A sharp interface immersed boundary/VOF model coupled with wave generating and absorbing options for wave-structure interaction

Cheng Zhang, Nansheng Lin, Youhong Tang, Chengbi Zhao

    Research output: Contribution to journalArticlepeer-review

    23 Citations (Scopus)

    Abstract

    In this study, a finite difference model for the viscous incompressible Navier-Stokes (N-S) equations is developed to investigate problems with respect to wave-structure interaction. A two-step projection algorithm is employed to discretize the N-S equations on a fixed Cartesian grid. Coupled with wave generating and absorbing options, the model captures free surfaces using a volume-of-fluid method with a second-order piecewise linear interface construction (PLIC-VOF). In addition, a second-order sharp interface immersed boundary (SI-IB) method is utilized to account for the no-slip boundary condition on structure surfaces. The new model is capable of simulating free surface flows and their interaction with a stationary or moving structure, and wave generating and absorbing options are available in the model for some specific cases. To validate the model from different aspects, a series of numerical experiments are conducted. These tests include an oscillating cylinder in fluid without a free surface, liquid sloshing in a tank, water exit and entry of a horizontal cylinder, some wave generation and absorption tests, and a solitary wave over a submerged rectangular obstacle. Excellent agreement is obtained when the results are compared to analytical, experimental and other numerical results. Furthermore, two cases of a submerged and a semi-submerged ellipse rotating in a tank are investigated, and some significant phenomena are observed.

    Original languageEnglish
    Pages (from-to)214-231
    Number of pages18
    JournalComputers and Fluids
    Volume89
    DOIs
    Publication statusPublished - 20 Jan 2014

    Keywords

    • Free surface flow
    • Moving structures
    • Sharp interface immersed boundary method
    • Volume-of-fluid method
    • Wave generating and absorbing options
    • Wave-structure interaction

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