wired edge in flip simulation

[GrayHare]

Hi guys,

I am kind of newbie in flip simulation. Recently I am trying to use a animated ring to drive my Shockwave, however, I get a square-like edge all the time when I was running my simulation. The length of square is identical with the diameter of my ring. I guess the problem is from my animation because the edge(square) would change after I made alteration on my ring's diameter, but I am not sure where the problem exactly from.

 

 

Hope I could get some tips from you guys.

Thanks!

 

here is the sim result Link,

shockwave_R&D_test.hip

[GrayHare]

HI guys,
I did a couple of tests and finally found out which prameter  cause this problem. it is Surface Extrapolation under Flip slover-Collisions.
When I was changing its value from 0.5 to 1,  the wired edge came. you can check the test picture below.
 
 
However in my scene I want to press my whitewater lower. As I saw from reference a shockwave would not have so much splashes. is any way I could reduce my splash without changing this parmeter? maybe I could using surface normal as velocity field to control it?
 
thanks for answers:)

Edited October 14, 2014 by GrayHare

[JuriBryan]

geometry vop, check height of point, if its higher then what you want multiply y velocity down.

[GrayHare]

geometry vop, check height of point, if its higher then what you want multiply y velocity down.

Hi Juri,

Thanks for your reply. Do you mean using vop sop to deal with the cached particles?

[JuriBryan]

nope in the sim.
just use a geometry vop (its just like the attribute vop) and do it on the particle velocity stage.
you can do all operations you need in there