Learning Forum

[bpanchal]

Dear ANSYS Support Team,

I am writing to seek assistance regarding a simulation project I am currently working on using ANSYS software(student). My objective is to simulate the flow of air and particles through a pipe. However, I am encountering challenges with convergence during the calculation process.

I have tried various adjustments to the mesh, boundary conditions, and solver settings, but I have not been able to achieve a stable and converged solution. I would greatly appreciate your guidance on best practices for such simulations, including:

 1. Suitable turbulence models for air and particle interaction.

2. Recommendations for mesh quality and refinement in complex flow scenarios.

3. Solver settings to improve convergence.

If you have any documentation or tutorials related to similar simulations, or if you can assist me directly, it would be immensely helpful.

Thank you for your time and assistance. Please feel free to contact me if further details are needed regarding my setup or objectives.

Looking forward to your guidance and support.

Please let me know as soon as possible.

Best regards,

Brijeshkumar Panchal 

 

[Rob]

Have you looked through the Intro training and any multiphase modules on Learning? 

Following that, which multiphase model is best suited to your application? How turbulent is the flow? How long is the pipe?

[bpanchal]

can you please provide me link for multiphase training modules?

Please provide me as soon as possible.

[Rob]

Learning > Fluids. Left hand menu, second button down. 

[bpanchal]

I have set the following parameters for my simulation in ANSYS Fluent:

1. Type: Pressure-based
2. Velocity Formulation: Absolute
3. Time: Steady
4. Multiphase: Eulerian
5. Viscous Model: k-omega, mixture
6. Discrete Phase: ON
7. Injection Type: Surface
8. Particle Type: Inert
9. Material: PVC powder (560 kg/m3)
10. Diameter Distribution: Rosin-Rammler
11. Discrete Phase: Particle
12. Particle Velocity Magnitude: 16 m/s
13. Total Flow Rate: 0.3 kg/s
14. Min Particle Diameter: 0.000063 m
15. Max Particle Diameter: 0.00025 m
16. Mean Diameter: 0.0001 m
17. Spread Parameter: 1.5
18. Number of Diameters: 10
19. Drag Law: Wen-Yu
20. Inlet Boundary Condition: Velocity Inlet (20 m/s air)
21. Outlet Boundary Condition: Pressure Outlet
22. Initialization: Hybrid
23. Calculation Iterations: 200
24. Pipe Length: 32 to 35 m approx.

Can you confirm if these settings are appropriate for my particle and air flow simulation (fluid fluent)?

Training tutorials are a good option, but I need to resolve this issue urgently.

Please let me know as soon as possible. Your guidance is crucial for me as I cannot proceed further with my simulation without it. 

Thank you.

[Rob]

They're settings. Maybe take a step back. What is the expected flow pattern, ie suspended flow, duning etc? What is the volume fraction? What are you trying to find out? If you watch the Fluent Intro videos on Learning you'll see how we plan a CFD model before going near the software. 

 

[bpanchal]

Is the 'Introduction to ANSYS Fluent' training tutorial sufficient, or are there other tutorials available that would be more helpful?

 

[Rob]

Pretty much everything in Learning and Help will be useful. But I'd start with the Intro module(s) and work from there. 

[bpanchal]

Dear ANSYS Support Team,

I am encountering an issue with the automatic report generation in ANSYS Fluent. Despite modifying the geometry view in the Graphics Window and ensuring synchronization of all views, the report does not reflect these changes. Instead, the report seems to use a default geometry view, ignoring the adjustments made in the visualization window.

Details of the Issue:

• Software Version: [Insert Fluent version, e.g., ANSYS Fluent 2024 R2]
• Steps Taken:
  1. Adjusted the geometry view manually (e.g., rotated, zoomed, and panned the view).
  2. Synchronized all window views using the View menu.
  3. Generated the report using the automatic report generation feature.
  4. Observed that the geometry view in the report remains unchanged, reverting to a default perspective.

Expected Behavior:

The report should capture and display the geometry view as set in the Graphics Window during the report generation process.

Questions:

1. Is there a specific step or setting to ensure the active view is captured in the report?
2. Can the default geometry view in the report be customized or overridden with a manual selection?
3. Could this behavior be related to a bug or a missing configuration in the software?

[bpanchal]

Dear ANSYS Support Team,

I am encountering an issue with the automatic report generation in ANSYS Fluent. Despite modifying the geometry view in the Graphics Window and ensuring synchronization of all views, the report does not reflect these changes. Instead, the report seems to use a default geometry view, ignoring the adjustments made in the visualization window.

Details of the Issue:

• Software Version: [Insert Fluent version, e.g., ANSYS Fluent 2024 R2]
• Steps Taken:
  1. Adjusted the geometry view manually (e.g., rotated, zoomed, and panned the view).
  2. Synchronized all window views using the View menu.
  3. Generated the report using the automatic report generation feature.
  4. Observed that the geometry view in the report remains unchanged, reverting to a default perspective.

Expected Behavior:

The report should capture and display the geometry view as set in the Graphics Window during the report generation process.

Questions:

1. Is there a specific step or setting to ensure the active view is captured in the report?
2. Can the default geometry view in the report be customized or overridden with a manual selection?
3. Could this behavior be related to a bug or a missing configuration in the software?