Using of nanofluids and ducts with corrugated walls are both supposed to enhance heat transfer, by increasing the heat transfer fluid conductivity and the heat transfer area respectively. Use of a diverging duct with a jet at inlet section may further increase heat transfer by creating recirculation zones inside the duct. In this work two-dimensional incompressible laminar flow of a nanofluid e...

the steady state effect of vertical fins is assessed on a photovoltaic/thermal solar air heater having a double pass configuration in which fins are placed in the lower channel perpendicular to the direction ofair flow. air passes through the upper channel of the air heater and before passing in the opposite direction through the lower channel. the effects of design, climatic and operating para...

We aim at predicting a complete and high-resolution depth map from incomplete, sparse and noisy depth measurements. Existing methods handle this problem either by exploiting various regularizations on the depth maps directly or resorting to learning based methods. When the corresponding color images are available, the correlation between the depth maps and the color images are used to improve t...

In this paper, a comprehensive study on the performance of parallel plate and rectangular micro channel counter flow heat exchangers is presented. The geometrical parameters of the two configurations are optimized for a given heat transfer rate, effectiveness and pressure drop. In case of rectangular micro channel counter flow heat exchanger, a reduced order model is developed first in which re...

Water cooling by ambient takes place with two mechanisms of heat and mass transfer. Using packings at wet cooling towers has disadvantages such as obstruction, reduction of life expectancy and production of algae and fungi. In shower cooling towers types of towers packings are completely removed and water intake is in direct contact and heat transfer takes place in two ways of latent and sensib...

This paper reports a novel technique for fabricating three-dimensional (3D) microfluidic channels in a single sheet of paper, which greatly simplifies the fabrication process of 3D microfluidic paper-based analytical devices (3D-μPADs). This technique, derived from the popular wax printing technique for paper channel patterning, is capable of controlling the penetration depth of wax upon heatin...

On the basis of the Manning equation and basic mass conservation principles, we derive an expression for scaling the steadystate width (W) of river channels as a function of discharge (Q), channel slope (S), roughness (n), and width-to-depth ratio (!): W " [!(! # 2)2/3]3/8Q3/8S$3/16n3/8. We propose that channel width-todepth ratio, in addition to roughness, is a function of the material in whic...