Jump to content

# vortex filament example?

## Recommended Posts

hi,

I am tying to understand vortex filament simulation, found one example in houdini docs but still cannot get it? vortex filament : is it a line where its tangent is the center of rotation? can it be a line or must a closed curve?

Thanks

##### Share on other sites

Found this in the hou docs:

Filaments are closed polylines (polygonal curves) that represent vortex forces. The general filament setup works like this:

1. Create a a geometry network to create the filament geometry.

2. Import the filament geometry into the simulation network using the Source Filaments node.

3. The Filament Solver node advects the points of the filaments to make them drift through space.

4. While the Filament solver moves the filaments, the POP Advect by Filaments node applies vortex forces to surrounding particles, making them swirl around nearby filaments.

Edited by nuki
##### Share on other sites

thanks guys, since they are fluid simulator, can they be replaced pyro solver? i.e. what makes them special to have their own solver? I think they are scaled down version of the a fluid simulator that sims only circluar vortexes (so they can sim only this kind of motion but fast)? it's like a ripple solver vs flip solver?

thanks again

##### Share on other sites

4 hours ago, catchyid said:

thanks guys, since they are fluid simulator, can they be replaced pyro solver? i.e. what makes them special to have their own solver? I think they are scaled down version of the a fluid simulator that sims only circluar vortexes (so they can sim only this kind of motion but fast)? it's like a ripple solver vs flip solver?

thanks again

I believe this distinction is pretty well described here
https://www.sidefx.com/docs/houdini/dopparticles/filaments.html

also it's possibly based on a paper like this, where you can learn more about the target use cases and comparison to other approaches
http://page.math.tu-berlin.de/~pinkall/forDownload/filaments.pdf
https://dl.acm.org/doi/abs/10.1145/1778765.1778852

##### Share on other sites

Thanks everyone, I guess a lot of things to read about now

## Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×

• Leaderboard
• #### Support

×
• Create New...