General Mechanical

General Mechanical

Confusing converging/non-converging FSI outputs in System Coupling

    • El_Manguangua

      Hi! I hope you are all doing great! I know this post is a bit long, but I also find my situation very interesting, I hope some of you may find the time to fully read it and hopefully give me some guidance on it, for which I thank you in advance!

      I am currently working on a project that involves studying Fluid-Structure Interaction (FSI) between air (the fluid) and an aircraft wing (which is the structure). I first study the steady interaction between those two, using the "Static Structural" module for the wing, the "Steady" option in fluent, and I couple both using system coupling. Where I must set both a minimum and a maximum number of iterations, those being (currently) 1 iteration and 14 iterations, respectively.

      The strange thing occurs in System Coupling, where I obtain some contradictory information in the output:

      First of all, the convergence target for both participants (Fluent and Static Structural) is an RMS change of 0.01 (1.00E-002), now, take a look at the results of the first iteration:

    • Keyur Kanade
      Ansys Employee
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