Sharp interface immersed-boundary/level-set method for wave-body interactions

  • Authors:

  • Jianming Yang;Frederick Stern

  • Affiliations:

  • IIHR - Hydroscience and Engineering, University of Iowa, Iowa City, IA 52242, USA;IIHR - Hydroscience and Engineering, University of Iowa, Iowa City, IA 52242, USA

  • Venue:
  • Journal of Computational Physics
  • Year:
  • 2009

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Abstract

A sharp interface Cartesian grid method for the large-eddy simulation of two-phase turbulent flows interacting with moving bodies is presented. The overall approach uses a sharp interface immersed boundary formulation and a level-set/ghost-fluid method for solid-fluid and fluid-fluid interface treatments, respectively. A four-step fractional-step method is used for velocity-pressure coupling, and a Lagrangian dynamic Smagorinsky subgrid-scale model is adopted for large-eddy simulations. A simple contact angle boundary condition treatment that conforms to the immersed boundary formulation is developed. A variety of test cases of different scales ranging from bubble dynamics, water entry and exit, landslide-generated waves, to ship hydrodynamics are performed for validation. Extensions for high Reynolds number ship flows using wall-layer models are also considered.