An adaptive immersed boundary-lattice Boltzmann method for simulating a flapping foil in ground effect

作者：Wu, J.^*; Qiu, Y. L.; Shu, C.; Zhao, N.; Wang, X.

来源：Computers & Fluids, 2015, 106: 171-184.

DOI：10.1016/j.compfluid.2014.10.003

• Flapping foil
• Ground effect
• Enhancement of power extraction efficiency
• Adaptive immersed boundary-lattice
• Boltzmann method

An adaptive immersed boundary-lattice Boltzmann method (IB-LBM) for simulating two-dimensional moving boundary problems is presented in this work. On one hand, to accurately and efficiently simulate flow field, our recently developed solution-adaptive LBM (Wu and Shu, 2011) is employed. On the other hand, a smoothed discrete delta Yang et al., 2009) is utilized to suppress the non-physical force oscillations produced by IBM when dealing with the moving boundary problems. After simulating some validation cases including flows over a transversely oscillating circular cylinder and insect hovering flight in ground effect, the current method is employed to numerically investigate the ground effect on the performance of a flapping foil. In this study, the ground is represented by a flat or wavy plate. Due to the existence of the ground, the performance of the flapping foil is greatly changed. Higher lift force or power extraction efficiency can be achieved.

• 出版日期2015-1-5
• 单位中国船舶科学研究中心; 南京航空航天大学