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Characteristic Analysis of Nonlinear Sloshing in Baffled Tank

격막 설치에 따른 비선형 슬로싱 특성 연구

  • 이홍우 (부산대학교 기계설계공학과) ;
  • 조진래 (부산대학교 기계공학부)
  • Published : 2005.11.01

Abstract

In this paper, we intend to introduce a nonlinear finite element method based on the fully nonlinear potential flow theory in order to simulate the large amplitude sloshing flow in two-dimensional baffled tank subject to horizontally forced excitation. The free surface is tracked by a direct time differentiation scheme with the four-step predictor-corrector time integration method. The flow velocity is accurately recovered from the velocity potential by second-order least square method. In order to maintain the finite element mesh regularity and total mass, the semi-Lagrangian surface tracking method with area conservation is applied. According to the numerical formulae, we perform the parametric experiments by varying the installation height and the opening width of baffles, in order to examine the effects of baffle on the nonlinear liquid sloshing. From the numerical results, the hydrodynamic characteristics of the large amplitude sloshing are investigated.

Keywords

Nonlinea. Sloshin;Baffled Tank;Semi-Lagrangian Free Surface Tracking;Direct Time Differentiation;Baffle Installation Height;Opening Width

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