Slow down particles speed in small cross section

[houdini1987]

Hello everyone,

I am trying to create an effect for a project where particle is moving in a tube with constant speed. What I need is to particle gets slow down at crushed cross section (shown by red arrow in image ) and then move ahead at normal speed.

Any pointers to achieve this will be helpful.

I have attached a reference image to get better understanding.

Thanks in advance. 

[fuat]

if you´re using POPs (what i assume), check out "popcurveforce". does exactly what you want.

Edited May 21, 2015 by fuat

[fuat]

another way would be slow down the particles based on their global position. you can do that with VOPs.

and a third way (even if there are much more ways to do that i believe) would be to  place a box-volume at slow-down-area and adjust the velocity of the particles based on the SDF-values of your volume.

hope this helps

fuat