The present paper introduces a parametric optimization of several Active Flow Control (AFC) parameters applied to NACA-8412 airfoil at single post-stall Angle Attack (AoA) 15∘ and Reynolds number Re = 68.5×103. aim is enhance the efficiency maximize its lift. boundary layer separation point was modified using Synthetic Jet Actuators (SJA), carried on by systematically changing pulsating frequen...

Keywords: MHD flow control Nonlinear boundary control Active mixing enhancement Distributed parameter systems a b s t r a c t A nonlinear Lyapunov-based boundary feedback control law is proposed for mixing enhancement in a 2D magnetohydrodynamic (MHD) channel flow, also known as Hartmann flow, which is electrically conducting, incompressible, and subject to an external transverse magnetic field...

The transition of a standard thin disk to a radiatively inefficient accretion flow (RIAF) is expected to occur, when ṁ ∼ ṁcrit (ṁ = Ṁ/ṀEdd). The radiative efficiencies of accretion flows accreting at rates lower than the critical accretion rate ṁcrit become significantly lower than that of standard thin disks. It is believed that the initial transition radius is small just after the accretion m...

Observations are providing increasingly detailed quantitative information about the accretion flows that power such high energy systems as X-ray binaries and active galactic nuclei. Analytic models of such systems must rely on assumptions such as regular flow geometry and a simple, parameterized stress. Global numerical simulations offer a way to investigate the basic physical dynamics of accre...

The present work is an attempt to model, analyze, and control the flow at the base of an abruptly expanded circular duct by using design of experiments (DOE) and response surface methodology (RSM). Tiny-jets in the form of orifice were positioned at an interval of 900, 6.5 mm from the primary axis of the main jet of the nozzle. Experiments were conducted to measure two responses namely, base pr...

This paper presents an efficient and high-sensitive micro-sensor designed for wall shear stress measurement. The main technical application targeted is flow separation detection for closed-loop active flow control. The sensor is a temperature-resistance transducer operating on heat transfer. The device is micro-structured with three substrate-free wires presenting a high aspect ratio, and perio...

semi-active base isolation system has been proposed mainly to mitigate the base drift of isolated structures while in most cases, its application causes the maximum acceleration of superstructure to be increased. in this paper, designing optimal semi-active base isolation system composed of linear base isolation system with low damping and magneto-rheological (mr) damper has been studied for co...