Post
by LuisMiguel » Thu Jun 06, 2013 11:26 am
Hello Felix,
The difference between cell size and particle sampling is simple. Each cell has 8 particles inside. If you set a low value for the cell size, you are increasing the number of cells and there will be more particles because there are more cells for the hybrido domain. But each cell will have 8 particles inside independently the number of cells you set for the simulation. On the other hand, core sampling will increase the number of particles for each cell. By default, each cell has 8 particles cause the core particles sampling parameter is 2 at cube. So, if you set 4 in that parameter, you are indicating that there will have 64 particles inside for each cell.
So, setting low values for cell size will adjust the fluid in a better way besides adding more particles to the scene. It means, for instance, if you have 3 cells for your hybrido domain you'll have 24 particles with a cell size of 0.3. Now, if you set the cell size to 0.15, there will be 48 particles in the scene because you are doubling the number of cells. In the other case, if you have 3 cells for your hybrido domain, you'll have 24 particles, but if you increase the core particle sampling to 4, there will be 3 cell in the scene, but now, with 64 particles each cell, it means, 256 particles in the scene. The advantage increasing the core particle sampling value is you'll have more particles and the memory won't be consumed in excess, but it is not useful if you need the fluid adjusted perfectly with the geometry. In order to do that, you'll need to set a low value for the cell size parameter.
I hope it helps.
luisM.