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Plasma Gasification Reactor CFD Simulation

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The present problem simulates the air flow inside a plasma gasification reactor using ANSYS Fluent software.

This ANSYS Fluent project includes CFD simulation files and a training movie.

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Project Description

The present problem simulates the air flow inside a plasma gasification reactor using ANSYS Fluent software. In general, plasma gasification is a process in which organic matter is converted to synthetic gas with the help of plasma. Arc ignited plasma is used to ionize gas and catalyze organic matter into synthetic gas and solid waste. These operations are commonly used as a form of waste remediation and for the evaporation of biomass and hydrocarbons such as coal and petroleum sands.

Fluid flow enters the chamber from two inlets on either side of the reactor at a velocity of 0.1 m.s-1 and a temperature of 2000 K and exits at the top of the reactor at a pressure equal to atmospheric pressure. Also, the side walls of the reactor have a constant temperature equal to 600 K.

Reactor Geometry & Mesh

The present model is designed in two dimensions using Design Modeler software. The model consists of a symmetrical compartment that has two edges as inputs on both sides and one edge at the top as an outlet.


The meshing of the model has been done using ANSYS Meshing software and the mesh type is structured. The element number is 8711. The following figure shows the mesh.


Plasma CFD Simulation

To simulate the present model, several assumptions are considered:

  • We perform a pressure-based solver.
  • The simulation is steady.
  • The gravity effect on the fluid is ignored.

A summary of the defining steps of the problem and its solution is given in the following table:

Viscous k-epsilon
k-epsilon model standard
near wall treatment standard wall function
Energy On
Boundary conditions
Inlet Velocity Inlet
velocity magnitude 0.1 m.s-1
temperature 2000 K
Outlet Pressure Outlet
gauge pressure 0 pascal
Walls Wall
wall motion stationary wall
temperature 600 K
Pressure-Velocity Coupling SIMPLE
Pressure second order
momentum second order upwind
turbulent kinetic energy first order upwind
turbulent dissipation rate first order upwind
energy second order upwind
Initialization methods Standard
gauge pressure 0 pascal
x-velocity -0.06815643 m.s-1
y-velocity -0.0000375 m.s-1
temperature 2000 K


At the end of the solution process, two-dimensional contours related to pressure, velocity and temperature, as well as path lines and velocity vectors are obtained.

All files, including Geometry, Mesh, Case & Data, are available in Simulation File. By the way, Training File presents how to solve the problem and extract all desired results.


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