Hello Caleb,
If you remove the rigid plate, do you see the expected behavior for the free surface problem and the waves?
Do you have surface tension defined?
Could you simplify this model and run in 2D? Here is an example:
https://www.dynaexamples.com/icfd/basics-examples/wave_gen
With a 2D model, you could run faster and troubleshoot quicker.
Reno.
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