Learning Forum

[Qing Hao]

I am trying to model artery 2-way FSI, a simple Poiseuille Flow, can be steady first, then Pulsatile. but just cannot make converged. Who can help to look at and tell me what is wrong? I used Transient Structure+Fluent+System Coupling. Thanks

[Rahul]

Hi,

Usually aortic flow is challenging simulation because they can be unstable. Try with more underrealxation or ramp up the load with 'ramping' option.

Are you trying it in WB or Standalone System coupling application?

To diagnose the issue have a look at the system coupling log file (scLog.scl), fluent log file (.trn) and mechanical log file (.out)

Best practices can be found in system coupling manual. Best Practices for Coupled Fluid-Structure Interaction (FSI) (ansys.com)

 

[Rob]

You'll need to post images for staff to be able to help. We're only able to look at posts, we're not permitted to download or receive any files. 

I'm assuming you've checked the Help system for pointers? 

[Qing Hao]

Do you know any good example or tutorial? Thanks

[Rahul]

Here are some tutorials related to system coupling: System Coupling Tutorials (ansys.com).

Also, refer to System Coupling User's Guide (ansys.com) for more information.