fix Setup Issues in Ansys Fluent Mini Combustion Chamber Simulation (Non-Premixed Combustion) – Need Realistic Temperature Results
Budget: $30 – $250 USD
Project Description:
Hello,
I have a mini combustion chamber simulation in Ansys Fluent 2025 R2 (Student version).
I have already completed:
Geometry creation
Meshing (quality is good, ready for solving)
I am stuck in the Setup phase and need an expert to correct it so the results become physically realistic.
What I did:
Used Non-Premixed Combustion model (PDF approach)
For the two inlets I imported mass-flow values:
0.0277 air
0.000177 fuel
For walls I tried:
Coupled walls
Fixed temperature
Different heat flux values
The problem:
The temperature keeps going unrealistically high (up to 4000 °C in many runs).
residuals are bad
The best result I managed to get was around 2000 °C, but even that is not correct for this chamber.
What I need from you:
Review and correct the inlet boundary conditions (mass flow rates, temperatures, mixture fraction/variance, turbulence specs, etc.). The current 0.0277 and 0.000177 values may be wrong.
Set proper wall boundary conditions (coupled or heat transfer) so heat loss is realistic.
Make sure the non-premixed combustion model is fully and correctly set up (species, PDF table, operating pressure, etc.).
Run the simulation until convergence and deliver realistic temperature distribution (it should be around 1500 max).
Provide clear step-by-step instructions (with screenshots if possible) so I can repeat the process myself.
Budget & Timeline:
I need it completed within 3–5 days maximum
You must use or make sure to be compatible while solving with Ansys Fluent 2025 R2 limitation (Student version) – same as me
If you are an Ansys Fluent combustion expert and have done similar chamber simulations before, please bid with:
Your proposed solution approach
How long it will take
Hello,
I have a mini combustion chamber simulation in Ansys Fluent 2025 R2 (Student version).
I have already completed:
Geometry creation
Meshing (quality is good, ready for solving)
I am stuck in the Setup phase and need an expert to correct it so the results become physically realistic.
What I did:
Used Non-Premixed Combustion model (PDF approach)
For the two inlets I imported mass-flow values:
0.0277 air
0.000177 fuel
For walls I tried:
Coupled walls
Fixed temperature
Different heat flux values
The problem:
The temperature keeps going unrealistically high (up to 4000 °C in many runs).
residuals are bad
The best result I managed to get was around 2000 °C, but even that is not correct for this chamber.
What I need from you:
Review and correct the inlet boundary conditions (mass flow rates, temperatures, mixture fraction/variance, turbulence specs, etc.). The current 0.0277 and 0.000177 values may be wrong.
Set proper wall boundary conditions (coupled or heat transfer) so heat loss is realistic.
Make sure the non-premixed combustion model is fully and correctly set up (species, PDF table, operating pressure, etc.).
Run the simulation until convergence and deliver realistic temperature distribution (it should be around 1500 max).
Provide clear step-by-step instructions (with screenshots if possible) so I can repeat the process myself.
Budget & Timeline:
I need it completed within 3–5 days maximum
You must use or make sure to be compatible while solving with Ansys Fluent 2025 R2 limitation (Student version) – same as me
If you are an Ansys Fluent combustion expert and have done similar chamber simulations before, please bid with:
Your proposed solution approach
How long it will take