Showing papers in "Journal of Fluids and Structures in 2004"

TL;DR: A comprehensive review of the progress made during the past two decades on vortex-induced vibration (VIV) of mostly circular cylindrical structures subjected to steady uniform flow is presented in this article.

TL;DR: A class of low-order models for vortex-induced vibrations is analyzed in this article, where a van der Pol equation is used to describe the near wake dynamics describing the fluctuating nature of vortex shedding and several types of linear coupling terms modelling the fluid-structure interaction are considered.

TL;DR: In this paper, the authors compare the performance of a harmonically heaving and pitching foil with four specific angle of attack profiles: a simple harmonic motion in both heave and pitch motion, a square wave, a symmetric sawtooth wave and a cosine function.

TL;DR: In this paper, the effects of geometrical nonlinearities on the aeroelastic behavior of high-aspect-ratio (HASR) wings were investigated.

TL;DR: In this article, the hydrodynamic problem of a two-dimensional wedge entering water through free fall motion is analyzed based on the velocity potential theory, where the gravity effect on the flow is ignored as our interest is over a short period of time.

TL;DR: In this article, the authors present some numerical results from a study of the dynamics and fluid forcing on an elastically mounted rigid cylinder with low mass-damping, constrained to oscillate transversely to a free stream.

TL;DR: In this paper, a reduced-order model (ROM) is developed for aeroelastic analysis using the CFL3D version 6.0 computational fluid dynamics (CFD) code, recently developed at the NASA Langley Research Center.

TL;DR: In this paper, the authors investigate the hydrodynamic interactions between oscillating flexible cylinders and fluid forces using a discrete vortex method, and compare results obtained using the quasi-steady theory, as proposed by Bearman et al.

TL;DR: In this article, the surface pressure distribution, vortex shedding frequency, and wake flow behind a porous circular cylinder were studied when continuous suction or blurring was used to control the wake flow.

TL;DR: In this article, the authors investigated the effect of small degrees of spanwise waviness on the wake of a wavy cylinder and found that a small degree of sparseness could have a significant effect on drag reduction and a corresponding suppression of cylinder vibration.

TL;DR: In this paper, a 2D LES study of the VIV response of a circular cylinder at a Reynolds number of 8000 with a range of damping ratios and natural frequencies was performed.

TL;DR: In this article, structural equations of motion based on nonlinear beam theory and the ONERA aerodynamic stall model are used to study the effects of geometric structural nonlinearity on flutter and limit cycle oscillations (LCO) of high-aspect-ratio wings.

TL;DR: In this article, an airfoil with control surface freeplay (a common structural nonlinearity) is used to investigate transonic flutter and limit cycle oscillations, assuming the shock motion is small and in proportion to the structural motions.

TL;DR: In this paper, the effects of surface waviness of wavy cylinders on mean drag and fluctuating lift reduction were experimentally investigated in a low speed wind tunnel having a 0.6m×0.6mm cross-section and a free-stream turbulence intensity less than 0.2%.

TL;DR: In this article, the free end of a finite circular cylinder embedded in an atmospheric boundary layer (ABL) over open terrain was investigated experimentally by modifying the free-end corner shape.

TL;DR: In this paper, a finite element model with discretization sufficient to resolve the convective wavenumbers in the flow excitation field is used for the study of plate vibrations due to turbulent boundary layer (TBL) excitation.

TL;DR: In this paper, the simulation of the flow in a flat, "two-dimensional" laboratory centrifugal pump is presented, where the inlet is modelled by a point source and the blades of the impeller are covered with vortex elements with discrete, bound vortices.

TL;DR: An evaluation of a two-dimensional moving rigid heart valve, in which a fictitious domain method is used to describe fluid–structure interaction, indicates that this method is well suited for the analysis of valve dynamics and ventricular flow in physiologically realistic geometries.

TL;DR: In this article, a reduced-order aeroelastic model is used to predict the limit-cycle oscillations (LCOs) of a nonlinear panel in supersonic flow.

TL;DR: In this article, the amplitude limitation of the LCOs results from a slightly nonlinear dependency of lift and moment on the amplitude of the airfoil motion, and the results link the global aerodynamic force behavior to the observed LCO and the identified transonic dip.

TL;DR: Initial investigations suggest that the frequency of oscillations of the system is greater by approximately 30% for larger separations than for smaller separations and that the filaments appear to pass through a domain for which the oscillation is possibly quasi-periodic for intermediate values of the mutual separation.

TL;DR: In this article, structural and fluid finite elements (FEs) were used to simulate wind-induced bridge motions and predict the flutter limit, aiming at reducing the number of physical model tests currently required.

TL;DR: In this paper, the authors investigated the water-on-deck phenomena by considering a simplified two-dimensional flow problem and showed that the potential-flow model suffices to give a robust and efficient estimate of green-water loads until large breaking phenomena, usually following impact events, are observed.

TL;DR: In this paper, a higher-order method to calculate the motion of a floating, shallow draft, elastic plate of arbitrary geometry subject to linear wave forcing at a single frequency is presented.

TL;DR: In this paper, the influence of internal acoustic excitation on the aerodynamic performance of a circular cylinder in a uniform flow is studied by the phase-averaged measurements of fluid forces and flow fields around the cylinder.

TL;DR: In this article, a cross-section analysis of a double-wedge airfoil in hypersonic flow is performed using three different types of unsteady airloads: piston theory and complete Euler and Navier-Stokes solutions based on computational fluid dynamics.

TL;DR: In this article, a two dimensional mathematical model is developed to describe sloshing effects in rigid vessels, where velocitypotential is expressed in a series form, where each term is the product of a time function and the associated spatial function.

TL;DR: An analytical approach to predict the bending vibration of a very large floating structure of thin and elongated rectangular plate configuration, floating on water of shallow depth and under the action of a monochromatic head wave, is presented in this article.

TL;DR: In this article, a series of experiments were conducted to study the fluidelastic instability behavior of flexible tubes subjected to two-phase internal flow. But the results of these experiments were limited to a single-phase flow.

TL;DR: In this article, the structural nonlinearity in the control surface hinge is represented by both free-play and bilinear nonlinearities, which are linearized using the describing function method.