CFD simulations of three-dimensional violent sloshing flows in tanks based on MPS and GPU
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CFD simulations of three-dimensional violent sloshing flows in tanks based on MPS and GPU * Feng-ze Xie, Wei-wen Zhao, De-cheng Wan Computational Marine Hydrodynamics Lab (CMHL), School of Naval Architecture, Ocean and Civil Engineering, State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China (Received May 30, 2020, Revised July 9, 2020, Accepted July 10, 2020, Published online August 4, 2020) ©China Ship Scientific Research Center 2020 Abstract: For violent sloshing, the flow field becomes complicated and 3-D effect is non-negligible. In addition to the excitation direction, the wave can also propagate perpendicular to the excitation direction. Due to the superposition of waves from different directions, the impact pressure imposed on the wall of the tank may increase. In this paper, our in-house solver MPSGPU-SJTU based on moving particle semi-implicit (MPS) method coupled with GPU techniques is employed for the liquid sloshing simulation, to study the factors leading to the 3-D effect. Firstly, a series of sloshing simulations are carried out to validate the reliability of present solver. Then, the sensitivity of 3-D effect against some parameters, such as excitation frequency, dimensions of the tank and filling ratio, is checked through numerical simulations. Time histories of pressure obtained by 2-D and 3-D simulations are compared to judge the occurrence of 3-D effect. It concludes that effects of those parameters are all significant. Key words: Liquid sloshing, 3-D effect, sensitive parameters, moving particle semi-implicit (MPS) method, MPSGPU-SJTU solver
Introduction Due to the uneven distribution of energy in different regions, a large amount of energy needs to be transported from one area to another every year. Liquid sloshing is a significant issue in the transportation of liquefied natural gas, oil and liquefied petroleum gas. The liquid inside a partially filled tank will oscillate violently and exert large impact pressure on the tank under the external excitation, especially when the excitation frequency is close to the natural frequency of sloshing. Therefore, many researchers have investigated the characters and mechanisms of liquid sloshing. Many approaches have been used to study the impact loads induced by the sloshing. Kim et al.[1] * Project supported by the National Natural Science Foundation of China (Grant Nos. 51909160, 51879159), the National Key Research and Development Program of China (Grant Nos. 2019YFB1704200, 2019YFC0312400), the Chang Jiang Scholars Program (Grant No. T2014099) and the Innovative Special Project of Numerical Tank of Ministry of Industry and Information Technology of China (Grant No. 2016-23/09). Biography: Feng-ze Xie (1995-), Male, Ph. D., E-mail: [email protected] Corresponding author: De-cheng Wan, E-mail: [email protected]
applied marker and cell (MAC) method for simulating sloshing in 2-D and 3-D prismatic tanks and studied the influence of internal baffles on pressure impact. Lee et al.[2] adopted Flow3D solve
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