A Discrete-Forcing Immersed Boundary Method for Moving Bodies in Air–Water Two-Phase Flows

Journal of Marine Science and Engineering

Kevin Maki¹  Haixuan Ye¹  Yang Chen¹ 

[1] Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor, MI 48109, USA;

关键词: immersed boundary method;    air–water two-phase flows;    VoF method;    OpenFOAM;    finite volume method;   

DOI  :  10.3390/jmse8100809

来源: DOAJ

【 摘 要 】

For numerical simulations of ship and offshore hydrodynamic problems, it is challenging to model the interaction between the free surface and moving complex geometries. This paper proposes a discrete-forcing immersed boundary method (IBM) to efficiently simulate moving solid boundaries in incompressible air–water two-phase flows. In the present work, the air–water two-phase flows are modeled using the Volume-of-Fluid (VoF) method. The present IBM is suitable for unstructured meshes. It can be used combined with body-fitted wall boundaries to model the relative motions between solid walls, which makes it flexible to use in practical applications. A field extension method is used to model the interaction between the air–water interface and the immersed boundaries. The accuracy of the method is demonstrated through validation cases, including the three-dimensional dam-break problem with an obstacle, the water exit of a circular cylinder, and a ship model advancing with a rotating semi-balanced rudder. The flow field, free-surface profile and force on the immersed boundaries (IBs) are in good agreement with experimental data and other numerical results.

【 授权许可】

Unknown