On the capability of the curvilinear immersed boundary method in predicting near-wall turbulence of turbulent channel flows

• 作者: Fei Liao Xiaolei Yang
• 来源期刊: 力学快报（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Solid Mechanics
• 页码范围: 213-218
• 页数: 6页
• 语种: 英文
• DOI: 10.3969/j.issn.2095-0349.2021.04.005

摘要

The immersed boundary method has been widely used for simulating flows over complex geometries. However, its accuracy in predicting the statistics of near-wall turbulence has not been fully tested. In this work, we evaluate the capability of the curvilinear immersed boundary (CURVIB) method in predict- ing near-wall velocity and pressure fluctuations in turbulent channel flows. Simulation results show that quantities including the time-averaged streamwise velocity, the rms (root-mean-square) of velocity fluc- tuations, the rms of vorticity fluctuations, the shear stresses, and the correlation coefficients of u ? and v ? computed from the CURVIB simulations are in good agreement with those from the body-fitted simula- tions. More importantly, it is found that the time-averaged pressure, the rms and wavenumber-frequency spectra of pressure fluctuations computed using the CURVIB method agree well with the body-fitted re- sults.