FSI- mesh updating takes forever

- November 21, 2019 at 5:41 pm
  
  1993saurav
  Subscriber
  
  hello,
  
  I am running a FSI model with ALE . At a certain point during the simulation,I notice that fluent takes a lot of time for the mesh to update and eventually gets stuck. Sometimes,it gives a negative cell volume but mostly it's just stuck and I have to force close fluent to troubleshoot and restart the sim.I have noticed that enabling the sizing function overcomes some of this issue but again the same problem recurs after a few time step.To briefly summarize my model, its an aortic valve whose leaflets open and close and this issue persists when the valve leaflets are trying to close or get back to its starting position. I have a velocity inlet and pressure outlet.
  
  thanks
- November 22, 2019 at 11:44 am
  
  Rob
  Ansys Employee
  
  Check the cell count and gap sizes. You may be trying to add too many cells.
- February 20, 2020 at 10:44 am
  
  nindoumon
  Subscriber
  
  Hello.
  
  Have you solved your problems?
  
  Actually, I also met some problems like you.
  
  Could you please give me some advice.
  
  Thank you.
  
  My problem page:https://forum.ansys.com/forums/topic/update-failed-for-solution-component-in-system-coupling-2-way-fsi-of-aortic-valve-simulation/
- February 21, 2020 at 9:26 am
  
  Ankusham
  Subscriber
  
  hello,
  
  i am also working on heart valve design. In my case during system coupling large deformation is encountered in the leaflet section. in one way fsi my model is working fine but in case of two way fsi this problem is encountered. i am also not able to incorporate ALE in my problem.
  
  could you please give some tips.
  
  Thank you
  
  my problem page is https://forum.ansys.com/forums/topic/arbitrary-lagrangian-eulerian-method/?order=all#comment-4baf9e55-15fd-4361-9601-ab680097ea61

Viewing 3 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