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acti

pyro colliison doesnt work

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hi,

i work on pyro collide with a moving object now,and i found some posts about the pyro collision on odforce,but no matter i use static object with PCG or collision volume with multigrid,pyro just like be "eated" by the moving object ,as a sink field.i try to increase the supstep but it doesnt have a right look .

sorry for my bad engligh, here is a file what i want to say,anyone have some tips?

pyro_collision.hip

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Try disabling "correct collisions" in the advanced settings on the solver. Might help the sink like problem.

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Hi jayden,thanks for the reply,but when i disable correct collision nothing has changed.i dont know why the smoke doesnt collide with moving object,it looks werid.

sorry, i found another "correct collision" in the relationship tab,and when unable it the result had a better motion,but the smoke did not keep up with the collision object.I dont

know how to fix that.

Edited by acti

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Usually for a collision like this, I get better results by creating a regular velocity field from the deforming geo, instead of the collision and collisionvel fields. Although, you could probably use all 3 together...

So in this file I took your box collision geo, scattered points (to get more samples), then calculated the velocity, then just created a default fluid source node. The only field I created in it is vel.

In the dopnet, create a source volume node (which goes into the velocity input), and call in your newly made vel field. Under volume operation tab, put source volume and temperature to "none", and velocity to "add." Then just play with the scale velocity, until you get something useable

ac_pyro_collision.hipnc

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Hi Arrev,thanks for your tips.i have been looked your file and the smoke moving nice at the begin ,but when the collision object stop or something else force in there,that made hard to control it.

I think the smoke will inherit velocity from the collision object(add its own velocity) and spread around.(maybe i was wrong)

I will keep trying on it and any advice is useful for me,thanks. :)

Edited by acti

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