In the present study, one of the cross-disciplinary problems known as vortex-induced vibration is numerically investigated. Effects of four different low mass-damping ratios; ζ = 0.013, 0.028, 0.074, and 0.124 of a smooth cylinder are taken into account for transition of shear layer 2 (TrSL2) type flow that falls between the Reynolds numbers from 2500 to 10,830 utilizing a two-dimensional cylinder that is free to move in normal-direction. Unsteady Reynolds-Averaged Navier–Stokes solutions indicate that the general trend is well captured with the adopted shear stress transport k-ω turbulence model, however, due to two-dimensional limitations some results are not consistent with experimental data. An inverse relation between the mass-damping ratio and the transition from the upper to the lower branch is detected. Change of drag and lift coefficients with the reduced velocities revealed that the maximum drag coefficient increases with reduced velocity until it reaches Ur = 5 and then decreases dramatically while the lift coefficients decrease consistently from the beginning.

在本研究中，数值研究了称为涡激振动的跨学科问题之一。四种不同的低质量阻尼比的影响；对于剪切层2（TrSL2）型流的转换，考虑到光滑圆柱体的ζ= 0.013、0.028、0.074和0.124，利用自由移动的二维圆柱体，该流动在2500到10,830的雷诺数之间在法线方向上。非稳态雷诺平均Navier–Stokes解表明，采用剪切应力传递k-ω湍流模型可以很好地把握总体趋势，但是由于二维限制，某些结果与实验数据不一致。检测质量阻尼比与从上分支到下分支的过渡之间的反比关系。