Journal
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
Volume 200, Issue 9-12, Pages 1113-1125Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2010.12.001
Keywords
Nonlinear free-surface motions; Impact loads; Step-by-step improvements; Reduced pressure fluctuation; Dam breaking; Liquid sloshing
Funding
- Ministry of Knowledge Economy of Korea
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The violent free-surface motions and the corresponding impact loads are numerically simulated by using the Moving Particle Semi-implicit (MPS) method, which was originally proposed by Koshizuka and Oka [10] for incompressible flows. In the original MPS method, there were several defects including non-optimal source term, gradient and collision models, and search of free-surface particles, which led to less-accurate fluid motions and non-physical pressure fluctuations. In the present study, how those defects can be remedied is illustrated by step-by-step improvements in the respective processes of the revised MPS method. For illustration, two examples are studied; (i) dam breaking problem and (ii) liquid sloshing inside a rectangular tank. The improvement of each step is explained and numerically demonstrated. The numerical results are also compared against the experimental results of Martin and Moyce [12] for dam-breaking problem and Kishev et al. [9] for sloshing problem. The numerical results for violent free-surface motions and impact pressures are in good agreement with their experimental data. (C) 2010 Elsevier B.V. All rights reserved.
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