Effect of Reynolds number on amplitude branches of vortex-induced vibration of a cylinder

The effect of Reynolds number on curves the transverse-only motion amplitude a circular cylinder with body mass m∗=0.935 and damping ratio ζ=0.00502 in turbulent flow range is investigated systematically using two-dimensional in-house code developed based lattice Boltzmann method. Large eddy simulation chosen as turbulence model to describe viscous, incompressible Newtonian fluid immersed boundary method used impose condition moving surface. Multi-block adopted improve accuracy computational efficiency. It well established that when variation changes reduced velocity, there are three branches curve low cylinder, including initial, upper lower connected by two jumps. However, present work, velocity considered independent parameters. Detailed results provided for variations amplitude, frequency lift coefficient against lock-in region at different fixed numbers. show has branches. At calculated, only initial branches, higher range, Also, near jumps studied fixed. shows values very sensitive number.