Showing papers in "Journal of Fluids and Structures in 2014"

TL;DR: An overview of the state-of-the-art investigations on the recently developed oscillating foil energy converters is presented in this article, where a summary of available knowledge and up-to-date progress in the application of such bio-inspired systems for renewable energy devices is provided.

TL;DR: In this paper, the authors conduct experimental measurements on a dam break flow over a horizontal dry bed in order to provide a detailed insight, with emphasis on the pressure loads, into the dynamics of the dam break wave impacting a vertical wall downstream the dam.

TL;DR: In this article, a comprehensive comparison was conducted on the identification of coherent structures in fluid flow using Proper Orthogonal decomposition (POD) and Dynamic Mode Decomposition (DMD).

TL;DR: In this paper, the influence of corner shaping on the aerodynamic behavior of square cylinders is studied through wind tunnel tests, and the analysis and the discussion presented in this paper are focused on the low angle of incidence range.

TL;DR: In this paper, the complex self-sustained oscillations arising from the interaction of an oblique shock with a flexible panel in both the inviscid and viscous regimes have been investigated numerically.

TL;DR: In this article, the authors investigated the variation of the vortex shedding flow in the axial direction of the cylinder and studied the transition of the flow from two-dimensional (2D) to three-dimensional(3D) for VIV of a cylinder.

TL;DR: In this article, the authors developed a reduction scheme based on the identification of continuous time recursive neural networks from input-output data obtained through high fidelity simulations of a nonlinear aerodynamic model at hand.

TL;DR: The flow field around a single flexible net and two flexible nets with a spacing distance is presented and both the configuration of the flexible nets and the flow velocity results are in accordance with those of the corresponding physical model tests.

TL;DR: In this paper, a fully Lagrangian particle-based method is developed for simulating the FSI (Fluid-Structure Interaction) problems corresponding to incompressible fluid flows and elastic structures.

TL;DR: In this paper, the authors investigate the influence of cavity-induced vibrations on the dynamic response and stability of a NACA66 hydrofoil at 8° angle of attack at Re=750 000 via combined experimental measurements and numerical simulations.

TL;DR: In this article, an incompressible smoothed particle hydrodynamics (ISPH) model is developed for the simulation of fluid-structure coupling problems, especially for moving structures.

TL;DR: In this article, the wake-induced vibration (WIV) of two staggered cylinders with two degrees of freedom (2-dof) was investigated by experiments in a water channel for Reynolds number between 2000 and 25,000.

TL;DR: In this paper, a reduced-order state-space model for a pitching and plunging airfoil is presented, which includes multiple inputs (pitch, plunge, and surge) and explicit parameterization by the pitch-axis location.

TL;DR: In this paper, the effect of flexible supports, modelled as linear translational and rotational springs, is appropriately considered in the equation of motion rather than in the boundary conditions, and a general set of second-order ordinary differential equations emerges, in which, by setting the stiffness of the end-springs suitably, one can readily investigate the dynamics of various systems with either classical or nonclassical boundary conditions.

TL;DR: In this paper, a flow-induced fluctuating lift (C Lf ) and drag (C Df ) forces and Strouhal numbers (St) of a cylinder submerged in the wake of another cylinder are investigated experimentally for Reynolds number (Re)=9.7×10 3 -6.5×10 4.

TL;DR: A series of experiments describing the dynamic response resulting from vortex shedding excitation, on isolated long flexible cylinders with two different low mass ratios (mass to displaced fluid mass), are presented in this article.

TL;DR: In this paper, the effect of free surface on the drag and lift coefficients of an AUV was investigated using computational fluid dynamics, and the results showed that the variation of the AUV's drag coefficients with the submergence depth was sensitive to AUV speed.

TL;DR: In this paper, the authors investigated the energy efficiency of vortex-induced vibrations of cables and found that the maximum efficiency is close to the value reached with an elastically mounted rigid cylinder.

TL;DR: In this paper, the authors reviewed previous studies on the flow around and flow-induced noise produced by a finite wall-mounted cylinder (FWMC) of circular and square cross section.

TL;DR: In this article, an adaptive fuzzy sliding mode control (AFSMC) scheme is applied to actively suppress the two-dimensional vortex-induced vibrations (VIV) of an elastically mounted circular cylinder, free to move in in-line and cross-flow directions.

TL;DR: In this article, the effects of flexibility and active control on the power-extraction capability of a flapping plate flow energy harvester in a viscous uniform flow is simulated using a two-dimensional numerical approach.

TL;DR: In this paper, the effects of rod-to-cylinder spacing ratio, rod and cylinder diameter ratio, cylinder Reynolds number, number of control rods and angle of attack on the hydrodynamics of the main circular cylinder are investigated.

TL;DR: In this paper, the authors used the Large Eddy Simulation (LES) technique to simulate the flow around a generic container freight wagon model, which consists of one 11.8 m standard length container placed on a wagon.

TL;DR: In this article, a traveling wave wall (TWW) was used to suppress the VIV of an elastically supported circular cylinder with two degrees of freedom at a low Reynolds number of 200.

TL;DR: In this article, the effects of different spacing parameters on the wind loading of ground and roof mounted solar arrays were investigated in a boundary layer wind tunnel test, where the effect of lateral and longitudinal spacing between panels was investigated.

TL;DR: In this paper, the authors investigated the transient wave-blockage interaction and its application to extended blockage detection in pipelines, where blockage-induced changes to the system resonant frequencies are observed.

TL;DR: In this paper, the influence of the axial nearby rigid distance on the dynamic response of a submerged disk is evaluated when the radial gap is very small, and the effects of the fluid depth and fluid viscosity on the natural frequencies and damping ratio of the submerged disk are studied.

TL;DR: In this paper, the effect of partially closed in-line valve, viscoelasticity, and unsteady friction on the transient behavior of a pressurized pipe is examined by considering global energy quantities evaluated by means of a onedimensional numerical model calibrated on the basis of a huge amount of laboratory tests.

TL;DR: In this article, the behavior of two-dimensional symmetric flapping wings moving in a viscous fluid is investigated, and extensive testing is carried out to investigate the resultant flight behavior related to the ability to take-off or accelerate the flapping wing system away from a starting location.