International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Effects of boundary layer and liquid viscosity and compressible air on sloshing characteristics

  • Zou, Chang-Fang (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University) ;
  • Wang, De-Yu (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University) ;
  • Cai, Zhong-Hua (State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University)
  • Received : 2015.01.14
  • Accepted : 2015.04.24
  • Published : 2015.07.31
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Abstract

In this paper, numerical investigations for tank sloshing, based on commercial CFD package FLUENT, are performed to study effects of boundary layer grid, liquid viscosity and compressible air on sloshing pressure, wave height and rising time of impact pressure. Also, sloshing experiments for liquids of different viscosity are carried out to validate the numerical results. Through comparison of numerical and experimental results, a computational model including boundary layer grid can predict the sloshing pressure more accurately. Energy dissipation due to viscous friction leads to reduction of sloshing pressure and wave elevation. Sloshing pressure is also reduced because of cushion effect of compressible air. Due to high viscosity damping effect and compressible air effect, the rising time of impact pressure becomes longer. It is also found that liquid viscosity and compressible air influence distribution of dynamic pressure along the vertical tank wall.

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References

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