(MPS “Moving Particle Semi-implicit”)

Particle-Based Method

The main objective of the development of the particle-based simulation system is the investigation of highly nonlinear hydrodynamics.

Based on a meshless, fully-Lagrangian description, the Moving Particle Semi-implicit (MPS) method is extremely suitable for transient free-surface flows involving fragmentation and merging of fluid, complex-shaped multi-bodies with moving or deformable boundaries as well as multi-physics phenomena.

Examples of typical cases analyzed by the method are the sloshing inside partially filled tanks, green water on deck of floating structures, mixing of fluids and oil leakage, water flooding and stability in damaged oil carriers and so on. Due to the flexibility of the method, it has also been applied to the modeling of solids to solve hydro-elastic or multiple bodies’ problems, building drainage systems and multiphase flows in porous media.

The current version of the MPS-TPN/USP particle-based simulation system has several improvements, such as: improved free surface tracking by NPCD technique, high-order gradient operator and improved PPE source-term with time-scale correction. These improvements result in an accurate pressure calculation with minimal unphysical oscillations.

For the simulation of practical engineering problems, which often involve large amount of particles, around 108 particles or more, a hybrid memory simulation system for massive parallel processing was developed as well in order to take advantage of the full processing capacity of the TPN/USP computer cluster.

TPN-USP Moving Particle Simulation (MPS)