Multicomponent Particle Type for Droplets, CFD Simulation Ansys Fluent Training

Multicomponent Particle Project Description

In this project, the Multicomponent particle type for droplets has been investigated by Ansys Fluent software. We used the one-way DPM to simulate the discrete phase. 

Geometry & Mesh

The 3D geometry of this project has been produced with Spaceclaim software. The length of the computational area is 100 mm, and its height & width is 20 mm.

Mesh is created with  Ansys Meshing software and the mesh type is unstructured. The number of cells is 56245.

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.
• We ignored the gravity effect.

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

Models
Viscous model		K-w SST
Discrete phase		on
	particle treatment	unsteady particle tracking
	material in injection	Hydrogen_peroxide_water
	particle type in injection	multicomponent
	injection type	cone
Boundary conditions
Inlet	Draying_air	Velocity inlet
	velocity magnitude	0.2m.s-1
	discrete phase BC type	Escape
	Thermal	450k
Outlet		Pressure outlet
	gauge pressure	0Pascal
	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

Multicomponent particle Results

In this simulation, which is injected by an injector droplet of two mixed species, which is water and hydroperoxide, the type of evaporative water is defined and the second type without evaporation is considered for this reason. As it is clear from the results, the evaporation of a species can be seen in the droplets, and the decrease in the diameter of the droplets can be seen.