manual mesh settings- MultiZone blocking decomposition failed

- February 10, 2020 at 4:36 pm
  
  ghassan.abusultanah
  Subscriber
  
  I'm trying to mesh a large Air volume with small openings but I get a mesh failed
  
  output message In "messages" tab
  
  "Mesh requires attention.
  
  1. MultiZone blocking decomposition failed."
  
  What could cause this this issue ? and how I can solve it ?
- February 11, 2020 at 6:33 am
  
  subashni.satish
  Forum Moderator
  
  Hello Ghassan. AbuSultanah
  
  Based on the blocking approach, the meshing function automatically tries to decompose the geometry into blocks and attempts to generate a hex mesh.
  
  It could help if you could split the geometry(volume) in a way such that blocks are created.
  Please ensure that the opposite faces of these blocks are mappable to ensure smooth hex mesh.
- February 11, 2020 at 2:45 pm
  
  ghassan.abusultanah
  Subscriber
  
  Subashni This simple 100'x100' hanger, with supply Air from the front and Exahust from the top as shown in attached picture
- February 13, 2020 at 9:51 am
  
  subashni.satish
  Forum Moderator
  
  Hello Ghassan. AbuSultanah
  
  I created a geometry quite similar to your image and made a few splits as shown in the attached image and mesh task was successful.
  
  You may apply similar splits to your geometry and give it a try.
- February 14, 2020 at 1:28 pm
  
  ghassan.abusultanah
  Subscriber
  
  Subashni
  
  The mesh for solid is created successfully but not for the Air Volume Inside. Could you please share with me the mesh settings you are using ? Please see the picture below for the mesh I got for the solid part.
- February 17, 2020 at 5:21 am
  
  subashni.satish
  Forum Moderator
  
  Hello Ghassan. AbuSultanah
  
  I just created a solid based on the image shared by you. I would be able to help you better with the mesh settings if you could share your model with me.
  
  If your model is proprietary I can share the ANSYS Secure Transfer link to share the model.
  - February 17, 2020 at 1:26 pm
    
    ghassan.abusultanah
    Subscriber
    
    Subashni Yes, Please send me Secure Transfer Link
- February 18, 2020 at 4:44 am
  
  subashni.satish
  Forum Moderator
  
  Hi Ghassan. AbuSultanah
  
  I have shared the Secure Transfer link.
- February 25, 2020 at 9:20 am
  
  subashni.satish
  Forum Moderator
  
  Hello Ghassan. AbuSultanah
  
  I have not received any model from you.
  Are you facing any difficulties using Secure Transfer?
  - February 25, 2020 at 1:43 pm
    
    ghassan.abusultanah
    Subscriber
    
    Subashni this is issue is solved, Thanks!