
	Modified turbulent viscosity	first-order upwind
	Initialization
Initialization method		hybrid

Cyclone Results

In this simulation, the behavior of particle motion in the cyclone is investigated. It is observed that most of the particles entering from the inlet exit from the lower outlet and air also leaves the upper outlet, and a small number of particles are trapped in the upper part of the cyclone. They are and will continue to rotate forever.