Sharp-interface immersed boundary lattice Boltzmann method with reduced spurious-pressure oscillations for moving boundaries

Li Chen, Yang Yu, and Guoxiang Hou
Phys. Rev. E 87, 053306 – Published 31 May 2013

Abstract

A sharp-interface immersed boundary lattice Boltzmann method (IBLBM) is developed to reduce spurious-pressure oscillations in moving boundary problems. We adopt a cut-cell-based method, i.e., the partially saturated computational cell method, because the primary cause of spurious-pressure oscillations is the failure to obey the geometric conservation law near the boundary in the sharp-interface IBLBM. We modify a sharp-interface IBLBM (ghost fluid method) to fit the cut-cell approach. This boundary condition can guarantee the Dirichlet and Neumann boundary conditions for velocity and pressure. Some simulations are shown to test the validity of the method, including a circular cylinder with motions that are at rest, moving, oscillatory, and neutrally buoyant. The results illustrate that the method reduces effectively spurious pressure and can simulate moving boundary problems, especially when pressure field accuracy is a key concern.

  • Received 21 December 2012

DOI:https://doi.org/10.1103/PhysRevE.87.053306

©2013 American Physical Society

Authors & Affiliations

Li Chen*, Yang Yu, and Guoxiang Hou

  • School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China

  • *jasonchencl@gmail.com
  • Corresponding author: houguoxiang@163.com

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Issue

Vol. 87, Iss. 5 — May 2013

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