This paper proposes a method of controlling the vortex-induced vibration (VIV) wind turbine towers by adding continuous trapezoidal straight spoiler plates (TS) onto their outer surface: fluid–solid coupling model was constructed to simulate processes Karman vortex generation and shedding on different surfaces an original tower (O–tower) with TS (TS–tower) assumed actual Re, while VIV frequenci...

Background: Mitral valve-in-valve (ViV) and valve-in-ring (ViR) are alternatives to surgical reoperation in patients with recurrent mitral valve failure after previous repair or replacement. Our aim was perform a large-scale analysis examining midterm outcomes ViV ViR. Methods: Patients undergoing ViR were enrolled the Valve-in-Valve International Data Registry. Cases performed between March 20...

Underwater fiber optic cables commonly traverse a variety of seafloor conditions, which leads to an uneven mechanical coupling between the cable and ocean bottom. On rough bathymetry, some portions might be suspended thus susceptible vortex-induced vibrations (VIV) driven by deep currents. Here, we examine potential distributed acoustic sensing (DAS) monitor deep-sea currents along sections und...

There have been many recent developments on machine learning about vortex induced vibration (VIV) in laminar flow. We extended these applications to turbulence by employing a state-of-the-art parameterized Navier–Stokes equations-based physics informed neural network (PNS-PINN). Turbulent flow past cylinder undergoing VIV motion with Reynolds number R e = 1 0 4 , is considered as an example. Wi...

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...

The hydrodynamic forces on an oscillating circular cylinder are predicted using neural networks under flow conditions where Vortex-Induced Vibrations (VIV) known to occur. derived network approximators then incorporated in a dynamical model that allows prediction of the motion given and initial conditions. Using experimental data, minimum-least-squares compensator is tuned includes linear stiff...

Viv Kendon 2, ∗ and Barry C. Sanders 4 QOLS, Optics Section, Blackett Laboratory, Imperial College, London, SW7 2BW, United Kingdom. School of Physics and Astronomy, University of Leeds, Leeds, LS2 9JT, United Kingdom. Institute for Quantum Information Science, University of Calgary, Alberta T2N 1N4, Canada Centre for Quantum Computer Technology, Macquarie University, Sydney, New South Wales 21...

Abstract The development of a low-cost Video Velocimeter (VIV) to estimate underwater bulk flow velocity is described. instrument utilizes simplified particle image correlation technique reconstruct an average vector from video recordings ambient particles. VIV uses single camera with set mirrors that splits the view into two stereoscopic views, allowing estimation vector. was validated in cont...