Publicado 6 números por año
ISSN Imprimir: 2152-5102
ISSN En Línea: 2152-5110
Indexed in
Numerical Simulation of Water Entry of Seafloor Mining Tool with Free Fall Motion
SINOPSIS
The hydrodynamic problem of a two-dimensional model of seafloor mining tool entering still water vertically with free fall motion is analyzed based on the velocity potential theory. Simulations are performed using Navier−Stokes numerical method in conjunction with an interface-capturing VOF method employing CFD code Fluent, the time histories of velocity and pressure during the impact process are obtained. Residual air entrained between the bottom of mining tool and free water surface is observed, influence which exerts on impact is discussed, the concept of impact added mass is presented to express the coupled function between air-rigid body-water during water entry process. Two dimensionless ratios are determined which the drop simulations should comply with to simulate an average slam: drop height ratio and mass ratio. The relationships between dimensionless ratios and several important parameters derived from simulation results are discussed. The numerical results can provide an important principle for free fall water entry experiments.
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