Fluids and structures impact is one of the common phenomena in nature, and it widely exists in engineering practice, including ship hydrodynamic slamming, wave impact on offshore platforms, plunging wave on coastal structures, emergency landing of aircrafts at sea as well as impact of ultra-cold droplets and ice lumps under aviation conditions. In this paper, a two dimensional (2-D) solver for Navier-Stokes equations is developed and applied in the numerical simulation of the impact on a rigid plate by a liquid square. The computational domain is discretized by Finite Volume Method (FVM). The Volume of Fluid (VOF) technique is used to track the free surface and the Piecewise-Linear Interface Construction (PLIC) is used for reconstruction. The Continuum Surface Force (CSF) model is used to account for the surface tension. The convective term and the diffusive term are upwind and centrally differenced respectively. The Inner Doubly Iterative Efficient Algorithm for Linked Equations (IDEAL) is used to decouple the pressure and velocity. Based on the proposed techniques, collapse of water column is simulated and convergence study is performed for the validation of the numerical solver. Then the impact of a free falling liquid body is simulated, and the effect of volume and initial height of the liquid body is analyzed. In addition, the impact on a plate with a liquid layer is also simulated to study the effect of falling height on a liquid floor.
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Foundation item: This study was financially supported by the Equipment Pre-Research Field Foundation (Grant Nos. 61402100201, 6142204180408, and 6142407180108) and the National Natural Science Foundation of China (Grant Nos. 51579052 and 51679045).
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Guo, C., Guo, H., Liu, L. et al. Numerical Simulation on the Impact of A Liquid Square on Rigid Plate and Liquid Layer. China Ocean Eng 34, 362–373 (2020). https://doi.org/10.1007/s13344-020-0033-5
- fluid impact
- liquid square
- free surface evolution
- pressure distribution
- impact force