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vortex filament example?


catchyid

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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.

source

 

Edited by nuki
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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 :)

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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

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