Coding Adventure: Simulating Fluids

wow

Boundary problem not so problem actually. There is a bunch of "boundary effects" in real physics.

The fluid simulation worked so beautifully that I almost cried while watching the video. This is a really cool video. thank you

This was awesome! It is so inspiring and I want to build something like this myself now. I am really excited to see what you do next with this project! I can't wait to see your updates!

Yeej, a new video! This, as all other videos, makes me smile. 🙂

God that is gorgeous

The next step is to add the temperature!

brilliant!! looking forward to part 2

I want this as a wallpaper

I don't see myself ever using Unreal in the near future but somehow I watched the whole video, your voice is mesmerising

Always very inspiring! And the 3D simulation was sooooo fun to watch I would love a whole game lol

The most simple and efficient way to simulate damping , with no instability and pretty nice visual results is... to scale down speeds at each step (by a % exponentially dependent of the step time). The advantage is that this method always decreases energy. Methods based on damping forces introduce errors in damped force that add unwanted energy to the system, reducing the stability.

Very Cool!

The problem with particles is that an incompressible fluid will have an infinite speed of sound, but with a simulation you are limited by the update time (for a field you'd be implementing the Boussinesq equations, which just remove the sound waves a priori). In principle you want an infinite pressure multiplier, your speed of sound will be proportional to that.
There is of course the point that a smooth density doesn't really have a meaning for a Lagrangian simulation like you have here. Removing the inertia of the particles is the right call. I wouldn't be surprised if this turns out to be some approximation to a Boussinesq fluid.

You have genuinely changed my life, your videos have been a landmark for my development as a programmer and also reaffirming my interest in game development. I started game development at first just through loving games, but you have a way of presenting game development that made me love it as much as a love games themselves. Keep doing it❤️

Sebastian - Is Nebula a place for your videos? Would love to see them over there. You may have an expanded audience.

Damn a human made this video?

I did find it a bit strange how the water would explode at the start but maybe that's because it's not acting a try incompressible fluid.
I think two (possibly related) optimizations that might help are focusing on areas that have more particles than ones with fewer. I remember watching a video on here about that and I think they visualized it with different sizes boxes or maybe that was more for the second idea. Focusing on areas with high velocities. I remember watching a "Two Minutes Papers" video on it. The calm water areas were visualised as very large blue spheres. While the high energy areas got more attention ie, small red spheres.

Shut up and take my money :D Please bring it out as is. Already Perfect :)

Watching second time letsgo

This is a well earned Abonnement.
Really nice work, a lot of affort and awesome visualization.

i was totally waiting fo you to post agin letss gooooo

Looks awesome :)

Amazing video, great work!!!

Oh my god

Incredible.

Hmmm... would it be better to use a standard harsh-table instead of inserting into an array that is then sorted?

One week later, amazing video ! Very beautiful simulations

awesome !!

Very nice and educational!

i am trying to do what he is doing but drawcircle doesnt exist

HELPPP

my brain do be braining

which softwares did you use

This was my bsc degree subject. Thank god i didnt do any graphical, only calculations, in fortran, that took me almost 1 week of running the code for 2k steps of simulation.

Keep on the good work ❤❤❤. Maybe next time you could do a surface inside the simulation, like a boat or any aerodynamic surface

Brings function compute time down from 20s to 5s to 18ms...

... Still not fantastic... 😮

Sebastian Lague is the 3blue1brown of coding

nice 👍

I saw ur geographical game its great and i wonder if u could do something like a flight simulator out of it it would be very nice to visit the whole world

I would be really interested to see the double slit experiment in this simulation

Love you stuff! Would love to see the simulation handle multiple liquids with different densities / color. I think watching as an "oil" liquid rises above a "water" liquid would be pretty neat. Especially since oil and water are immiscible, so you'd have to somehow account for that. But then also watching as two colored waters try and mix would be interesting as well. While I'm at it, I'll say getting a siphon to appropriately work would be neat as well. Regardless, I'm super excited to see where this goes. Have always wanted to implement my own fluid sim, so until then I shall live vicariously through you.

Always such high quality videos from you. I am looking forward to part 2.