Particle simulation apparatus and computer resource allocating method

A computer resource allocating method in a particle simulation, the computer resource allocating method comprising:

• assigning, by a parallel computer that includes a plurality of nodes, a partial region that is a division of a region in which a plurality of types of particles are distributed to each of the nodes, and executing a plurality of programs for a particle simulation by each of the nodes;
• determining, by a processor, a calculation cost for each of a plurality of processing-target particles of each of the plurality of types according to a type of a processing-target particle of each of the plurality of programs and an execution time of each of the plurality of programs;
• and
• changing, by the processor, a position of a region boundary of the partial region according to the calculation cost and a number of the plurality of processing-target particles of each of the plurality of types to improve parallelization efficiency by efficiently allocating computer operation.