Learning Forum

[as4934]

Hello,

I am trying to simulate a sphere that is floating on the surface of the water. However, when I go to solve the simulation in the hydrodynamic diffraction module, I get the error: "LIDGEN:MAXIMUM NUMBER OF ELEMENTS EXCEEDEDDURING INTERNAL LID GENERATION." "LIDMES:FAILED TO CREATE INTERIOR LID FOR STRUCTURE#1 ; IT MAY BE NECESSARY TO USE SMALLER LID_SIZE." "READING DECK 2:EXTERNAL GROUP NUMBER 40 HAS NO VALID ELEMENTS." "MATERIAL GROUP# 98000 FOR STRUCTURE # 1 DOES NOT EXIST." "GEOMETRY GROUP# 98000 FOR STRUCTURE # 1 DOES NOT EXIST.". I have tried lid element size of 0.001 m through 5 m and none of them seem to work. I have also attached an image of the errors and the project files here. Any help is very appreciated. Thank you!

 

[NVN NAMMA]

Could you please describe more on your model, where you are using the internal lid in your sphere?

[as4934]

It is just a sphere that is supposed to be floating on water. I have attached an image. I was under the impression that I should use an internal lid if my structure breaks the surface of the water.

 

Thank you for your help.

 

[NVN NAMMA]

Slice the geometry where it coincides with the water surface. An internal lid is not required. Model Cg accurately. Check hydrostatic values first.