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Hey Houdini Gurus! I am trying to do some RnD on creating a massive whirlpool using flip fluids. Although I am aware of how to create custom forces in Houdini, I am pretty much clueless on how to create a tangential vortex force in order to achieve this effect. In my head, here is how I think I would do it. Correct me if I am wrong. - Create a geometry where whirlpool would swirl on including the middle whole. - Create custom tangential vectors on that geometry with some noise patterns on it to break the uniformity. - Plug the field into the flip. Can anyone help me with this? What would be the maths behind it? I searched here and people have done it using Houdini Ocean Toolkit before but that's not the approach I am looking for. I want to achieve it in flip. Something like this Thanks a lot for the help. -b