VOF-Fluid Disappears

    • tolgav13

      Hello everyone,


      I'm trying to simulate fuel tank sloshing by using 2-way FSI. To do so, I use Transient Structural module and Fluent module via System Coupling. I simulated all the wing as shell elements and fuel as solid element to decrease computation time. I give rotation to wing and want to visiualize how fuel reacts to that motion. I simulated rectangular tank before and I succeded but in this simulation I cannot succeed to implement fuel into fuel tank. This is how I modeled wing;

      This is the model of fluid domain;

      This is initial model of fuel with air. 


      As you can see I initialized it with 50% fuel but once the calculations are done, it appears no fuel. I don't know what is the reason. 


      Can you please help me with that?





    • Rob
      Ansys Employee

      Unless you're deforming the structure you can do the motion in Fluent, it'll be quicker.  Missing mass means you have a boundary somewhere, didn't add it in the first place or convergence is poor so it's been lost due to numerical effects. 

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