An Improved Dynamic Boundary Condition in SPH Method

Authors

  • Xu LI Tianjin University
  • Haiwen ZHANG China Institute of Water Resources and Hydropower Research
  • Dekui YUAN Tianjin University

DOI:

https://doi.org/10.5755/j02.mech.28674

Keywords:

dynamic boundary condition, DBC, SPH

Abstract

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.

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Published

2021-12-10

Issue

Vol. 27 No. 6 (2021)

Section

MECHANICS OF FLUIDS AND GASES

License

The copyright for the articles in this journal is retained by the author(s) with the first publication right granted to the journal. The journal is licensed under the Creative Commons Attribution License 4.0 (CC BY 4.0).