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Transactions of Tianjin University

, Volume 21, Issue 1, pp 32–40 | Cite as

3D simulation of flow with free surface based on adaptive octree mesh system

  • Shaowu Li (李绍武)
  • Qian Zhuang (庄 茜)
  • Xiaoyun Huang (黄筱云)Email author
  • Dong Wang (王 东)
Article
  • 53 Downloads

Abstract

The technique of adaptive tree mesh is an effective way to reduce computational cost through automatic adjustment of cell size according to necessity. In the present study, the 2D numerical N-S solver based on the adaptive quadtree mesh system was extended to a 3D one, in which a spatially adaptive octree mesh system and multiple particle level set method were adopted for the convenience to deal with the air-water-structure multiple-medium coexisting domain. The stretching process of a dumbbell was simulated and the results indicate that the meshes are well adaptable to the free surface. The collapsing process of water column impinging a circle cylinder was simulated and from the results, it can be seen that the processes of fluid splitting and merging are properly simulated. The interaction of second-order Stokes waves with a square cylinder was simulated and the obtained drag force is consistent with the result by the Morison’s wave force formula with the coefficient values of the stable drag component and the inertial force component being set as 2.54.

Keywords

adaptive octree mesh 3D numerical flume spatially adaptive multiple particle level set 

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Copyright information

© Tianjin University and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Shaowu Li (李绍武)
    • 1
  • Qian Zhuang (庄 茜)
    • 1
    • 2
    • 3
  • Xiaoyun Huang (黄筱云)
    • 1
    • 2
    Email author
  • Dong Wang (王 东)
    • 1
  1. 1.State Key Laboratory of Hydraulic Engineering Simulation and SafetyTianjin UniversityTianjinChina
  2. 2.Key Laboratory of Water-Sediment Science and Water Disaster Prevention of Hunan ProvinceChangsha University of Science and TechnologyChangshaChina
  3. 3.School of Civil EngineeringTianjin Chengjian UniversityTianjinChina

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