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New mathematical model to analysis fluid sloshing in 3D tanks with slotted middle baffle

Jamshidi, S ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.oceaneng.2022.112061
  3. Publisher: Elsevier Ltd , 2022
  4. Abstract:
  5. This work studies the natural frequencies and modes of liquid sloshing in a rectangular 3D tank with the slotted baffles in middle. A new vibrational model incorporating the pressure difference between the two sides of the baffle, using a transmission function in Laplace space is presented. To this end, a part of the baffle that includes the wall and the slot is modeled in Fluent software, to express this pressure difference as a function of the fluid velocity passing through the baffle. Then, using the boundary element method, and boundary conditions, the equations of the fluid domain are developed. In this research, the rigid baffle is surrounded by a three-dimensional irrotational velocity field of an ideal liquid, and the potential flow conditions are considered. So, the equations from the boundary element method are coupled with the equations of potential flow and other boundary conditions, and then the fluid free surface mode shapes and frequencies are extracted. In the following, after validating the proposed model, the effects of different slot sizes on the liquid sloshing parameters are analyzed. Also, the effects of parameters of the mentioned new vibrational method on the frequencies and damping of the system are investigated. © 2022
  6. Keywords:
  7. 3D sloshing ; Boundary conditions ; Laplace transforms ; Liquid sloshing ; Potential flow ; Sailing vessels ; Tanks (containers) ; Velocity ; 3d sloshing ; 3D tanks ; Boundary-element methods ; Fluid mode shape ; Fluid sloshing ; Mode shapes ; New mathematical model ; Pressure differences ; Slotted baffle ; Work study ; Boundary element method ; Boundary condition ; Flow velocity ; Numerical model
  8. Source: Ocean Engineering ; Volume 262 , 2022 ; 00298018 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0029801822013890