PURPOSE:To enable highly-accurate simulation by storing a momentum, kinetic energy, and an angular momentum before and after two particles in the same cell collide against each other. CONSTITUTION:When the speeds of two particles in one cell are calculated in a particle system in an Euclid space divided into space cells, the momentum, kinetic energy, and angular momentum are stored. Namely, this two-particle collision calculation device is equipped with a computer 1, a uniform random number generating means 2, a 1st two-particle collision arithmetic means 3, and a 2nd two-particle collision arithmetic means 4. Consequently, the highly- accurate simulation can be performed.
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