Abrasive Fluid Jet, CFD Simulation ANSYS Fluent Training

$121.00 Student Discount

In this project, an abrasive fluid Jet has been simulated by ANSYS Fluent software.

This product includes Geometry & Mesh file and a comprehensive Training Movie.
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Description

Abrasive Fluid Jet Description

The present simulation is about a fluid jet with abrasive particles via ANSYS Fluent. This process is used to cut hard materials such as metals, stones, composites, plastics, etc., and remove wire sheaths and pleats. The working mechanism of these systems is such that a beam of fluid moves at high speed towards the desired metal surfaces for cutting work.

Particles of an abrasive are injected into this path of the fluid to hit the surfaces with the fluid at high speed, and as a result, the cutting process takes place from the surfaces.

The most important advantage of this cutting method is that it does not need heating; because thermal cutting processes cause the desired material to melt or burn. In this project, a zone for fluid jet movement is designed; thus, the fluid jet with the abrasive material makes contact with a curved metal surface.

Oil has been used to create fluid jets, and sand particles have been used as abrasive particles. Oil enters the model as a continuous fluid at 23 m/s. The discrete phase model (DPM) is also used to define the motion of abrasive particles.

The discrete phase is used when discrete particles move in a continuous environment; in other words, the solution perspective changes from Eulerian to Lagrangian. Also, since abrasive particles cause abrasion on the desired surfaces, the erosion model must be activated.

Geometry & Mesh

The present geometry is designed in a 3D model via Design Modeler. The computational zone is the space around a curved surface to which the fluid flows from a circular cross-section.

abrasive

The mesh of the present model has been done via ANSYS Meshing. Mesh is done unstructured, and the number of production cells is equal to 924058.

abrasive

Set-up & Solution

Assumptions used in this simulation:

  • pressure-based solver is used.
  • The present simulation is unsteady.
  • The gravity is applied to the model, and the gravitational acceleration is defined as 9.81 m.s-2.
Models
Viscous k-epsilon
k-epsilon model realizable
near-wall treatment standard wall treatment
Discrete Phase Model On
interaction with continuous phase on
physical model erosion/accretion
Injection On
injection type surface
injection surface inlet
diameter 0.00015
mass flow rate 0.046 kg.s-1
Boundary conditions
Inlet Velocity  Inlet
velocity magnitude 23 m.s-1
discrete phase BC type escape
Walls Wall
wall motion stationary wall
discrete phase model conditions erosion/accretion
erosion models Generic, Finnie, Mclaury, Oka, DNV
Outlet Pressure Outlet
gauge pressure 0 pascal
discrete phase BC type escape
Methods
Pressure-Velocity Coupling SIMPLE
pressure second order
momentum second order upwind
turbulent kinetic energy second order upwind
turbulent dissipation rate second order upwind
Initialization
Initialization methods standard
gauge pressure 0 pascal
velocity (x,y,z) 23 m.s-1

Abrasive Fluid Jet Results

After calculation, 2D and 3D contours related to pressure, velocity, and DPM density are obtained. The particle tracking based on residence time is also obtained. The results show that the fluid flow becomes a jet of fluid as the cross-sectional area decreases and then, along with discrete sand particles, strikes the curved surfaces at high speed and pressure, thus causing an erosion process on the surfaces.

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