NVIDIA’s Tech: Impossible Water Physics!

Key Takeaways

this amazing paper is a collaboration between Nvidia and IST Austria on how to simulate water but not just any piece of water like many many previous techniques no no these are large scale simulations with boats dispersive Reflections waves slushing onto the beach and oh my a tiny bit of flooding as well and you are going to hear about other papers from other groups like this this and this so back to floods and wakes is simulating that even possible one previous technique is great at simulating wake patterns these look great however look on the shore the water behaves incorrectly it essentially bounces back as if it hit a wall this part can be simulated better with a shallow water simulation but oh no oh in that case the both wges are completely off h no one technique can perform both correctly so what do you do then well if no one technique works perfectly you run both two theories the really cool thing is that in this paper both are computed separately and then are combined into a beautiful unified simulation that can do everything correctly that is absolutely incredible and I would imagine probably takes forever more on that in a moment but it gets better in three different ways one is that even shallow water simulations are not perfect look water can just disappear from the simulation over time due to numerical inaccuracies so does the new technique solve that oh my look at that no more disappearing water this is absolutely incredible because this new technique is not just fusing two methods together but it is also making them better loving it now it is better because too the amount of detail in the simulations has also increased wow there is a huge difference between the two so more correctness and more detail I bet this takes forever to compute probably takes a few minutes for each frame in this video right well hold on to your papers fellow Scholars because three it all runs in real time goodness and the verticity generated around this obstacle is just mesmerizing I mean just look at that and if you wonder how accurate it is well get this the paper states that it is a numeric Al perfect Recreation of theoretical wave patterns that is a strong claim that you don't see very often in papers like this and yes this is eye wateringly good quality but there are also really exciting other works in this area well not this one you see simulating fluid splashes where particles split and merge are really tough when we slow it down oh yes you can see better there is some goo here that refuses to split or oh my even worse it stes to surfaces it should not stick to and this new technique can let's see now we're talking fellow Scholars we get a much bigger Splash at the back of the simulation domain they are willing to separate more and are much less sticky and we don't even need a huge Splash for previous techniques to break down if we decrease the resolution of the simulation some droplets are willing to take the leap While others not so much and the new technique has perfectly willing particles so good but this previous ghost fluid method is perfectly fine when it comes to a dam brake until you slow it down and look carefully do you see it oh yes some of the slits are completely clogged this is not working well in the presence of thin structures yes once again thin structures the 2minute papers special so how does the new technique perform look the slits are now working correctly thank the papers it can also do one of my favorite kinds of simulations yummy surface tension for a cube in zero gravity which as it should slowly becomes a sphere they only so did it with an armadillo which is truly a sight to behold although the very end of the simulation seems to have been cut off that's okay I still love it and having a good surface tangent simulator doesn't only help with crazy experiments like this here this is just a normal Splash with no good surface tension added H we see that something is wrong here but it is hard to say what exactly and with proper surface tension oh my one more cohesive Crown surface and a few droplets that say goodbye everyone so good another fantastic paper and finally this other work shows how to simulate highly Dynamic scenes where a liquid bunny is slushing in a moving sphere and in the meantime it makes sure to have just the right amount of Splash that PR previous methods failed to capture correctly so I hope you enjoyed this if you did make sure to subscribe and hit the Bell icon and let me know in the comments below what kind of simulation you would make with these methods I'd love to hear it if you're looking for an Nvidia GPU cloud service for largescale AI projects check out oneclick clusters by Lambda featuring up to 512 Nvidia H 100 gpus with infin band networking and hold on to your papers because with one click clusters you can access all these gpus On Demand with reservations starting at just 2 weeks try it out at lamb.com SLP paper or click the link in the description