Meshing error

- February 17, 2021 at 1:39 pm
  
  xykilin
  Subscriber
  
  "The surface mesh is intersecting or close to intersecting, making it difficult to create a volume mesh. Please adjust the mesh size or adjust the geometry to fix the problem."
  
  I am so close to getting this mesh done, only one part is failing. It was created in CREO Parametric and is a boundary blend. This is a ducted fan design with a pattern of a boundary blend for the blades. This error pops up for the originally blended blade only. When I look at the problematic geometry it is one element. What should I do to fix this element? I have no idea what is causing this or how to fix it.
- February 17, 2021 at 3:58 pm
  
  Rob
  Ansys Employee
  
  Check the sizing that you're applying: how does the cell size compare to the size of the gap? n
- February 17, 2021 at 6:52 pm
  
  xykilin
  Subscriber
  
  ,I have re-done the partition of the fluid zone and solved part of the problems. But there is one fluid zone unable to generate quadrilateral mesh. Do you know why?nThanks for your assisstance.nn
- February 18, 2021 at 11:24 am
  
  Rob
  Ansys Employee
  
  Best guess is it's not happy about the node count/edge sizing. Hex mesh is (arguably) better than tets in this application, but I'd be careful with the aspect ratio where you've clustered cells. n
- February 18, 2021 at 2:16 pm
  
  xykilin
  Subscriber
  
  Can you explain it a bit more? I don't really understand that.nMany thanksn
- February 18, 2021 at 2:22 pm
  
  Rob
  Ansys Employee
  
  Sizing settings can mean you're trying to create a poor quality mesh as you force a fixed number of elements. A classic example on a rectangle could be 2 cells on one edge and 30 on the opposite side: with one cell between the two edges the mesh won't be very good. nRe aspect ratio and jumps in cell size, I'll refer you to the various courses available on here and (as an example) the Cornell online course. n

Viewing 5 reply threads

You must be logged in to reply to this topic.

Ansys Innovation Space

Boost Ansys Fluent Simulations with AWS

Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.

Earth Rescue – An Ansys Online Series

The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.

Ansys Blog

Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.

Trending discussions