nigelgardiner Posted March 26, 2016 Share Posted March 26, 2016 Hi There Hope someone can help me.. I'm using a pc running Windows 7pro with quad core xeon 3.6ghz 32 gig ram and nvidia gtx 960 4 gig card. The last few days I've been working on a sph fluid sim and Houdini is really grinding to a halt with only 100k particles. It seems to be only utilizing 10% of the available 32gigs of ram which seems strange to me? Also the resource monitor tells me there is 17gig of ram cached? Anybody able to shed any light on this? Or should I just install linux and be done with windows? thanks Nigel. Quote Link to comment Share on other sites More sharing options...
Guest tar Posted March 27, 2016 Share Posted March 27, 2016 10% of ram is very good, not sure if Linux would much of difference for such a small size. The reason it's very good is so Houdini can fit millions of particles into ram. Grinding to a halt means the processors are at 100%? SPH is not updated for a few version afaik, Flip is were everything is at and could have much better performance. Quote Link to comment Share on other sites More sharing options...
nigelgardiner Posted March 27, 2016 Author Share Posted March 27, 2016 yeah, my mistake, bad sim settings, of course 100k particles wouldn't use much ram. The processors were indeed at 100% I realise sph is an older model but from what i read it's still the better option for small scale splashes and the such like? Quote Link to comment Share on other sites More sharing options...
Guest tar Posted March 27, 2016 Share Posted March 27, 2016 H15 Flip has added, from the manual, "Swirly Kernel" (based on the APIC technique) for high vorticity simulations, so you should try that. No one is really testing SPH afaik. There probably are some nice research papers trying to get it's characteristics into FLIP though! Quote Link to comment Share on other sites More sharing options...
nigelgardiner Posted March 27, 2016 Author Share Posted March 27, 2016 yeah there's lots of papers, sadly it's been a long time since I've been able to read and follow math. i was using sph in blender with some success hence trying to use in houdini, perhaps I'll try to do the same with flip and see what the results look like. apart from anything flip has to be faster than sph. Quote Link to comment Share on other sites More sharing options...
Guest tar Posted March 27, 2016 Share Posted March 27, 2016 Here the link: https://disney-animation.s3.amazonaws.com/uploads/production/publication_asset/104/asset/apic-aselle-final.pdf Quote Link to comment Share on other sites More sharing options...
nigelgardiner Posted March 27, 2016 Author Share Posted March 27, 2016 Thanks Marty, much appreciated. This stuff is really fascinating, I've photographed liquids at 1/64000th of a second and pipe dream is to try and get close or reasonably visually similar with a sim. Quote Link to comment Share on other sites More sharing options...
Guest tar Posted March 27, 2016 Share Posted March 27, 2016 Nice! The Slow-Mo Guys do a ton of very-cool-stuff-to-sim Quote Link to comment Share on other sites More sharing options...
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