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Questions tagged [fluid-sim]

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3
votes
1answer
137 views

Rendering Fluid Simulations?

I've read about Lagrangian and Eulerian fluid simulations and here's what I take from their methods: Lagrangian - Simulating fluid particles by calculating displacement for each particle Eulerian - ...
4
votes
1answer
75 views

Hodge Decomposition in fluid simulations

I have just started implementing a fluid simulator based on the navier stokes equation. I am following Jos Stam's paper to do so. In this paper, it says that the velocity field must be mass conserving....
1
vote
0answers
37 views

How to run semi lagrangian advection backward in time

I want to advect the quantity back in time in semi lagrangian scheme but I don't recognise how to do that! We just trace back and see the value to assign it to this cell in case of forward advection ...
6
votes
2answers
100 views

Rigorous and simple explanation for satisfying boundary conditions in Stam and Bridson papers

I read Stable Fluids and the code by Jos Stam and FLUID SIMULATION SIGGRAPH 2007 Course Notes by Robert Bridson. The boundary conditions in the two papers are different in my sight. I don't understand ...
4
votes
0answers
93 views

How are fluid simulations handled in Computer Graphics?

How are fluid simulations handled in Computer Graphics? For a novice, there are hardly any novice friendly tutorials explaining how particles or fluids can be simulated. Things like smoke, crown ...
3
votes
1answer
321 views

Jos Stam's “Stable Fluids” boundary conditions

In the paper Stable Fluids by Jos Stam, I am confused about the boundaries in the set_bnd function in the code. I don't know what kind of boundaries is this. Is it Neumann boundary condition or ...
1
vote
1answer
232 views

Particle & Fluid Simulation: Where to learn? [closed]

Where can I learn about particle and fluid simulation? Is there a good book available? I want to couple volume rendering with fluid/particle simulation to be able to finally render smoke and ocean ...
2
votes
1answer
1k views

Fluid sim: CPU vs. GPU

I have very recently started looking into real-time fluid simulation. Idea is to make a game that would use 3D fluid simulation as a core gameplay mechanic. Looking around the web, I found this ...
8
votes
0answers
125 views

Conserving Mass in Liquid Simulation

I am trying to implement a 2D version of Foster and Fedkiw's paper, "Practical Animation of Liquids" here: http://physbam.stanford.edu/~fedkiw/papers/stanford2001-02.pdf Mostly everything works, ...
9
votes
1answer
176 views

How could I check the correctness of my result of fluid simulation?

I wrote a particle based fluid simulating program. It's hard to tell if I get the right result. The visualized result seems reasonable, but some part of it looks weird. I don't know wether it's a ...
7
votes
0answers
280 views

Code runs differently on different hardware

I wrote a 2D fluid-solver in OpenGL (code here) some time back. While it runs flawlessly on my onboard Intel GPU, the simulation very quickly "blows-up" when same code is run using nvidia card : ...