[WIP] 2D Fluid Sim in python

kayvolbeda

Hey everyone, here is a Fluid Sim I made in python. I am still researching how fluid sims work and how to implement them.

My goal with this project is to implement a way to bake a Fluid simulated flow map in UE4 for more realistic water movement in games.
this same system should also be used to make a 3D flowmap of a game environment for more realistic wind effects/behavior based on object occlusion (wind Tunneling effect).

Here is a video showing my WIP Fluid Sim:

https://youtu.be/0ZpTE-Jhx_A

ant1fact

subbed

kayvolbeda

ant1fact said:

subbed

Thanks!

RN

Looks very interesting. What literature did you find on the subject?

kayvolbeda

RN said:

Looks very interesting. What literature did you find on the subject?

I mainly followed this tutorial:
https://www.youtube.com/watch?v=alhpH6ECFvQ
For the navier stokes formula and explanation:
https://books.google.nl/books?hl=nl&lr=&id=BZnvCAAAQBAJ&oi=fnd&pg=PR5&dq=computational+fluid+dynamics&ots=HdzjIoVKw5&sig=oq1QN43Aac8rXvdlt9GAgf8kcXo#v=onepage&q&f=false
there are also a playlist explaining the Navier Stokes formula:
https://www.youtube.com/watch?v=JH3l-NliCkM&list=RDQM2paltGDPx8Y&start_radio=1

I am working on getting the navier stokes formula implemented in UE4 first, after which I want to try to make it possible to only simulate part of it and temporally construct the complete simulation (this would save a lot of performance).

Obscura

If you are going to put this into ue, make sure to check out the fluid sim plugin of Ryan Brucks. It hasnt been updated for a while and it has a lot of flaws but it should give you a good idea about how to do it in ue. You will also need a very strong videocard for to run the 3d one on high resolution. There is also a memory leak in it on the videocard side of things, it will make your card run out of memory after a few simulations because render targets dont get garbage collected and they get stuck in the memory. Fairly easy to fix for yourself though, and still cool.

kayvolbeda

Obscura said:

If you are going to put this into ue, make sure to check out the fluid sim plugin of Ryan Brucks. It hasnt been updated for a while and it has a lot of flaws but it should give you a good idea about how to do it in ue. You will also need a very strong videocard for to run the 3d one on high resolution. There is also a memory leak in it on the videocard side of things, it will make your card run out of memory after a few simulations because render targets dont get garbage collected and they get stuck in the memory. Fairly easy to fix for yourself though, and still cool.

Thank your Obscura!
I will definitely be checking that out and thanks for the headsup about the bugs.
I will see what I can do with it!

RN

@kayvolbeda thanks for the references, I'm going through them.

kayvolbeda

RN said:

@kayvolbeda thanks for the references, I'm going through them.

If you want more you could just google for "navier stokes Fluid Dynamics" and you will get a wealth of information.
There are possibly also a lot of siggraph and GDC talks about this formula and its implementation in specific scenario's.
I haven't been looking into those yet, but I am certain there will be enough to find.