November 2013

Homotopy analysis method with modified Reimann-Liouville derivative for space fractional diffusion equation

In this paper, we applied the homotopy analysis method (HAM) to construct the analytical solutions of the space fractional diffusion equations. The derivatives are defined in the Jumarie’s fractional derivative sense. The explicit solutions of the equations have been presented in the closed form by using initial conditions. Two typical examples have been discussed. The results reveal that the method is very...

Author(s): Jamshad Ahmad and Syed Tauseef Mohyud-Din

November 2013

Feasibility and technical studies of two water recirculating systems using two different power sources, solar photovoltaic and fuel generator

Recirculating water systems are designed to minimize or reduce dependence on water exchange and flushing in fish culture units. Water is typically recirculated when there is a specific need to minimize water replacement, to maintain water quality conditions which differ from the supply water, or to compensate for an insufficient water supply. In this work, recirculating system of fish was used in rearing fish which...

Author(s): Oparaku N. F. and Nnaji C. E.

November 2013

Optimization of the louver angle and louver pitch for a louver finned and tube heat exchanger

The optimization of the louver angle (θ) and the louver pitch (Lp) for a louver finned and tube heat exchanger was investigated numerically along with a simplified conjugate-gradient method (SCGM). The area reduction ratio relative to a plain surface is the objective function to be maximized. A search for the optimum louver angle (θ) and louver pitch (Lp), ranging from 15°< θ < 40° and 2...

Author(s): Jiin-Yuh Jang and Chun-Chung Chen