Journal of Central South University

, Volume 18, Issue 3, pp 658–665 | Cite as

Numerical simulation of calm water entry of flatted-bottom seafloor mining tool

  • Xiao-zhou Hu (胡小舟)Email author
  • Shao-jun Liu (刘少军)


The hydrodynamic problem of a two-dimensional model of seafloor mining tool entering still water vertically at constant speed was analyzed based on the velocity potential theory. For the assumption that the water entry occurs with very short time interval, the viscosity and gravity of fluid were neglected. Considering the characteristic shape of it, the seafloor mining tool was simplified as a flat-bottom body. The governing equations were the Reynolds time-averaged equations and the k-ɛ model. Finite element analysis was undertaken using the CFD software, Fluent. The impact pressures on the bottom of the mining tool were computed based on the improved volume of fluid method (VOF). The pressure distribution, the maximum impact pressure, and the impact duration time during the water entry of mining tool are presented at various deploying velocities, the two peak pressures in the impact process are observed, and the relationship between the maximum impact pressure and the deploying velocity is obtained. The results are compared with those based on other prediction theories and methods.

Key words

water entry flatted-bottom body constant speed deployment 


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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Xiao-zhou Hu (胡小舟)
    • 1
    Email author
  • Shao-jun Liu (刘少军)
    • 1
  1. 1.School of Mechanical and Electrical EngineeringCentral South UniversityChangshaChina

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