A flexible forcing three dimension IB-LBM scheme for flow past stationary and moving spheres

作者：Dash, S. M.^*; Lee, T. S.; Lim, T. T.; Huang, H.

来源：Computers & Fluids, 2014, 95: 159-170.

DOI：10.1016/j.compfluid.2014.02.025

• Three dimensional flow
• Immersed boundary method
• Lattice Boltzmann method
• Flexible forcing
• Stationary and moving spheres
• Experimental visualisation

The recently proposed (Dash et al., 2013) flexible forcing immersed boundary (IB)-lattice Boltzmann method (LBM) is improved in this work to simulate three dimensional fluid-solid interaction problems. In conventional IB-LBM schemes, explicit calculation of the force density may produce unsatisfactory noslip boundary condition. This further leads to unphysical streamline penetrations and improper force/torque calculations for the stationary/moving spheres. Following an implicit calculation of the force density, a single Lagrangian velocity correction term is prescribed here to satisfy the no-slip condition within a convergence limit. This formulation is mathematically simple and with the help of flexible number of sub-iteration/forcing, the computational time is significantly reduced. The proposed new version of IB-LBM model is validated with three-dimension flow past stationary and moving spheres, and the results are found in excellent agreement with the data obtained from in-house experiments and previous literatures.

• 出版日期2014-5-22
• 单位中国科学技术大学