Abstract
An explicit algorithm of a particle method is proposed to analyze incompressible flow with free surface. The calculation is stable when the Courant numbers with respect to the sound speed and the flow velocity are less than 1.0 and 0.2, respectively. Thus, Mach number of 0.2 is the optimum to speed up the calculations. The leading edge position of collapse of a water column shows good agreement with that using the semi-implicit algorithm. The explicit algorithm is more effective as the number of particles n increases because the calculation time is O(n1.0) where n is the total number of the particles. The calculation is accelerated by multi-core CPU and GPU.
