Dust advection

[edgem]

Hi everyone,

 

I am in a process of simulating advection of particles by a fluid simulation to create dust.

 

However in my sim, I am getting a lot of filament and streaks like Krakatoa style. I have been wanting to know if there is any way of getting rid of these streaks ? I guess that is coming from the velocity of the fluid

 

I have been trying to increase/decrease turbulence and disturbance to no avail.... Increasing turbulence creates more of a fluffy look but there is more noise inside.... Decreasing turbulence do make less streaks but are more aparent.

 

 

Thanks for any advice

Edited November 17, 2014 by edgem

[kleer001]

If you could post images and/or hip files we might be able to assist you better.

[edgem]

Hello kleer,

 

Here is a hip file and image

 

 

 

Thanks 

dust_storm_v01.hip

[jonp]

You can "diffuse" your particles by using a POP force.  So just use the noise parameters on the pop force node or create your own direction with VEXpressions.  Like adding a random direction to the particle.

float seed = @id + 1.23456;
vector rand_dir = rand(seed) * 2 - 1;
float speed = 1;
force += normalize(rand_dir) * speed;

Edited December 9, 2014 by jonp