Domain inside a domain for finer mesh

- July 13, 2023 at 6:54 pm
  
  Vasanth
  Subscriber
  
  I am simulating flow past bluff body. I have created a flow domain(1) and a bluff body. To capture vortex shed from body, I need finer mesh near bluff body and so i created another small domain (2). I did boolean to subtract the bluff body from two domains created. Now the second domain(2) is considered by fluent as 'wall-solid'. I am able to run the simulation and get results for sphere but I am not sure what I am doing is correct or not.
- July 14, 2023 at 8:47 am
  
  Hemantg_17
  Subscriber
  
  Yes, your approach is correct. Please refer to the following course, where similar conditions are used, and in particular, check the mesh lesson.
  CFD Simulation of an FSAE Car | Ansys Innovation Courses
  - July 17, 2023 at 12:03 pm
    
    Vasanth
    Subscriber
    
    Thanks. I will check the video.
- July 14, 2023 at 10:44 am
  
  Rob
  Ansys Employee
  
  Domain 2 should be bounded by interior: I assume you used Share Topology?
  - July 17, 2023 at 12:05 pm
    
    Vasanth
    Subscriber
    
    I did not explicitly give a shared topology option. I will go back and see geometry and mesh again. Thanks for your response.
- July 17, 2023 at 12:10 pm
  
  Rob
  Ansys Employee
  
  Just to clarify. If domain 2 is a body of influence it doesn't need to be linked to the main geometry, if it's been subtracted/split then it does with share topology. The videos/course should cover this.
  - July 18, 2023 at 10:11 am
    
    Vasanth
    Subscriber
    
    Really helpful- I was trying shared topology yesterday but it did not show any shared region. I am using domain 2 as body of influence for finer mesh. Thanks for your reply.

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