Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)
Online ISSN : 1883-8944
Print ISSN : 1884-2399
Paper (In Japanese)
Dynamic stabilizer for an accurate DEM-MPS method
Naoki TSURUTAAbbas KHAYYERHitoshi GOTOH
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2013 Volume 69 Issue 2 Pages I_1006-I_1010

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Abstract

When armor stones are dumped into water from a hopper above a water surface, a violent motion of water surface may arise from violent entries of stones. These violent behaviors bring a problem of numerical instability even in computation by particle methods. A stability of semi-implicit schemes, such as MPS or ISPH, depends on control of unphysical pressure fluctuations. Hence accurate particle methods are necessary in computation of solid-liquid two-phase flow with violent motion of water surface. In particular, around interface of solid and liquid phases, a pressure fluctuation is apt to be locally high. In this study, the DS (Dynamic Stabilization) scheme is introduced into the DEM-MPS method in order to resolve the problem, and its validity is examined by some numerical benchmark tests through the comparison with results of the previous DEM-MPS method.

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© 2013 by Japan Society of Civil Engineers
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