the performance of a γ-al 2 o 3 /n-decane nanofluid shell-and-tube heat exchanger in a biomass heating plant is analyzed to specify the optimum condition based on the maximum heat transfer rate and performance index for wide range of nanoparticle volume fraction (0–7%). compared with pure          n-decane, the obtained results in this research show that by using γ-al 2 o 3 /n-decane nanofluid ...

a numerical investigation of laminar mixed convection heat transfer in a shallow two-sided lid driven rectangular enclosure of aspect ratio 5, (ar=5) is executed. the natural convection effect is sustained by subjecting the bottom wall to a higher temperature than its top counterpart. in addition, the two horizontal walls of the enclosure are moving in different directions and the two vertical ...

An isothermal endoreversible chemical engine operating between a finite high-chemicalpotential reservoir and an infinite low-chemicalpotential reservoir in which the mass transfer between the working fluid and the mass reservoirs obeys the linear mass-transfer law [g ∝ ∆μ], is put forward in this paper. Optimal control theory is applied to determine the optimal cycle configuration corresponding...

Background Every health professional around the world is at risk of blood/body fluid exposure and needle stick/sharp injury as a result of exposure to blood or body fluids and needle or sharp injuries. However, the extent of these hazards and their driving forces are not well documented in Ethiopia. Thus, the aim of this study was to assess determinants of blood/body fluid exposure and needle s...

BACKGROUND Fluid therapy in children may be associated with iatrogenic hyponatraemia. We surveyed anaesthetists' current fluid prescribing practice during the perioperative period, departmental fluid protocols and awareness of the concerns of the Royal College of Paediatrics and Child Health (RCPCH) about the use of dextrose 4%/saline 0.18% in children. METHODS Questionnaire survey of 477 con...

in this paper, fluid flow between two parallel flat plates that are partially filled with two-dimension porous media is investigated numerically using single relaxation time (srt) lattice boltzmann method (lbm) at pore scale. the considered obstacles are random, circular, rigid and granular with uniform diameters. single component and single-phase viscous newtonian fluid are considered as worki...

Article history: Received 8 May 2013 Received in revised form 26 June 2013 Accepted 8 July 2013 Available online 8 August 2013 Although fluid intelligence and complex learning are conceptualized differently and assessed by apparently different measures, both theoretical accounts and empirical evidence suggest a relationship between the two constructs. In this study, major working memory aspects...

A modeling approach of HDM based mixed finite element formulation of hydrostatic fluid-structure interaction is introduced. Fluid transfer analysis of mass flow rate versus pressure difference through fluid track between two chambers is carried out. The finite element models of upper and lower chambers are bridged through the fluid transfer analysis. Static working process of a typical HDM with...

This paper aims at explaining how intermediaries influence collaborative innovation projects, suggesting a conceptual-theoretical framework about intermediaries’ roles and practices. The qualitative research was developed through the case study of the Orange Service Call and Reward project performed by the National Endowment for Science, Technology and the Arts (NESTA) for Orange Labs, the R&D ...

The aim of this study is to find the optimal water pressure and percentage of supply vapour in the feed water heaters (fwhs) of steam power plants, such that they maximize the thermal efficiency of the Rankine cycle within pre-specified values of minimum and maximum pressures of the thermodynamic cycle. Thermal efficiency is defined as a function of unknown variables (fluid pressure and vap...