Ship Launch in FLUENT, Error: 6DOF object must have positive mass

- March 13, 2019 at 12:53 pm
  
  adbell
  Subscriber
  
  Hi,
  
  I have been trying to simulate a dynamic ship launch in 2D, but having set up my dynamic mesh -6DOF model, regardless of what I input, I always get an error for 6DOF object must have positive mass when I attempt to calculate.
  
  I have modeled the situation as two components of gravity (acting down and along the slipway) and a free surface between two phases at the end of the slipway. Could anyone advise on why I am getting the above error and any possibilities on how to resolve it?
  
  I include a screenshot of my model in my mesh, and my 6DOF settings. The COG of my vessel is at (0,0), this section has not simply been neglected.
  
  Thank you.
- March 14, 2019 at 4:56 am
  
  Keyur Kanade
  Ansys Employee
  
  can you please reduce your mass by 1/10th and check that is giving you trouble.
  
  also please check -
  
  https://www.youtube.com/watch?v=40UR7pFfJGA