Simulating Water and Debris Flows

2:53

Simulating Water and Debris Flows

Two Minute Papers 21.08.2019 152 090 просмотров 6 230 лайков

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❤️ You can support the show through Patreon: https://www.patreon.com/TwoMinutePapers 📝 The paper "Animating Fluid Sediment Mixture in Particle-Laden Flows" is available here: http://pages.cs.wisc.edu/~sifakis/papers/MPM-particle-laden-flow.pdf https://dl.acm.org/citation.cfm?id=3201309 🙏 We would like to thank our generous Patreon supporters who make Two Minute Papers possible: 313V, Alex Haro, Andrew Melnychuk, Angelos Evripiotis, Anthony Vdovitchenko, Brian Gilman, Bruno Brito, Bryan Learn, Christian Ahlin, Christoph Jadanowski, Claudio Fernandes, Daniel Hasegan, Dennis Abts, Eric Haddad, Eric Martel, Evan Breznyik, Geronimo Moralez, James Watt, Javier Bustamante, John De Witt, Kaiesh Vohra, Kasia Hayden, Kjartan Olason, Levente Szabo, Lorin Atzberger, Lukas Biewald, Marcin Dukaczewski, Marten Rauschenberg, Maurits van Mastrigt, Michael Albrecht, Michael Jensen, Nader Shakerin, Owen Campbell-Moore, Owen Skarpness, Raul Araújo da Silva, Rob Rowe, Robin Graham, Ryan Monsurate, Shawn Azman, Steef, Steve Messina, Sunil Kim, Taras Bobrovytsky, Thomas Krcmar, Torsten Reil, Zach Boldyga. https://www.patreon.com/TwoMinutePapers Splash screen/thumbnail design: Felícia Fehér - http://felicia.hu Károly Zsolnai-Fehér's links: Instagram: https://www.instagram.com/twominutepapers/ Twitter: https://twitter.com/karoly_zsolnai Web: https://cg.tuwien.ac.at/~zsolnai/

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Introduction

dear fellow scholars this is two minute papers with károly on IFA here we recently talked about an amazing paper that uses mixture theory to simulate the interaction of liquids and fabrics and this new work is about simulating fluid flows where we have some debris or other foreign particles in our liquids this is really challenging for example one of the key challenges is incorporating two-way coupling into this process this

Sand Effect

means that the sand is allowed to have an effect on the fluid but at the same time as the fluid sloshes around it also moves the sand particles within now

Real Footage

before you start wondering whether this is real footage or not the fact that this is a simulation should become clear now because what you see here in the background is where the movement of the two domains are shown in isolation just

Ice Cream

look at how much interaction there is between the two unbelievable beautiful simulation ice cream for your

Density Correction

eyes this new method also contains a novel density correction step and if you watch closely here you'll notice why got it let's watch it again if we try to run this elasto-plastic simulation for these two previous methods they introduce here again in density or in other words we end up with more stuff than we started with

Simulation Grid

with these two rows show the number of particles in the simulation in the worst case scenario and as you see some of these incorporate millions of particles for the fluid and many hundreds of thousands for the sediment since this work uses the material point method which is a hybrid simulation technique that uses both particles and grids the Delta X row denotes the resolution of the simulation grid now since these grids are often used for 3d simulations we need to raise the 256 and the 512 to the third power and with that we get a

Conclusion

simulation grid with up to hundreds of millions of points and we haven't even talked about the particle representation yet in the face of all of these challenges the simulator is able to compute one frame in a matter of minutes and not hours or days which is an incredible feat with this I think it is easy to see that computer graphics research is improving at a staggering pace what a time to be alive if you

Outro

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