Abstract
The mesh-free particle method is the latest method in the computational fluid dynamics field. It has become well-known due to its application for simulating any kind of interface deformation and fragmentation, including large disturbance on the interface. In this study, the moving particle semi-implicit (MPS) method has been developed for multi-phase to simulate mobile (erodible)-bed under violent flows such as a dam break. In order to develop the MPS method, multi-phase particle interaction models including self-buoyancy and surface tension models were employed. All of the newly adopted particle interaction models were modified by the author. When fluids collide with the soil bed, the erodible bed can be liquefied. In this regard, polyethylene oxide (PEO) solution was used as a mobile bed. The water column captured by the gate collapsed after opening the gate, and it then propagated over a mobile bed. The mobile bed has various thicknesses based on corresponding experiments. Moreover, the dam break on an inclined tank was also simulated to investigate the swash uprush problem. The maximum velocity and height of mixed flows were measured at a certain point, which aligned with the corresponding experiment. All of the simulation results were compared with those obtained from some experimental work.
Highlights
Due to the highly concentrated energy, the flows induced by a dam break are very violent and include a large deformation of free surface and non-linearity
In the experimental and theoretical method, the dynamics of strong turbulence at the free surface and wave profiles were investigated by Brocchini et al [6,7]
The newly developed moving particle semi-implicit (MPS) method for multi-phase flows by adding multi-phase particle interaction models was used to simulate the mobile-bed behavior induced by the dam break
Summary
Due to the highly concentrated energy, the flows induced by a dam break are very violent and include a large deformation of free surface and non-linearity. Computational fluid dynamics (CFD) is an effective method for simulating the violent flows with the large deformation of a free surface including the dam break problem. Despite using these special treatments, it has been difficult to simulate the complicated phenomena due to large deformation, fragmentation, and coalescence in order to solve those problems [9] Another problem of the conventional grid-based CFD method is a numerical diffusion induced by an advection term of the governing equation [10,11]. The newly developed MPS method for multi-phase flows by adding multi-phase particle interaction models was used to simulate the mobile-bed behavior induced by the dam break. Both comparisons show that they align well between the experimental and numerical simulation
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
