Problem with Coupled 2-Way FSI

- May 25, 2022 at 2:31 pm
  
  mohammedlaminemekhalfia
  Subscriber
  
  Dear all.
  
  I tried two way FSI, to plot displacement of this blade tip per time.
  The Fluent has a transient pressure inlet with a step function where at 0.3 I used Static structural.
  the step time was 0.001, the full time was 2 s and the relaxation factor =0.55 for both side.
  I used Ensight to visualize the results
  I have two questions:
  I expected that the result (picture attached) should be a step function not a ramp in the interval between 0.3 and 0.9 ? what would be the reason for that? I performed one way FSI using external data transfer and it seem that the feedback was a step function so why there is this divergence in results between the two methods?
  How to make System coupling GUI work with more than 2 solvers? it is so so low
  with the best regards
- May 30, 2022 at 6:02 pm
  
  Stephen Orlando
  Ansys Employee
  
  Hi Please provide more information about the settings used to set up your case. It's not possible to tell what happened based on the information provided.
  If you want to run a transient simulation, you'll need to use Transient Structural.
  I recommend going over this tutorial in the Ansys documentation that shows a 2-way transient FSI simulation with Fluent and Mechanical. https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v221/en/sysc_tut/sysc_tut_reedvalve_fluent.html
  Steve

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