Overset meshes in Ansys Fluent 2023 | Overset assembly with three component meshes
Channel: Wolf Dynamics World
Date: 2024-01-27

😏 This is another take of the cylinder case (vortex shedding), which we know and love, but with three component meshes. We also introduce some advanced options in the TUI interface of Fluent, such as, Chimera hole optimization and grid priorities.

🤔 Overset meshes (OM) are also known as overlapping grids, overset composite grids, composite overlapping meshes, chimera meshes, patches grids, composite grids, relaxed multi-block meshes.

😵‍💫 To better follow this tutorial, we advise you to watch first the following presentation,
Let's talk about overset meshes | A general overview with CFD examples
https://youtu.be/6jiDDv9E0L4

Case files (Fluent): 
https://bit.ly/3tRNRVK

Case files (OpenFOAM): 
https://bit.ly/3H8WhuT


👌 Introduction to overset meshes in OpenFOAM and Ansys Fluent:
Quick and dirty Introduction to overset meshes in OpenFOAM-V2312
https://youtu.be/jD5YkqCJajs
Quick and dirty Introduction to overset meshes in Ansys Fluent 2023
https://youtu.be/2719_q7GJ2k


Chapters:
00:00 Introduction
1:44 Launch Fluent as administrator
2:50 What are we going to do?
3:13 Let's read the component meshes and assemble the overset system
7:10 Boundary conditions for overset meshes
8:03 Overset interface
9:38 Let's compute the initial Chimera hole (overset interface)
11:26 Text'User-Interface (TUI) options for overset meshes
12:18 Optimal chimera hole
14:58 Grid priorities
17:20 Let's revisit the case setup - From top to bottom
19:02 Boundary conditions
21:40 Numerical method
22:33 Monitors
23:56 Non-uniform initialization
25:35 Saving frequency
26:23 Time-step and number of iterations
27:16 Off we go!
27:37 Best practices to choose the number of iterations in the iterative PISO method
28:48 The solution
29:05 Let me rant again about Intel Hybrid Architecture
29:39 Let's take a look at the solution
30:36 Qualitative postprocessing - Some colors
32:27 Quantitative postprocessing and signal processing
37:28 Interesting comment about the Cd and Cl signal - The frequency of Cd is twice that of the Cl
38:02 Main takeaways - Final remarks


Useful links:
Ansys Student - Free Software Download
https://www.ansys.com/academic/students/ansys-student


🫡 Old playlist. This was back in 2019 - Pre-pandemic times fellas! 
https://www.youtube.com/playlist?list=PLoI86R1JVvv_rDlODjff5LUWD4WX9G9vc

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