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In the present study, cooling of a hot elastic plate by using combined channel and jet impingement cooling is explored numerically by using finite element method. The operational parameters of the channel cooling system, such as flow rate, have an impact on the lower portion cooling because the distance between the elastic surface and the nozzle varies as a result of the object's deformation. The coupled interaction of different cooling systems have impacts on the thermal performance of the elastic plate. Channel flow Reynolds number (Rec between 300 and 1500), jet flow Reynolds number (Rej between 100 and 400), elasticity of the hot object (E between 1 0 5 and 1 0 8 ), vertical distance from the jet to the elastic plate (Hj between 5wj and 10wj; wj being the slot width), and the distance between slots in jet impingement cooling (sj between 3wj and 12wj) are all taken into consideration when conducting the numerical analysis. The upper and lower sections of the elastic plate's cooling performance are affected by the elasticity of the plate caused by the coupled system's fluid structure interaction in the jet flow domain. When Rec is increased to its maximum value, the average Nusselt number (Nu) increases by 38.5% and 42%, respectively, for elastic and stiff plates. When the maximum Rec is reached, the lower surface Nu increases by approximately 13.5%. At Rec = 1500, where the elasticity is at its maximum, the average Nu increment (decrement) for the upper (lower) section of the plate reaches 19%. When jet impingement cooling parameters are considered, the average Nu increases by roughly 35% and 33% for elastic plate and rigid plate arrangements while cooling performance of the upper plate portion increases by around 4.5% in the elastic case. As the vertical distance from the slot to the plate surface grows, the average Nu for the bottom part of the plate decreases, but the effect of the slot-slot distance on thermal performance is less sensitive. When the distance is raised to H=10wj, the average Nu for the elastic case reduces by roughly 15%, but for the rigid case, it decreases by 20% for the bottom part. With artificial neural network assisted computational fluid dynamics, an effective computational approach is proposed without using fluid–structure interaction. Accurate and fast results are obtained as compared to high fidelity 3D fully coupled computations. [ABSTRACT FROM AUTHOR]

An application of the Weakly compressible Smoothed Particle Hydrodynamics (WSPH) numerical method is presented here for the case of two-dimensional flow in a long channel with a partially open sluice gate. The results are compared with an analytical solution provided by shallow water equations (SWE) and available experimental data for instantaneous discharge depth at the gate. Of particular interest is the application of this numerical method to a sluice gate case with a high ratio of channel length to depth, which tends to amplify the effects of the chosen numerical resolution. General model congruence was within 5 % of a margin error even for relatively low vertical resolution, and some side effects of the equations used to describe the boundary conditions were identified. [ABSTRACT FROM AUTHOR]

Drag and lift forces are very important in engineering applications and, therefore, many research projects have been conducted to control these forces. In this paper, the effects of an upstream porous plate on the hydrodynamic forces over a square cylinder are investigated using lattice Boltzmann method. The main idea is to separate the obstacle from the upstream flow by adding such a porous plate, since the magnitudes of the drag and lift forces have a direct relationship with the phenomena of vortices shedding from the obstacle. In order to have a better insight into the problem, streamlines, vorticity contours and lift and drag coefficients are presented for different case studies. Results proved that the porous plate can reduce the drag and lift coefficients. Furthermore, increasing the height and the gap spacing (i.e., the surface-to-surface distance between the porous plate and the obstacle) could significantly affect the flow field characteristics and the forces acting on the obstacle. [ABSTRACT FROM AUTHOR]

Purpose The paper aims to focus on modeling of combined mixed convection and volumetric radiation within a vertical channel using a hybrid thermal lattice Boltzmann method (LBM). The multiple relaxation time LBM (MRT-LBM) is used to compute the dynamical field. The thermal field is determined by a finite difference method (FDM), and the simple relaxation time-LBM (SRT-LBM) serves to calculate the radiative part. The geometry considered concerns a vertical channel defined by two diffuse and isothermal walls. The active fluid represents a gray gas participating in absorption, emission and isotropically scattering. The parametrical study conducted aims to highlight the effect of Richardson number (Ri), Planck number (Pl) and the optical thickness (τ) on dynamical and thermal fields. It is found that radiation affects greatly heat transfer.Design/methodology/approach MRT-LBM is used to compute the dynamical field. The thermal field is determined by FDM, and SRT-LBM serves to calculate the radiative part.Findings This study has shown the strong capability of this approach to simulate similar problems. The Planck number largely affects the streamlines and isotherms distribution. Also, it causes disappearance of reversal flow, undesirable in most industrial applications, for low Planck numbers. The optical thickness causes the disappearance of reversal flow, in the case in which it appears, for lower opacity. However, for higher opacity it leads to a recurrence of reversed flow.Originality/value The use of a new original method composed of MRT-LBM to solve the fluid velocity, FDM to handle the temperature equation and extended SRT-LBM to compute the radiative part of the energy equation. [ABSTRACT FROM AUTHOR]

New Ethernet standards are under development, which provide two to five times higher data rates than the original Ethernet data rates, while operating over the prior generation of standard unshielded twisted pair cabling. The primary purpose is to gain full utilization of the installed base of Category 5e and Category 6 structured cabling. The 10GBASE-T Ethernet technology, originally specified for operating at lOGb/s over 100m of Category 6A cabling, has been adapted to operate at 2.5Gb/s over Category 5e cabling and 5Gb/s over Category 6 cabling. Although the existing Category 5e and Category 6 cabling standards cannot be changed, actual cabling can be requalified for the new higher data-rates by re-evaluating certain transmission parameters. The requalification guidelines use practical techniques to determine the effective data capacity of a particular channel. The use of these techniques implies the means to determine the potential rate, reach and margin for any cabling channel implementation. [ABSTRACT FROM AUTHOR]

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Purpose – The purpose of this paper is to examine the turbulent fluid flow and heat transfer characteristics for rectangular channel provided with solid plate baffles which are arranged on the bottom and top channel walls in a periodically staggered way. Design/methodology/approach – The turbulent governing equations are solved by a finite volume method with the second-order up winding scheme and the k-ώ turbulence model to describe the turbulent structure. The velocity and pressure terms of momentum equations are solved by SIMPLE (semi-implicit method for pressure-linked equation) algorithm. The parameters studied include the entrance Reynolds number Re (5.103-2.104), the baffles height are fixed at (h=0.08 m); whereas three different baffle spacing were considered S1 = D, S2 = D/2 and S3=3D/2 and the working medium is air. Findings – In this work, it is found that vortex shedding generated by the baffle on the upper wall can additionally enhance heat transfer along the baffle surfaces. The wavy flow significantly changes the recirculating zone behind the last baffle. Finally, changing the baffles spacing seemed to reduce to changing the heat transfer surface between the solid and the fluid in the sense that higher heat transfer is obtained for lower spacing between baffles. Originality/value – The results of the numerical calculations of the flow field indicate that the flow patterns around the solid baffles depending on the spacing of the baffles and it significantly influences the local heat transfer coefficient distributions. The problem is inversely proportional for the friction factor. [ABSTRACT FROM AUTHOR]

Highlights: [•] We simulate combined convection in an open channel with a square cavity which has a partially or fully heated on left side. [•] We examine heat transfer for different Rayleigh numbers and magnetic parameter. [•] Flow strength and heat transfer increase with Rayleigh number for both cases. [•] Magnetic field is a control parameter for heat transfer and fluid flow in open ended channel flow with cavity. [Copyright &y& Elsevier]

During the last decade, several quantum information protocols, such as quantum key distribution, teleportation or quantum computation, have attracted a lot of interest. Despite the recent success and research efforts in quantum information processing, however, we are just at the beginning of understanding the role of entanglement and the behavior of quantum systems in noisy environments, i.e. for nonideal implementations. Therefore, in order to facilitate the investigation of entanglement and decoherence in n-qubit quantum registers, here we present a revised version of the Feynman program for working with quantum operations and their associated (Jamiołkowski) dual states. Based on the implementation of several popular decoherence models, we provide tools especially for the quantitative analysis of quantum operations. Apart from the implementation of different noise models, the current program extension may help investigate the fragility of many quantum states, one of the main obstacles in realizing quantum information protocols today. [Copyright &y& Elsevier]

NEW-PRODUCT NEWS: In a wide-ranging announcement, IBM said it will introduce support for the industry standard Container Storage Interface (CSI) in the second quarter. There was other news, too. [ABSTRACT FROM AUTHOR]

MediaMath has announced a partnership with Place Exchange to deliver the industry's first out-of-home (OOH) programmatic omnichannel campaigns. [ABSTRACT FROM AUTHOR]

COLUMBIA TRISTAR International Television and UK broadcaster Channel 5 have embarked on a unique means of funding movie rights. According to Channel 5, industrial giant Unilever has paid CTIT $10 [...]

Europe's first youth-oriented Christian satellite station, Channel 7, launched Sept 3. The English-language service, which includes drama, animation and music with a Christian theme, transmits Via Eutelsat satellite daily from [...]

FiberLight, the fibre connectivity solutions provider, has appointed Mike Kopp as its new vice president of channel. [ABSTRACT FROM AUTHOR]

Presents a study from China describing a molecular analysis of phosphatidylinositol 4,5-biphosphonate regulation of HERG gene. Performance of mutation; Result of stimulating alpha-adrenergic receptors; Determination of a polarizing shift in the voltage dependence consumption that alters potassium channel activity.

Asia-Pacific infrastructure provider Superloop has agreed to acquire Australia-based APEXnetworks (APEXN) for $5.8 million. [ABSTRACT FROM AUTHOR]

The tech giant is reportedly eyeing a 25-channel package by September. [ABSTRACT FROM PUBLISHER]

The French subsidiary of next-generation networks and IP communications firm Italtel has been awarded premier certification from Cisco. [ABSTRACT FROM AUTHOR]

British operators Vodafone and EE are close to signing a deal with Eurotunnel, which will enable the use of mobile phones and tablets under the sea during the Channel tunnel crossing, the Financial Times reports. [ABSTRACT FROM AUTHOR]

Communications and technology solutions provider Windstream is deploying Infinera's optical equipment to build a national long-haul network across the US. [ABSTRACT FROM AUTHOR]