In this work, the control of vortex-induced vibration (VIV) an elastically mounted cylinder with a pair porous rods is numerically investigated at Reynolds number 150. To calculate forces on moving media, efficient formula based momentum theorem proposed. The are placed behind angle 25°, and effects gap ratio (G) permeability (Da) VIV studied in detail. Based results obtained, it found that sma...

Afterbody—the portion of the body downstream shear layer separation points—was believed to be essential for vortex-induced vibration (VIV) a bluff body. A recent study by Zhao et al. [“Flow-induced D-section cylinders: An afterbody is not vibration,” J. Fluid Mech. 851, 317–343 (2018)] made an important forward demonstrate “an required VIV” through water tunnel experiments reversed prism. Howev...

Inspired by the cactus in nature, a cactus-like cross-sectional structure was proposed to achieve VIV suppression. The of elastically mounted cylinder realized based on ANSYS Fluent and User Defined Function (UDF). dynamic motion solved single-step time integration algorithms Newmark-β method. in-house code first validated studying 2DOF circular with small mass ratio over range U*=2~13, results...