Bluff-Body Mild Burner CFD Simulation

$200.00 Student Discount

This project is the CFD simulation of combustion in a bluff body mild burner.

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If you need the Geometry designing and Mesh generation training video for one product, you can choose this option.
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The journal file in ANSYS Fluent is used to record and automate simulations for repeatability and batch processing.
editable geometry and mesh allows users to create and modify geometry and mesh to define the computational domain for simulations.
The case and data files in ANSYS Fluent store the simulation setup and results, respectively, for analysis and post-processing.
Geometry, Mesh, and CFD Simulation methodologygy explanation, result analysis and conclusion
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Bluff-Body Mild Burner CFD Simulation, ANSYS Fluent Training

This project is the CFD simulation of combustion in a bluff-body mild burner by ANSYS Fluent software. In fact, a burner is a device that combines a certain amount of air with fuel in a safe space, converting fuel energy into heat energy, which also produces some gas as a result of this combustion process. The flame produced in the burner is transmitted to the interior of the chamber by two methods of convection and radiation. Therefore, the Radiation (DO) model should also be used in the present model. Also, since the combustion process takes place within the combustion chamber, the Species Transport model is also used.

The way this burner works is that the fuel is sprayed through a special jet inlet into the chamber, and the gas flows symmetrically into the chamber in four directions, thus combining the fuel and air to form the flame. Also, the operating system of the enclosure is that the gas flow path inside the chamber is cyclic and some of it exits the exhaust section and another part of it returns to the enclosure from the same circular path.



There are several assumptions used for the present simulation:

The simulation is Steady-State, the solver is Pressure-Based, and the gravity effect is ignored.

Geometry & Mesh (Bluff-Body Mild Burner)

The 3-D geometry of the present model is designed by the Design Modeler software. Since the present model has a symmetrical structure, only one part of it is drawn at an angle of 90 degrees, and the two lateral surfaces of the present section act as symmetry boundaries. The model consists of three pipes with a small diameter called inlet ducts (two air inlets and one fuel inlet pipe) and one outlet pipe with a small diameter (exhaust).

The meshing of the present model is performed by ANSYS Meshing software. The mesh was unstructured and the element number was 1107286. In the inlet and outlet sections, the boundary layer mesh is used to increase the accuracy of fluid behavior.


CFD Simulation

Here are some summaries of the problem definition and problem-solving steps in the table:

Models (Bluff-Body Mild Burner)
k-epsilon Viscous model
Realizable k-epsilon model
enhanced wall function near-wall treatment
non-premixed combustion Species model
discrete ordinate (DO) Radiation model
on Energy
Boundary conditions (Bluff-Body Mild Burner)
Velocity inlet Inlet type
2 m.s-1 Velocity magnitude air
300 K temperature
1 Internal emissivity
0 Pollutant NO mass fraction
0 mean mixture fraction
0 mixture fraction variance
1 m.s-1 Velocity magnitude fuel
300 K temperature
1 Internal emissivity
0 Pollutant NO mass fraction
1 mean mixture fraction
0 mixture fraction variance
Pressure outlet Outlet type
0 Pa gauge pressure exhaust
1 Internal emissivity
0 Pollutant NO mass fraction
0 mean mixture fraction
0 mixture fraction variance
wall Walls type
0 W.m-2 heat flux outer wall
1 Internal emissivity
opaque BC type
Solution Methods (Bluff-Body Mild Burner)
coupled Pressure-velocity coupling
PRESTO pressure Spatial discretization
second order upwind momentum
second order upwind energy
second order upwind turbulent kinetic energy
second order upwind turbulent dissipation rate
second order upwind pollutant no
second order upwind discrete ordinates
second order upwind mean mixture fraction
second order upwind mixture fraction variance
Initialization (Bluff-Body Mild Burner)
Hybrid Initialization method



  1. Avatar Of Efren Kris

    Efren Kris

    I was wondering to ask you if the simulation models different tank shapes or sizes?

    • Avatar Of Mr Cfd Support

      MR CFD Support

      Thanks for your question.The simulation is highly customizable and can be adapted to various tank shapes and sizes.

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