Ship roll – damping problem

- October 15, 2023 at 1:10 pm
  
  Sellera
  Subscriber
  
  Hello, I'am modeling an ship roll natural decaiment in Ansys fluent, and validating it with an experimental results of my laboratory.
  My problem is that the ship is not damping as it should be as follows, experimental(orange) and what I obtained in Ansys(blue):
  Any idea on how can I make the results close to each other? Now, I'am working with my pressure coefficient around 1.6 to control better my dynamic mesh(I was 1 before) and I've seen little improvemente in 1.3 to 1.6 so I don't know if if better to try higher values.
- October 18, 2023 at 9:37 pm
  
  Federico Alzamora Previtali
  Ansys Employee
  
  What is the working fluid? Is it the same as for your experiment?
  If working with liquids, I would suggest using Compressible liquid formulation in Materials tab. Sometimes, you may get pressure spikes with incompressible liquids, which may result in the overshoots that we are seeing.

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