Real-time simulation of impact waves in LNG ship tanks with Lattice Boltzmann single-phase models

Volume
2016
Start Page
843
End Page
850
Citation
Proceedings of the International Offshore and Polar Engineering Conference (2016-January): 843-850 (2016)
Contribution to Conference
26th Annual International Ocean and Polar Engineering Conference, ISOPE 2016  
Publisher
International Society of Offshore and Polar Engineers (ISOPE)
ISBN of container
978-1-880653-88-3
This contribution addresses the efficient numerical simulation of wave impact on the side walls of two-dimensional containers. For the flow field calculations, an efficient Lattice Boltzmann Method (LBM) is used. Whilst modeling essentially similar physics as classical continuum mechanics procedures, LBM features a number of performance-related advantages, particularly concerning data locality and parallel computing. For the numerical analysis of wave impact, a single-phase model is employed. The model tracks the free surface with a conventional VOF technique and represents the aerodynamics by proper kinematic and dynamic free surface boundary conditions at the phase interface. The numerical simulations are conducted with the GPU-accelerated free-surface flow solver ELBE. Thanks to the high efficiency of the numerical method and the GPU implementation, the sloshing behavior can be predicted in (or near) real-time, including impact pressure details. In this contribution, the numerical results will be discussed in detail, including a series of 2D validation cases. Limitations of the free-surface model and potential extensions to fully-resolved air-phase dynamics will be discussed.
Subjects
ELBE
Impact pressure
LBM
Tank sloshing
DDC Class
600: Technik
620: Ingenieurwissenschaften