Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Ali H"'
Autor:
R.A.D. Akkermans, Ali H. Dawi
Publikováno v:
Journal of Sound and Vibration. 436:138-154
The present paper presents a comparison between two different approaches for calculating far-field noise of two square cylinders in tandem arrangement. Experimental data show that a flow past such an arrangement results in aeolian tones as well as br
Autor:
Meghashyam Panyam, Jamie Noel, Ali H. Alhadidi, Imran Akhtar, Mohammed F. Daqaq, Amin Bibo, Benjamin Caldwell
Publikováno v:
Journal of Vibration and Acoustics. 141
Emergence of increasingly smaller electromechanical systems with submilli-Watt power consumption led to the development of scalable micropower generators (MPGs) that harness ambient energy to provide electrical power on a very small scale. A flow MPG
Publikováno v:
Nonlinear Dynamics. 77:667-680
We investigate in detail the passive control of vortex-induced vibrations of a freely oscillating circular cylinder using a non-linear energy sink consisting of a secondary system having linear damping and an essential non-linear cubic stiffness. The
Publikováno v:
Nonlinear Dynamics. 70:1355-1363
The concept of exploiting galloping of square cylinders to harvest energy is investigated. The energy is harvested by attaching a piezoelectric transducer to the transverse degree of freedom. A representative model that accounts for the coupled cylin
Autor:
Osama A. Marzouk, Ali H. Nayfeh
Publikováno v:
International Journal of Non-Linear Mechanics. 45:821-833
The flow over a stationary cylinder is self-excited with a specific natural frequency fN. When the cylinder is moved harmonically in the cross-flow direction, the response of the flow (in terms of the lift force) will contain two frequencies, namely,
Publikováno v:
Journal of Vibration and Control. 13:1065-1091
Numerical simulations of the flow past a stationary circular cylinder at different Reynolds numbers (Re) have been performed using a computational fluid dynamics (CFD) solver that is based on the unsteady Reynolds-averaged Navier—Stokes equations (
Autor:
Ali H. Nayfeh, Haider N. Arafat
Publikováno v:
International Journal of Non-Linear Mechanics. 39:1671-1685
We investigate the non-linear forced vibrations of a thermally loaded annular plate with clamped–clamped immovable boundary conditions in the presence of a three-to-one internal resonance between the first and second axisymmetric modes. We consider
Autor:
Ali H. Nayfeh, Farouk M. Owis
Publikováno v:
European Journal of Mechanics - B/Fluids. 23:339-351
The hydrodynamic cavitation over axisymmetric projectiles is computed using the unsteady incompressible Navier–Stokes equations for multi-fluid elements. The governing equations are discretized on a structured grid using an upwind difference scheme
Autor:
Farouk M. Owis, Ali H. Nayfeh
Publikováno v:
Journal of Fluids Engineering. 125:459-468
For high-speed cavitating flows, compressibility becomes significant in the liquid phase as well as in the vapor phase. In addition, the compressible energy equation is required for studying the effects of the propulsive jet on the cavity. Therefore,
Autor:
Ali H. Nayfeh, Waleed Fekry Faris
Publikováno v:
Shock and Vibration, Vol 9, Iss 3, Pp 143-150 (2002)
We consider the problem of large-amplitude vibrations of a simply supported circular flat plate subjected to harmonically varying temperature fields arising from an external heat flux (aeroheating for example). The plate is modeled using the von Karm