The mixing characteristics of coolant air jets with the hot gas exiting the gas turbine combustor’s primary zone is of major importance to the combustor exit temperature profile. In the present work, a three dimensional numerical simulation on the basis of the finite volume method was developed. The aim was to investigate the penetration and mixing characteristics of directly opposed rows of co...

Recent technological developments have lead to significant increase in the generated heat by electronic and optical components. The removal of high heat fluxes can be successfully treated by several methods, e.g. impinging jets. Further improvement is offered by incorporating arrays of jets or causing jets to pulsate. The research reported herein introduces a new method which is based on actuat...

Two- and three-dimensional MHD simulations are used to provide a theoretical description of 2 wire molybdenum X-pinch experiments. The initial evolution from solid wires to the formation of supersonic jets and a central micro-Z pinch is found to result from the slow rate of wire ablation and from the distribution of the Lorentz force. The growth of m=0 instabilities triggers the formation of mi...

This paper reports on a microfluidic device with high spatiotemporal control used as an in vitro model of neuromuscular junction (NMJ) developmental biology. The device is assembled using three poly(dimethylsiloxane) (PDMS) layers and consists of micro-trenches for long-term culture of myotubes and an array of 32 identical focal stimulation jets to stimulate the myotubes. The device operates in...

The Global mm–VLBI Array is at present the most sensitive 3mm–VLBI interferometer and provides images of up to 40 micro–arcsecond resolution. Using this array, we have monitored the rotation of the innermost jet in the quasar NRAO150, which shows an angular speed of ∼ 7◦/yr. Future 3mm arrays could include additional stations like ALMA, GBT, LMT, CARMA, SRT, Yebes, Nobeyama and Noto, which woul...

VLBI at millimeter wavelengths (mm-VLBI) allows the detailed imaging of compact galactic and extragalactic radio sources with micro-arcsecond scale resolution, unaccessible by other observing techniques. Here we discuss the scientific potential of mm-VLBI for present and future research on 'Active Galactic Nuclei' (AGN) and their powerful relativistic jets. With the new generation of large radi...

we present observation of polar coronal hole plumes with foot point jets that shows evidence of longitudinal acceleration. the series of event, occurring in the north coronal hole on 10 july 2010, was observed by the aia telescopes of the solar dynamic observatory (sdo mission) in the euv lines, with unprecedented details. the structures along the plume show a propagating outward velocity of ab...

in this study, confined impinging liquid jets are used to produce nanoparticles of carbamazepine (cbz). the effect of operating parameters, such as the kind of solvent,cbz concentration, flow rate of solution and antisolvent on particle size, are experimentally investigated. the scanning electron micrograph (sem) photomicrographs show that nanodrug with smaller particle is achievable by using s...

Ammonia has a very wide range of applications. Its worldwide production exceeds 230 million tonnes per year. Due to its properties, ammonia causes serious threat human life and health when released uncontrolled into the environment. Research carried out in word shows that this substance may be effectively neutralised by absorption water. The aim research described paper is determine influence k...

Preliminary and published results obtained by the DØ Collaboration on the top quark pair production cross-section in p ¯ p collisions at a center-of-mass energy of ¡ s ¢ 1£ 96 TeV are presented. The measurements are obtained using the lepton+jets final states with two methods : in the first one, signal is discriminated from background using event kinematics and in the other method signal events...