Multi-relaxation-time lattice Boltzmann model for axisymmetric flows

作者：Wang, Liang; Guo, Zhaoli^*; Zheng, Chuguang

来源：Computers & Fluids, 2010, 39(9): 1542-1548.

DOI：10.1016/j.compfluid.2010.05.007

• Lattice Boltzmann equation
• Multiple-relaxation-time
• Axisymmetric flow

In this paper, a lattice-Boltzmann equation (LBE) with multi relaxation times (MRT) is presented for axisymmetric flows. The model is an extension of a recent model with single-relaxation-time [Guo et al., Phys. Rev. E 79, 046708 (2009)], which was developed based on the axisymmetric Boltzmann equation. Due to the use of the MRT collision model, the present model can achieve better numerical stability. The model is validated by some numerical tests including the Hagen-Poiseuille flow, the pulsatile Womersley flow, and the external flow over a sphere. Numerical results are in excellent agreement with analytical solutions or other available data, and the improvement in numerical stability is also confirmed.

• 出版日期2010-10
• 单位华中科技大学; 中国石油天然气股份有限公司勘探开发研究院