This work explores the use of a trailing edge flap for mitigation Vortex Induced Vibrations (VIV) wind turbine blade in standstill. Fluid structure interaction simulations are performed, coupling computational fluid dynamics code with multi-body structural solver. A publicly available 96 m long is selected study, and labeled as IEA 10MW. The effects actuation range [−90°, 90°] analyzed, given s...

Abstract The drag and vortex induced vibration (VIV) characteristics of a multiple cylinder are investigated using the detached eddy simulations. cylinders consist single main twin auxiliary for deep sea mining riser. Tandem side-by-side arrangements tested compared with cylinder. stationary case in range 0.5∼2.0 × 10 5 Reynolds number (Re). tandem arrangement shows smaller than those while it’...

Aim: Impacts of pre-operative atrial fibrillation or flutter (AF/AFL) upon repeat aortic valve replacement (r-AVR) patients’ risk-adjusted short-term outcomes is unknown. Methods: From 2005-2018, New York State AF/AFL versus non-AF/AFL adults’ r-AVR were compared. Primary endpoints included the Society Thoracic Surgeons’ 30-day operative mortality major morbidity (MM) composite and readmission ...

The vortex-induced vibration (VIV) of flexible risers is a complex fluid–structure interaction (FSI) phenomenon. In this study, we conducted numerical simulation method based on the slicing to study deep-sea with different slenderness ratios and uniform flow velocities. combines finite element model riser structure two-dimensional field slices solved by Fluent solver. was realized self-compiled...

Abstract Modern wind turbines are prone to Vortex Induced Vibrations (VIV). In the present work, an engineering semi-empirical framework is proposed that assesses VIV aero-elastic instabilities of turbine configurations. The procedure employs tools relying on airfoil polars. It uses state-of-the-art tool hGAST along with EUROCODE for steel structures extended provides missing modal input data (...

Objectives Biological prostheses for surgical aortic valve replacement (sAVR) are increasingly being considered in patients < 60 years of age. Likely, preserving the option of performing a transcatheter valve-in-valve (ViV) procedure in cases of structural valve deterioration has contributed to this development. We assessed the use pattern in sAVR over an 11-year period. Methods From 2002 throu...

Hydrogen bonds dominate many chemical and biological processes, and chemical modification enables control and modulation of host-guest systems. Here we report a targeted modification of hydrogen bonding and its effect on guest binding in redox-active materials. MFM-300(VIII) {[VIII2(OH)2(L)], LH4=biphenyl-3,3',5,5'-tetracarboxylic acid} can be oxidized to isostructural MFM-300(VIV), [VIV2O2(L)]...

The flow-induced vibration (FIV) of a rectangular cylinder with side ratio 4 at Re = 300 is numerically investigated by two-dimensional spectral-element method. constrained to vibrate only in the cross-flow direction. effects mass and damping are studied. Boss typical FIV, vortex-induced (VIV), galloping were found. Although quasi-steady theory predicts that will not occur for 4:1 cylinder, we ...