Open AccessAn Improved Dynamic Boundary Condition in SPH Method
Author(s) -
Xu LI,
Haiwen ZHANG,
Daoxian Yuan
Publication year - 2021
Publication title -
mechanika
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.205
H-Index - 23
eISSN - 2029-6983
pISSN - 1392-1207
DOI - 10.5755/j02.mech.28674
Subject(s) - dbc , boundary value problem , boundary (topology) , mechanics , asymmetry , no slip condition , domain (mathematical analysis) , physics , materials science , mathematical analysis , mathematics , mixed boundary condition , optics , quantum mechanics , phase noise
Dynamic boundary condition (DBC) has been widely used in SPH method. However, in certain situations, it was found that a few fluid particles could break through the boundary or were not reflected specularly. Of course, these phenomena are unphysical. To improve the performance of DBC, an improved dynamic boundary condition (IDBC) was presented in this paper. To prevent fluid particles from breaking through the boundary, the repulsive force of boundary particles was enhanced by expanding the equation of state into a higher order. To deal with the asymmetry of DBC, a rectangular support domain attached to boundary particles and a corresponding correction factor are proposed. The results of three test cases showed that the performance of IDBC was satisfied.