Articles you may be interested in Interaction between a vortex generator and a synthetic jet in a crossflow A direct numerical simulation investigation of the synthetic jet frequency effects on separation control of low-Re flow past an airfoil Interaction of a synthetic jet with the flow over a low aspect ratio cylinder This study focuses on predicting the far-field momentum flux for axisymmetr...

The near-field structure of strongly buoyant jet issuing from a square nozzle at low Froude and Reynolds numbers is studied by using three-dimensional LIF flow visualization and scanning PIV. These experimental techniques allow the visualization of unsteady three-dimensional flow phenomenon occurring in the near-field of strongly buoyant jet. It is found that the buoyant jet is unstable to the ...

The magnetic field in an accretion disk is estimated assuming that all of the angular momentum within prescribed accretion disk radii is removed by a jet. The magnetic field estimated at the base of the jet is extrapolated to the blazar emission region using a model for a relativistic axisymmetric jet combined with some simplifying assumptions based on the relativistic nature of the flow. The e...

Achromatic breaks in afterglow light curves of gamma-ray bursts (GRBs) arise naturally when the product of the jet’s Lorentz factor γ and opening angle Θ j satisfies γΘ j ≫ 1. Magnetohydrodynamic (MHD) simulations of collimated GRB jets generally give γΘ j . 1, suggesting that MHD models are incapable of explaining jet breaks. We work within the collapsar paradigm and use axisymmetric relativis...

We present the results of detailed spatial and spectral analysis of the pulsar wind nebula (PWN) in supernova remnant Kes 75 (G29.7–0.3) using a deep exposure with Chandra X-ray observatory. The PWN shows a complex morphology with clear axisymmetric structure. We identified a onesided jet and two bright clumps aligned with the overall nebular elongation, and an arc-like feature perpendicular to...

The planar and axisymmetric variable-density flows induced in a quiescent gas by a concentrated source of momentum that is simultaneously either a source or a sink of energy are investigated for application to the description of the velocity and temperature far fields in laminar gaseous jets with either large or small values of the initial jet-to-ambient temperature ratio. The source fluxes of ...

• This paper describes a computational study of the thermal and chemical nonequilibrium occuring in a rapidly expanding flow of high-temperature air transported as a free jet from an orifice into lowdensity stationary air. Translational, rotational, vibrational and electron temperatures are treated separately, and in particular the vibrational temperatures are individually treated; a multi-vibr...

We have used the vectorised and parallelised magnetohydrodynamics code NIRVANA on the NEC SX-5 and the new SX-6 installation in parallel mode to simulate the interaction of jets with a galactic wind that might be typical for the star-bursting radio-galaxies of the early universe. The two simulations, one axisymmetric and one in 3D show that the jet pierces and destroys a thin and dense shell pr...

We consider a model for dusty gas flow that consists of the compressible Euler equations for the gas coupled to a similar (but pressureless) system of equations for the mass, momentum, and energy of the dust. These sets of equations are coupled via drag terms and heat transfer. A highresolution wave-propagation algorithm is used to solve the equations numerically. The one-dimensional algorithm ...

The space-time conservation element and solution element (CE/SE) method is used to solve the conservation law form of the compressible axisymmetric Navier-Stokes equations. The equations are time marched to predict the unsteady flow and the near-field screech tone noise issuing from an underexpanded circular jet. The CE/SE method uses an unstructured grid based data structure. The unstructured ...