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Numerical Investigation Baffle Position in Rectangular Tank to Reduce Sloshing Interface between Liquid and Gas Phase

Affiliations

  • Mechanical Engineering Faculty, Sharif University of Technology, Tehran, Iran, Islamic Republic of
  • Faculty of Mechanical Engineering, Tarbiat Modares University, Tehran, Iran
  • Department of Mechanical Engineering of Tarbiat Modares University, Tehran, Iran

Abstract


Objectives: In this study, sloshing interface in the 2D and 3D tanks were investigated by Open FOAM software Methods/ Statistical Analysis: The obtained results were in good agreement with experimental results. 2D and 3D results that were based on the first natural frequency excitement and ratio of A⁄L<0.1 (stimulation amplitude relative to the length of tank) were very close together. Findings: Rectangular tank with two phase such as gas and liquid was simulated with and without baffle under horizontal excitement in first natural frequency. The torque on the baffle, the height of the liquid in the FS and pressure on the wall of tank for different height of the baffle (installed at the bottom of the tank) were studied. Baffle was mounted in the bottom of the tank, height equal to half the initial height of the liquid. In Previous studies, baffles have been mounted at the liquid part on bottom of tank. In this study, in order to increase efficiency of baffles and reduce the torque exerted on it, baffles were installed in gas part on top wall and only tangent to the surface of liquid in first time. Installing baffles in the roof of tank reduce sloshing, because less torque entered on it in comparison with baffle on bottom of the tank. Application/Improvement: Installed baffles in top of the tank relative to optimum baffle in bottom decreased wave amplitude about 34 percent and exerted torque became half.

Keywords

Sloshing, First Natural Frequency, Baffle

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