Experimental investigation to study the heat transfer between a vertical round alumina-water nanofluid jet, and a horizontal circular round surface is carried out.  Different jet flow rates, jet nozzle diameters, various circular disk diameters and three nanoparticles concentrations (0, 6.6 and 10%) are used.  The experimental results indicate that using nanofluid as a heat transfer carrier can enhance the heat transfer process. For the same Reynolds number, the experimental data show an increase in the Nusselt numbers as the nanoparticles concentration increases.

Experimental investigation on natural convection heat transfer has been carried out inside vertical circular enclosures filled with Al2O3 nanofluid with different concentrations; 0.0%, 0.85% (0.21%), 1.98 (0.51%) and 2.95% (0.75%) by mass (volume).  Two enclosures are used with 0.20 m inside diameter and with two different aspect ratios.  The bottom surface of the enclosure is heated using a flexible heater while the upper surface was subject to cooling using an ambient air stream. Various uniform heat fluxes have been used to generate the natural convection heat transfer data.

Experimental investigation is made to study the heat transfer between a vertical round alumina (Al2O3) nanofluid jet and a horizontal heated circular disk.   Different jet flow rates, jet diameters, and nanoparticles concentration are used. Water is used as liquid reference in the current investigation since it is the base fluid of the used nanofluid. Two different nanoparticles concentration 6.6 and 10% by mass are used in the current investigation. The effect of nanoparticles concentration on the heat transfer is investigated by plotting Nusselt number versus the jet Reynolds number.

Experimental investigation on natural convection heat transfer has been carried out inside horizontal circular enclosures filled with Al2O3 nanofluid with different concentrations; 0.0%, 0.85% (0.21%), 1.98 (0.51%) and 2.95% (0.75%) by mass (volume).  Two enclosures are used with 0.20 m inside diameter and with two different aspect ratios.  The top surface of the enclosure is heated using a constant heat flux flexible foil heater while the bottom surface was subject to cooling using an ambient air stream.   Various heat fluxes have been used to generate the natural convection heat transfer

An experimental study is conducted to cool the ambient air using a new humidification technique. A wind tunnel is built with a test section formed by four modified MiniModule membrane contactors. An ambient air passes over the membrane contactors (cross flow) while water pumps through the contactors. Air temperature and relative humidity are measured upstream and downstream of the membrane contactors array which was used to humidify and cool the outdoor air.

Laminar natural convection heat transfer from torus is numerically investigated for two conditions; having isothermal surface or being uniformly heated.  Tori with different diameter ratios are examined under laminar conditions. The computational procedure is based on the finite volume technique.  Results are presented in the form of velocity and temperature contour plots around the perimeter of the torus. Heat transfer data are generated and presented in terms of the average Nusselt number versus Rayleigh or modified Rayleigh number.

An experimental study is conducted to cool the ambient air using a new humidification technique.  A wind tunnel is built with a test section formed by a matrix of ceramic tubes.

This paper proposes two types of stochastic correlation structures for Multivariate Stochastic Volatility models, such as the constant correlation (CC) and dynamic correlation (DC) models. Both structures can be used for purposes of determining optimal portfolio and risk diversification strategies through the use of correlation matrices for Islamic and emerging countries to forecast optimal capital charges.