REALFLOW 2013 - SPH vs GFD

[Duca]

REALFLOW 2013 - SPH vs GFD

Hallo guys,
witch is the difference between SPH (Smoothed-particle hydrodynamics) and GFD (Grid Fluid Domain) and when to use the former rather than the latter, and vice versa?

MAny thanks!

[tsn]

Put briefly, the difference is scale: SPH is mainly used for simulations with a high level of detail, but also suitable for mid-scale projects, e.g. flooding a corridor etc. All kinds of splashes, paint simulations, etc. are also typical for SPH. With Hybrido you normally simulate large amounts of water. It's used for ocean surfaces, huge waves and massive floods. The level of detail is not as as high as with SPH, but already very good. Hybrido is also faster, because it requires less time steps to get satisfying results. When you need detail in Hybrido simulations you add secondary elements like splashes or foam. These emitters add the fine structures you cannot simulate in Hybrido.

With RF2014 there'll be a sophisticated viscosity solver for Hybrido letting you simulate all kinds of gooey and sticky things like honey, mud, or tar.

[Duca]

Great, many thanks!