Kelvin Cai

kelvincai

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flip air incompressible instable April 27, 2018, 1:03 a.m.

running a sim sinking a ship in a tank.
the new air incompressible gives a lot great detail.
however, the sim explode randomly at certain frame. the ship is a very complex geo, but the animation of it sinking is fairly gentle though.

I also ran another with air turned off. It ran through fine.

what would cause the sim instable with air turned on?

Create points periodically / by impulses (Popnet or Scatter) April 5, 2018, 9:24 p.m.

vel vs collisionvel , and staticObject node's collision and source volume node's collision April 5, 2018, 4:23 p.m.

Static Object works for all solver. Source Volume works only for the solver the volume plug into.

Static Object, if deforming/translating, takes the trajectory into account, while Source Volume is not.

Static Object takes physical properties ie bounce, friction, etc, while Source Volume doesn’t.

vel is used for advection, pressure solve etc. collisionvel is only for collision detection.

Hope this helps.