Collision of planetesimals (SPH simulation)

Collision simulation of two equal-sized planetesimals. Both bodies are differentiated, with a core with density 7860 kg/m^3 and a mantle with density 2700 kg/m^3. The simulation contains about 2 million particles, it took four days to compute it on my home PC. The video shows about 27 hours of simulation time. Computed with OpenSPH Join the Discord server: Support my work on