I am doing a ship moving through water using motion inertia but getting ripples and foam generated at the front edge of the simulator. Not sure what would cause this. It starts at the very beginning of the simulation, it is a ship moving through water in a straight line.
I have had the same issue for years. Something to do with particles getting stuck to the grid.
The work around has been in two parts: 1) open up more distance between the grid and front of the ship, 2) use a particle volume to prevent creation of splash and foam in areas close to the grid and wait until after those unwanted waves have settled down a bit.
Here is my simulation rig for you and others to play with.
Please let me know your comments and other ideas.
Ron Porter
Mustang, Oklahoma
ship sim.zip (1.33 MB)
I’ve tried increasing the steps per frame under Dynamics and decreasing resolution and that seems to help it a bit but still getting random foam being generated to the sides of the ship. Will be trying your particle volume to see if that solves it.
Thanks for the input
Hi Ron,
What are you doing to create the white caps in the background on the wave?
Use the slate material editor to examine the fluid simulator material.
You will find a PhoenixFDFoamTex used with a VRayDistanceTex.
I use this to keep the small foam simulations some distance from the ship hull proxy, since they do not look very real when viewed up close, but they do trigger nicely from the PhoenixFDOceanTex.
Hey Rporter could you save that out as a 2023 file instead of 2025? I would love to take a closer look at that whitecap texture you made. thanks!
Hey Brian,
See if this works for you.
Ron
__sim_2023_09_07.zip (1.33 MB)
Hey, appreciate that! I got it downloaded and looking at it currently
I have had the same issue ever since I made my first vessel simulation.
Nice renderings btw.
Many thanks! 
Ron