Improvement of stability in moving particle semi-implicit method

Improvement of stability in moving particle semi-implicit method

Moving particle semi‐implicit (MPS) method is one of the particle methods, which can be used to analyze incompressible free surface flow without surface tracking by a mesh or a scalar quantity. However, MPS causes unphysical numerical oscillation of pressure with high frequencies. We proposed a new...

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Veröffentlicht in:International journal for numerical methods in fluids 2011-02, Vol.65 (6), p.638-654
Hauptverfasser: Kondo, Masahiro, Koshizuka, Seiichi
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Buildings. Public works
Computational methods in fluid dynamics
Dams and subsidiary installations
Exact sciences and technology
Fluid dynamics
free surface flow
Fundamental areas of phenomenology (including applications)
Hydraulic constructions
incompressibility
ISPH
MPS
numerical oscillation
particle methods
Physics
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Zusammenfassung:Moving particle semi‐implicit (MPS) method is one of the particle methods, which can be used to analyze incompressible free surface flow without surface tracking by a mesh or a scalar quantity. However, MPS causes unphysical numerical oscillation of pressure with high frequencies. We proposed a new formulation for the source term of Poisson equation of pressure. The proposed source term consists of three parts, one main part and two error‐compensating parts. With proper selection of the coefficients for the error‐compensating parts, we can suppress the unphysical pressure oscillation. Smoother pressure distributions are obtained in hydrostatic pressure and dam break problems. Copyright © 2010 John Wiley & Sons, Ltd.
ISSN:0271-2091
1097-0363
DOI:10.1002/fld.2207