2弹性板自振荡运动的虚拟区域法直接数值模拟

Direct Numerical Simulation of Fictitious Domain Method of Two-flexible-filament Self-oscillation Motion

采用分布式拉格朗日乘子/虚拟区域法(DLM/FD)对2弹性板在均匀来流中的自振荡运动进行了直接数值模拟。在合适的系统参数下,增大2板间距或雷诺数,2弹性板从同相位振荡跃迁到反相位振荡;随着剪切模量的增加,弹性板最初从反相位振荡转变为同相位振荡,最后又从同相位振荡过渡到反相位振荡;密度比的变化则对弹性板振荡模式的影响较小。本文的计算结果验证了实验结论,并给出了其他系统参数对2弹性板系统的影响。

The paper proceeded direct numerical simulation of two-flexible-filament motion in even flow with DLM/FD method.Under appropriate system parameters conditions,increasing distance between two filaments or Reynolds number,oscillation of the two filaments leaps from in-phase mode into anti-phase with the increasing shearing modular,the flexible filaments initially transfer from anti-phase oscillation into in-phase oscillation,at last from in-phase into anti-phase oscillation again.The filament density has little influence on the oscillating mode.The calculation results agree with the experiment conclusion,give out the influence of other system parameters on two-flexible-filament.