A vertical open-ended channel filled with a porous medium, with an imposed heat flux and a heat loss coefficient on one of its walls, is studied numerically. A fan can enhance the self-driven flow, and therefore a mixed convection regime is considered. The objective is to maximize the overall...

The entropy generation in Lead–Bismuth Eutectic (LBE) turbulent flow in a cooled straight tube with a diameter of 10 mm and a length of 1 m is numerically investigated taking into account the temperature-dependent of LBE properties. The standard k-epsilon turbulence model combined with...

Nanofluids are considered to have great potential for heat transfer enhancement and are highly suited to application in practical heat transfer processes. Recently, several important studies were carried out to understand and explain the causes of the enhancement or control of heat transfer...

The current numerical study is conducted to analyze melting in a rectangular closed enclosure by subjecting the bottom wavy surface to a uniform temperature. The cavity vertical walls and the top wall are insulated while the bottom wall is maintained at temperature TB = 38.3 °C. The...

In this paper magnetohydrodynamic free convection flow of CuO–water nanofluid in a square enclosure with a rectangular heated body is investigated numerically using Lattice Boltzmann Method (LBM) scheme. The effective thermal conductivity and viscosity of nanofluid are calculated by KKL...

The heat transfer through a vertical stack of rectangular cavities filled with phase change materials (PCMs) is experimentally analysed in terms of both melting and solidification processes. This paper provides data that are useful for benchmarking and validation of numerical models that account...

Il lavoro analizza la filiera del trasporto aereo e mostra l'esistenza di una distribuzione asimmetrica del valore aggiunto tra compagnie aeree (caratterizzate da margini di profitto ridotti) e imprese che operano in altri stadi, quali le società di "leasing", i costruttori di motori per gli...

We analyze the air transportation vertical channel and show the existence of an asymmetric distribution of profit margins between airlines and the firms operating in upstream stages. Higher margins are observed for leasing companies, engine manufacturers and GDS, while airlines exhibit a very...

In this paper the findings are reported from an experimental study of the heat transfer and flow created between two vertical parallel walls heated from one side. In the laboratory a mock up of a facade provided with photovoltaic elements (PV) was built. Surface and air temperatures were...

We investigate the effects of downstream firms’ managerial incentives on upstream collusion. Downstream profit-and-revenue incentive schemes make upstream manufacturers easier to collude than a pure-profit incentive scheme does when retailers compete in prices. However, the opposite occurs...