steam of coffee

[ghiom3d]

hello, i'm trying with no success to create coffee steam .
something fine and dynamic like in this picture



i don't find how to proceed !
I'm using the top of a cylinder as source of the particle, at the coffe suface level.
Because i want the steam appear higher than the surface level and not always at the same place and high , i'm using a noise modifier and a slice to animate the particles source.
in blue here :

I'm using this parameters :
Vorticity xV 0,1
cooling 0,15
smoke dissipation 0.97
smoke buoyancy 0.08

conservation smooth quality 8
uniform density

Advection method is classic
Steps per frame 8


When i'm using PhoenixFD to render the smoke it's to soft , not funny at all


So, i'm thniking about using Krakatoa to render
When i'm using Phoenix FD to generate particles and rendering them with Krakatoa i have something interesting, but to sharp and bugged


Now, i need to know which parameters can help me to heve something better.
Also, i would like the steam appear when temperature is less high , i'm playing with the colors and transparency smoke density and colors gradiant with no success .


Can you help me ?

thanks for your kindness

[Ivaylo Katev]

i would recommend to use particles for rendering, krakatoa or our foam shader in point mode.
for smooh rendering you will need about 50M particles. perhaps you have seen our sample scene demonstrating the particle technique, it uses 60M particles.
you can try to simulate with multipass advection if you need more curly movement.
about the particle birth, unfortunately our particles do not have the same control as in the operator that we did for pf, that is shame. with pf you have no chance to produce the needed particle count, it is too slow. you have to make it like now, with some invisible geometry.

[ghiom3d]

Thanks, you , i will try this.

I have another idea.
it's to create velocity with phoenix FD and then, create some particles with PF , then partitionning with Krakatoa and making some shader with Magma and compositing ..
Like i did for this one : https://vimeo.com/39425682

But it's a lot of work .. i would like to understand better your idea before

[Ivaylo Katev]

btw, the reference above. i hope it's not a cg? the foam looks too real, the steam however may be cg.

[ghiom3d]

Is particle flow " PhoenixFD Birth" and "PhoenixFD force" are broken ? it's seems to do nothing

[Ivaylo Katev]

the last time i tested them they were ok, but will test again

[Ivaylo Katev]

they are working, but the temperature diagram refused to scale... that made the task to adjust it very hard. right click over the point and edit is the best way in this case. it may be just for this scene, because all other diagrams were responding properly

[ghiom3d]

Hello,

thanks for your support !! this is really fast and usefull . i will try again .

[ghiom3d]

I can't make Phoenix FD force driving the particles from particle flow


What i'm doing wrong ?

[Ivaylo Katev]

you have to export the velocity channel , see the output

[ghiom3d]

that's already what i do


i've checked this Velocity everywhere i saw it

[Svetlin.Nikolov]

(Edited out)

[ghiom3d]

that's strange .. when i build this seeting in a fresh new scene, it's working .. but not in my scene.

[ghiom3d]

Particles flow "PhoenixFD Test" make 3DSMAX crashing a lot ! especialy with true if below is checked for temp .

[Svetlin.Nikolov]

Can you strip your scene of any secret stuff and send it so we can have a look? Also, which version of Phoenix are you running?