4 research outputs found
Simple free-surface detection in two and three-dimensional SPH solver
A simple free-surface particle detection method for two and three-dimensional
SPH simulation has been implemented. The method uses sphere representation for
the SPH particle. The fluid domain is covered by overlapping spheres. A sphere
whose surface is not fully covered considered as boundary. To test particle
boundary status, we used a sum of normalized relative position vectors from
neighbouring particles to the test particle. By checking the existence of un-
covered sphere surface by this vector sum, boundary status of the test particle
can be determined. This boundary detection method can be easily embedded in the
SPH solver algorithm.Comment: 10 pages, 11 figures, Selected Paper from the International Symposium
on Computational Science 201
Three-Dimensional Smoothed Particle Hydrodynamics Simulation for Liquid Droplet with Surface Tension
We provide a basic method of Smoothed Particle Hydrodynamics (SPH) to
simulate liquid droplet with surface tension in three dimensions. Liquid
droplet is a simple case for surface tension modeling. Surface tension works
only on fluid surface. In SPH method, we simply apply the surface tension on
the boundary particles of liquid. The particle on the 3D boundary was detected
dynamically using Free-Surface Detection algorithm. The normal vector and
curvature of the boundary surface were calculated simultaneously with 3D
boundary surface reconstruction using Moving Least-Squares (MLS) method. Before
the reconstruction, the coordinate system was transformed into a local
coordinate system. Afterwards, the surface tension force which depends on
curvature of the surface, was calculated and applied on the boundary particles
of the droplet. We present the simulation result of droplet motion with gravity
force. By using the basic method of SPH for fluid modeling, and a combination
of 3D Free-Surface Detection algorithm with MLS method, we can simulate droplet
phenomena with expected result.Comment: 9 pages, 4 figure, Selected Paper from the International Symposium on
Computational Science 201
Simple free-surface detection in two and three-dimensional SPH solver
Abstract. A simple free-surface particle detection method for two and three-dimensional SPH simulation has been implemented. The method uses sphere representation for the SPH particle. The fluid domain is covered by overlapping spheres. A sphere whose surface is not fully covered considered as boundary. To test particle’s boundary status, we used a sum of normalized relative position vectors from neighbouring particles to the test particle. By checking the existence of un-covered sphere surface by this vector sum, boundary status of the test particle can be determined. This boundary detection method can be easily embedded in the SPH solver algorithm