Showing papers in "Ain Shams Engineering Journal in 2013"

TL;DR: In this paper, a mathematical model has been used to determine when to start cooling of the PV panels as the temperature of the panels reaches the maximum allowable temperature (MAT), which is a compromise temperature between the output energy from the solar panels and the energy needed for cooling.

TL;DR: In this paper, the design and performance analysis of differential evolution algorithm based Proportional Integral Time multiply Absolute Error (ITAE), damping ratio of dominant eigenvalues and settling time with appropriate weight coefficients are derived in order to increase the performance of the controller.

TL;DR: In this paper, the authors used the Casson fluid model to characterise the non-Newtonian fluid behaviour and employed similarity transformations to transform the governing partial differential equations into ordinary differential equations.

TL;DR: In this article, the boundary layer flow and heat transfer towards a porous exponential stretching sheet in presence of a magnetic field is presented in the analysis, where velocity slip and thermal slip are considered instead of no-slip conditions at the boundary.

TL;DR: In the proposed hybrid framework, the anomaly part is improved by replacing the k-means algorithm with another one called weighted k-Means algorithm, moreover, it uses a proposed method in choosing the anomalous clusters by injecting known attacks into uncertain connections data.

TL;DR: In this article, the axi-symmetric laminar boundary layer flow of a viscous incompressible fluid and heat transfer towards a stretching cylinder under the influence of a uniform magnetic field is considered.

TL;DR: The modified simple equation (MSE) method is thriving in finding exact traveling wave solutions of nonlinear evolution equations (NLEEs) in engineering and mathematical physics in this article.

TL;DR: In this article, the effect of air voids, degree of saturation, media of attack and the conditioning period on the performance of asphalt mixtures was evaluated to determine the resistance to moisture damage.

TL;DR: In this paper, the effects of grid and site parameters on voltage fluctuation are investigated, and a voltage regulation loop is developed to reduce flicker emission in wind power generation systems.

TL;DR: In this article, the exact solutions of nonlinear fractional Klein-Gordon equation, generalized Hirota-Satsuma coupled KdV system of time fractional order and Sharma-Tasso-Olever equation were established.

TL;DR: In this paper, an extensive laboratory program is conducted to study the feasibility of using recycled concrete aggregate (RCA) mixed with traditional limestone aggregate (LSA) which is currently being used in base or subbase applications in Egypt.

TL;DR: In this article, the boundary layer flow and heat transfer towards an exponentially stretching porous sheet embedded in a porous medium with variable surface heat flux was studied. But the authors did not consider the effect of temperature on the skin-friction coefficient.

TL;DR: In this paper, the heat transfer in unsteady boundary layer stagnation-point flow over a shrinking/stretching sheet is investigated, and the surface temperature of the sheet is taken time dependent.

TL;DR: In this article, the effects of Hall current and radiation absorption on MHD free convection mass transfer flow of a micropolar fluid in a rotating frame of reference were investigated.

TL;DR: In this article, the effect of quantity of steel slag on the mechanical properties of blended mixes with crushed limestone aggregates, which used as subbase material in Egypt, was evaluated and a theoretical analysis was employed to estimate the failure factors such as vertical deformations, vertical and radial stresses and vertical strains of subbase under overweight trucks loads.

TL;DR: In this paper, the effects of slip at the boundary on the mixed convective boundary layer flow over a flat plate are investigated, where similarity transformations are employed to transform the governing partial differential equations into ordinary ones, which are then solved numerically by shooting method.

TL;DR: In this article, a user friendly algorithm based on new homotopy perturbation transform method (HPTM) is proposed to solve nonlinear fractional Fornberg-Whitham equation in wave breaking.

TL;DR: In this paper, the thermal behavior of the brake discs of the vehicles using computing code ANSYS was analyzed using the thermal model of the braking system. But the authors did not consider the impact of braking parameters such as the type of braking, the geometric design of the disc and the used material.

TL;DR: In this paper, the combined effects of free convective heat and mass transfer on an unsteady MHD dusty viscoelastic (Walters liquid model-B) fluid flow between a vertical long wavy wall and a parallel flat wall saturated with porous medium subject to the convective boundary condition were studied.

TL;DR: In this article, the authors give the Frenet frames and Frenet invariants of timelike ruled surfaces and prove the Chasles Theorem for the same type of surfaces.

TL;DR: In this paper, the authors studied viscous fluid flow and heat transfer with second-order slip at linearly shrinking isothermal sheet in a quiescent medium, where the governing equations consisting of the continuity, momentum, and energy are transformed into a system of ordinary differential equations using suitable similarity transformation and solved numerically using the Runge-Kutta fourth-order method with the shooting technique.

TL;DR: The numerical solution of transient natural convection flow of radiation effects on MHD heat and mass transfer past a moving vertical cylinder with chemical reaction is presented in this article, where the governing boundary layer equations for the above flow problem of first-order homogeneous chemical reaction are setup and non-dimensionalized.

TL;DR: In this paper, a 40 cm-length circular heat pipe with screen mesh wick is experimentally investigated, which is made of copper with two diameters; larger in the evaporator and smaller in the adiabatic and condenser.

TL;DR: In this article, the authors argue that real estate developers use common grouping factors in their advertising, such as design, planning, and marketing principles, to re-shape people's desires and wants.

TL;DR: It is shown from three study cases that Petri nets fault diagnosis method has many merits such as accurate fault diagnosis results, easy and flexible correctness of Petri net fault diagnosis models for each item/section(s).

TL;DR: In this paper, the evaporation rate for Lake Nasser in Upper Egypt is estimated using the surface energy balance approach based on remote sensing technology, which is used to estimate the daily rate from the instantaneous one.

TL;DR: In this paper, the homotopy analysis method is applied to provide approximate solutions for linear and nonlinear two-point boundary value problems of fractional order, and the solution was calculated in the form of a convergent power series with easily computable components.

TL;DR: This paper introduces an SVPWM technique based on a reduced computation method, which is much simpler and more executable than conventional means without lookup tables or complex logical judgments.

TL;DR: In this paper, a parametric study is conducted using a three-dimensional finite element model that accounts for both geometrical and material non-linearities, and yield line analysis is used to propose equations for the endplate bending capacity.

TL;DR: In this paper, the thermal, mechanical and chemical properties of the sorghum stalks rind were investigated and the results showed that it is not recommended to subject the fibres to elevated temperatures (>200°C) for time periods exceeding 10 min.