Direct imposition of the wall boundary condition for simulating free surface flows in SPH

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In this study, a new method for treating the wall boundary in smoothed particle hydrodynamics (SPH) is proposed to simulate free surface flows effectively. Unlike conventional methods of wall boundary treatment through boundary particles, in the proposed method, the wall boundary condition is directly imposed by adding boundary truncation terms to the mass and momentum conservation equations. Thus, boundary particles are not used in boundary modeling. Doing so, the wall boundary condition is accurately imposed, boundary modeling is simplified, and computation is made efficient without losing stability in SPH. Performance of the proposed method is demonstrated through several numerical examples: dam break, dam break with a wedge, sloshing, inclined bed, cross-lever rotation, pulsating tank and sloshing with a flexible baffle. These results are compared with available experimental results, analytical solutions, and results obtained using the boundary particle method.
Publisher
TECHNO-PRESS
Issue Date
2021-05
Language
English
Article Type
Article
Citation

STRUCTURAL ENGINEERING AND MECHANICS, v.78, no.4, pp.497 - 518

ISSN
1225-4568
DOI
10.12989/sem.2021.78.4.497
URI
http://hdl.handle.net/10203/285936
Appears in Collection
ME-Journal Papers(저널논문)
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