Hello Everyone!!
I am currently working on a model for renewable energy harvesting using ocean wave energy in Ansys fluent. I have a design ready along with a UDF for a moving component. But when I define the dynamic mesh and try to run the calculation, I am shown an error of negative volume detected. Can anyone give a solution to this error?
Probably too large a time step compared to the mesh deformation. Do you use remeshing or just smoothing?
Negative volumes often occur due to mesh quality issues or improper boundary conditions. Here are a few things you can check:
Remember, it might take a combination of these steps to resolve the issue. Start with the most likely culprits and work your way through. If you encounter any specific error messages during the simulation, those could provide additional clues about the root cause. Good luck and may your simulations be free of negative volumes!
Krystian Jędrzejczak I have tried reducing the timestep to 1e-8 but still the error pos up. I use remeshing as a parameter for dynamic meshing.
Kristaq Hazizi Thank you for your suggestions and feedback. I will try combinations of the inputs that you have suggested and simulate an error-free result.
Hello Bikiran Kalita ,
The problem is that your mesh and the dynamic mesh method you used are not consistent. It is complicated to explain what you should do for this structured mesh. So I suggest that you change the grid to an unstructured one and use the Smoothing+Remeshing method.
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