Use particles velocity for pyro

[sinarhp]

Hi everyone

 

I am trying to source POPs velocity into DOPs to drive a pyro sim,

 

I followed Peter Quint`s tutorial on Particle smoke: https://vimeo.com/11194348, and tried to source the particles velocity using "vector field DOP" and "gas particle to

 

field DOP", But no matter what I do I can not get it work,

 

I also tried using a "POP solver " and attaching it into the "velocity update" input of the pyro solver, it works for flip fluid sims but not for pyro sims,

 

I am relatively new to Houdini and I can not figure out  what I am doing wrong or even if this is the right approach to source POPs velocity for using in pyro sims.

 

I have attached my hip file

 

I would really appreciate any help.

 

Regards

 

Sina

POPs_velocity_to_DOPs.hipnc

[teratera]

Just convert your particles to a velocity volume and use Source Volume DOP. Couldn't be easier

POPs_velocity_to_DOPs_fix.hipnc

[anim]

or just use Field Force DOP and as a second input plug SOP Geometry DOP (Set Always) reading your particles

set Field Force DOP/Force Attribute to v

and play with the settings

Edited January 25, 2014 by anim

[sinarhp]

Thanks alot teratera and anim,

 

In the meanwhile I managed to get the same result by using a second "fluid source SOP" to source just the velocity of the particles and merge it with the density "source volume" in DOP,

But using a "VDB from particles" seems like a more straight forward way of doing this,

 

Also tried the "Field Force DOP" as well, it gives the same results but just with a tiny bit more tweaking!

 

Thanks again guys really appreciate it

 

Sina

[houdiniMAN]

wait i'm lose how did u guys get it to work, I've been trying to do this for sometime now i'm don't really know anything about VBD can you example a little more what you did, and can this work on animated geo as well

 

thank you

Edited January 28, 2014 by houdiniMAN