Water sim around lazy river

[cb LLC]

Hi does phoenix calculate empty cell during liquid simulations? We want to have lazy river using phoenix but a lot of empty grid cells will be in the middle of the lazy river. If phoenix does calculate every cell anyway to disable the middle part of the lazy river sim (dry land ) from calculations Thank you

[George Barzinski]

Hi,
there is an option using cascade simulators but in your case it's useless. Actually, 1 simulator would work best in your case and yes, Phoenix calculate all empty cells during simulation and we're working on optimizing this process.

[Raven]

If you create "stencil" geometry that fills the areas you don't want calculated, phoenix should ignore those areas as they are inside a solid object.
So in your case if the ground objects are all solid it should be fine.

[cb LLC]

Hi Thank you for your reply. So if I make a sold geometry in the middle and make it non solid and clear in phoenix options it will make grid cells inside of it not to calculate? Thank you


update. Ok I just read your comment again it is just plain solid mesh inside. George Barzinski in the post above said all areas are calculated regardless. I will try both ways

Thanks

[Svetlin.Nikolov]

Both answers are correct in their own domains actually. Fire/smoke simulations won't calculate for solid voxels, and there is the Confine Geometry option that makes it a bit easier to have the sim ignore large areas. This will save some computation time, but will still consume the same amount of ram. However, for fire/smoke you really need some air around the simulation in order to have it roll better and move more realistically. For liquids, most of the computations are focused where the particles are - making some areas solid will help a little, but not as drastically as for the fire/smoke sims, and if you have a lot of foam or splash particles, the effect will be negligible. Also, Confine Geometry is not implemented for Liquids yet.

Hope this helps