Fenolis Posted May 12, 2015 Share Posted May 12, 2015 (edited) Hi guys, I am trying to make a bowl filled with water. However, the fluids keep on leaking out from the collision geometry even though the collision geometry looks fine. Could anyone take a look at my hip and see what is wrong? untitled.hip Edited May 12, 2015 by Fenolis Quote Link to comment Share on other sites More sharing options...
pbarua Posted May 12, 2015 Share Posted May 12, 2015 "angel_first_bowl_pour_origin.bgeo" missing. Quote Link to comment Share on other sites More sharing options...
Fenolis Posted May 13, 2015 Author Share Posted May 13, 2015 Can't upload .bgeo files: angel_first_bowl_pour_origin.zip Quote Link to comment Share on other sites More sharing options...
danw Posted May 14, 2015 Share Posted May 14, 2015 Haven't looked at the file, but in general with FLIP you have to consider that there's no such thing as "collision geometry". All a FLIP sim sees is a collision volume - whether you convert a poly object to an SDF in SOPs, or connect it as a collision relationship in DOPs and let DOPs auto-convert it for you, you end up with a signed density field. Basically, FLIP fluids will leak through anything thinner than around ~2-3 voxels thick, so unless you crank the resolution of your sim up massively, things like bowls, glasses, etc, will almost always cause leaking. The simplest way is to create a proxy collision object, which maintains the same internal surface, where you intend the fluid to interract, but "fattens" the object outward on the side you're not interested in. That way, you'll always ensure there's a resolvable volume behind the surface. This is even more important if you're animating the collision object, as an animated thin object is going to skip straight through the fluid unless you use massive timestepping as well as massive resolution. 3 Quote Link to comment Share on other sites More sharing options...
henrik.g Posted May 15, 2015 Share Posted May 15, 2015 Great Info there dan.! Thanks! Quote Link to comment Share on other sites More sharing options...
Fenolis Posted May 16, 2015 Author Share Posted May 16, 2015 That...blew my mind. Excellent explanation of the FLIP sim and a cool solution to boot. Thank you very much! Quote Link to comment Share on other sites More sharing options...
danw Posted May 17, 2015 Share Posted May 17, 2015 Hehe, glad I could help :-) Best of luck with it! Quote Link to comment Share on other sites More sharing options...
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