SPH fluid simulation test: surface tension effects.

[ajcc103]

Hi Jahkr, what algorithm do you use for finding the free surface!? V. interested!!!

[ajcc103]

hi jahkr, what algorithm do you use for finding the free surface?? very interested!!

[Garfulon]

My goal for my life i sto make a game which is the most realistic...simulating every-day life...I just found my water simulator

:)

[trimtrim1980]

How you compute the surface tension and the direction of the surface tension force?

[NionsChannel]

Do I get this right? Only the particles on the outside are affected by forces from their neighboors and every other particle is only affected by pressure to avoid compressability?

[jahkr]

Not exactly, the particles inside the fluid are affected by differents forces, like pressure gradient and viscosity (calculated using the neighboors) , but only the particles in the surface are afected by the surface tension (calculated using free surface neighboors only)

[Weatherlawyer]

Got one of Newton's Cradle for comparison?

[kotsoft]

just curious. what does xsph add to sph, and where can i find more information about this?

[jahkr]

Hi kotsoft, before nothing I want to say that your codes and videos are impressive, congratulations for your work. The XSPH add a equation to basic SPH code to correct the speed of the particles, avoiding "evaporation" effects and improving the numerical stability. The correction is a "simple" average using the neighbors inner to the kernel for each particle. Search this article for more information Simulations of planet-disc interactions using Smoothed Particle Hydrodynamics