Posted by: Jeff | 2010/02/26

FumeFX – Vorticity and Grid Spacing

This one deals with the relationship between the Vorticity and the Grid Spacing.

Quote from the FumeFX 1.2 help file:
Vorticity – This parameter is very useful for coarse grids, where simulations lack detail.  When you increase grid detail then the need for vorticity is lowered, since the simulation itself will result in more detail.  Higher vorticity will increase the number and strength of small vortices in the fluid.

Spacing – This parameter directly affects the detail level in your simulation.  Type in or use the spinner to set the spacing of the voxel-based grid.  The chosen value defines voxel size; smaller voxel size allows for more voxels in simulation, which produces greater detail.

@ Frame 40

@ Frame 80

Animation on Vimeo

Notes:

  • It can be clearly seen that with very coarse grids (large values), adding Vorticity can drastically change the fluid.
  • I also noticed that 0.5 Vorticity gives the highest simulation time, and 1.0 Vorticity the lowest. Here is a graph representing the time curve:
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Responses

  1. Interesting – I thought the more vorticity, the higher sim time 🙂 Nice findings!

  2. Nice work. This has been something I’ve been meaning to get to for about 2 years. Thanks for all the hard work setting this up – please do more!

    Mike

  3. Thanks Jeff, great findings caught your stuff from Vimeo.

  4. Nice…!
    thanks

  5. thx jeff for this information !

    if u hv a few time can u help me to fix some trouble

    here the link

    http://forums.cgsociety.org/showthread.php?f=6&t=904054

  6. Thanks for this.
    Cheers

  7. thanks for ur share^^

  8. HEY JEFF LIM! LOTS OF THAKS FOR THIS TIME SAVING TRICKS FOR VORTACITY AND SPACING IN FUME FX.I AM FROM INDIA,PLEASE GIVE SOME TUTORIALS FOR LARGE SCALE SMOKE AND FLAME TUTORIAL AS LIKE IN MOVIE -2012. THANKS GOOD WORK……..

  9. great help. Thank you Sir


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