ftaswin Posted August 16, 2017 Share Posted August 16, 2017 Hi Is there any way to have a flip solver that simulates multiple type of liquids together? Like layering system that has weight of interactions between different layers. I am thinking of having something like jelly, oil and blood mix in the same blood. They are all quite viscous but not meant to stick with each other. I want the jelly to slide (slip) off the oil and blood and vice versa. Is it possible? I am aware I cannot have 2 flip objects running and interact with each other. Or can they? I am thinking about building a custom dynamic collider that only affect certain particle group (layer). That quickly getting confusing as I am planning to have more than 2 type of layers. At the moment my viscosity always trying to pull the other layer with them no matter how I set @ballistic (activation), or @stopped (which cause particle to fall through), surface tension or slip field. I am running out of ideas now. Thank you all Quote Link to comment Share on other sites More sharing options...
nigelgardiner Posted August 16, 2017 Share Posted August 16, 2017 you could using density to separate the different components, that'd make flip layer them by density and apply different forces to them to create the mixing. might be too crude for the behaviour you want to create tho cheers Nigel. Quote Link to comment Share on other sites More sharing options...
jamesr Posted August 16, 2017 Share Posted August 16, 2017 (edited) If you're trying to mix something around like blood/water, coffee/cream, oil, etc, you can try using the density+viscosity parameters in the FLIP solver and see if you get desired results. You could do a "points from volume" and source that in as a particle field in the flipfluid object, and create an attribute on the points in SOPs called f@density Then turn on "density by attribute" in the FLIP solver. EDIT: After re-reading your post, I don't think I really answered your question as I don't think density by itself will cause the two viscous fluids to rub against each other... Edited August 16, 2017 by jamesr Quote Link to comment Share on other sites More sharing options...
ftaswin Posted August 16, 2017 Author Share Posted August 16, 2017 Yeah, Viscosity is the big bottle neck on what I try to achieve. It sticks no matter what. I thought some sort of layering would be helpful Quote Link to comment Share on other sites More sharing options...
ftaswin Posted August 22, 2017 Author Share Posted August 22, 2017 I can create custom self collision using gas particle to sdf and gas calculate to collision field, but this setup stops the collision from static object to behave properly. Has anyone build a custom collision in dop before? Quote Link to comment Share on other sites More sharing options...
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