Abstract
In this paper, we present an improvement of wall boundary calculation model for Moving Particle Semi-Implicit (MPS) method. Although particle methods are well suited for computation of a free surface flow, they still have issues. Wall boundaries are usually descritized into particles and used as boundary conditions. To compute a fixed boundary, the particles are calculated as fixed particles. These wall particles cause several issues. First, the wall particles, which are a descretized expression of boundary, cannot represent a smooth boundary. When a boundary with a slope is considered, they are not calculated as a smooth slope but a bummpy surface. Second, the wall particles increase the computational burden and so this leads to increase of computation time because the number of wall particles are large. The method proposed in this paper does not use wall particles but uses polygons. To compute each term, the contribution of fluid particles and the boundary is separated. This paper shows how the equations are derived from usual equations and then shows some computational results with the present method. Lastly, the result using the present method is compared with one using the wall particles quantitatively.
