Khairy Elsayed
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View article: Enhancement of the thermoelectric generator performance by varying thermoelectric n/p couple spacing
Enhancement of the thermoelectric generator performance by varying thermoelectric n/p couple spacing Open
Enhancing the TEG performance by varying the n/p couple spacing ( S ) is studied at constant hot side temperature and heat flux boundary conditions. Thus, the values of S have varied in the range of 0.25 to 1.5 mm. Semiconductor materials,…
View article: Performance enhancement of gas cyclone with streamlined ports using CFD simulations
Performance enhancement of gas cyclone with streamlined ports using CFD simulations Open
Cyclones are extensively utilized as gas-solid separators in many industries such as pharmaceuticals, food processing, and powder handling often use mini cyclones for efficient dust collection, air filtration, and contaminant separation in…
View article: Effect of utilizing roughed surfaces within a curved microchannel having cavities on the thermo-hydraulic performance
Effect of utilizing roughed surfaces within a curved microchannel having cavities on the thermo-hydraulic performance Open
Curved microchannels with cavities have warranted significant interest from researchers due to their potential to improve the thermo-hydraulic performance of micro-scale hot components. However, there is a scarcity of information concernin…
View article: CFD Study of Novel Vortex Finder Pressure Drop Holes to Enhance Cyclone Separators Performance
CFD Study of Novel Vortex Finder Pressure Drop Holes to Enhance Cyclone Separators Performance Open
Gas cyclones are widely employed for the removal of dust and suspended particles from gases, but they encounter challenges related to pressure drop (ΔP) and separation efficiency (η Sep ). In addressing these issues, this study explores th…
View article: Design and Analysis of Gas Cyclone with Arc-Shaped Cone Using Bézier Curve for Improved Performance
Design and Analysis of Gas Cyclone with Arc-Shaped Cone Using Bézier Curve for Improved Performance Open
The research investigates novel gas cyclone separators with curved conical sections, comparing eight configurations with varying curvature sizes. Gas cyclones are traditionally used as particle separators to remove dust from gas streams, a…
View article: Investigating the modified thermoelectric generator system performance
Investigating the modified thermoelectric generator system performance Open
It is essential to enhance the performance of the thermoelectric generator as lower efficiencies are obtained recently. This could be achieved by changing its dimensions in addition to copper strip thickness. The present study is performed…
View article: Effect of Radiant Surface Combined with Displacement Ventilation in Office Building in Egypt
Effect of Radiant Surface Combined with Displacement Ventilation in Office Building in Egypt Open
In hot and humid climates, this paper describes a study to estimate the energy savings potential of a radiant system using simulation analysis.The medium size office buildings in Egypt used as a case study.To evaluate the thermal performan…
View article: Investigating the TEG system performance using single objective optimization genetic algorithm
Investigating the TEG system performance using single objective optimization genetic algorithm Open
Modifying the thermoelectric generator (TEG) by varying its dimensions along with copper strip thickness is essential to enhance performance. The current study is performed to determine the optimum dimensions of the P-N module and the inte…
View article: An Investigation of the Dependence of 3D Semi-Span Wing Behaviour on the Leading-edge Tubercles Configuration
An Investigation of the Dependence of 3D Semi-Span Wing Behaviour on the Leading-edge Tubercles Configuration Open
Inspired by nature, experiments on the aerodynamic behavior of wings and wind turbines with sinusoidal leading-edge continued over the last two decades.The studies showed promising results at post-stall flow regimes as tubercles cause a mo…
View article: Fluid flow and convection heat transfer in concentric and eccentric cylindrical annuli of different radii ratios for Taylor-Couette-Poiseuille flow
Fluid flow and convection heat transfer in concentric and eccentric cylindrical annuli of different radii ratios for Taylor-Couette-Poiseuille flow Open
This paper presents the results of fluid flow and convection heat transfer in concentric and eccentric annuli between two cylinders using a three-dimensional computational fluid dynamics model. Effects of rotational speed ( n = 0, 150, 300…
View article: Parametric study of a corrugated airfoil in a forward flight at ultra-low Reynolds number
Parametric study of a corrugated airfoil in a forward flight at ultra-low Reynolds number Open
In the current study, the mid cross section of the dragonfly forewing was simulated at ultra-low Reynolds number. The study aims to understand better the contribution of corrugations found along the wing on the aerodynamic performance duri…
View article: CFD STUDY OF THE EFFECT OF ADDITIONAL INNER BLADES ON SAVONIUS ROTOR PERFORMANCE
CFD STUDY OF THE EFFECT OF ADDITIONAL INNER BLADES ON SAVONIUS ROTOR PERFORMANCE Open
The effect of adding inner blades to the Savonius turbine deserves extensive attention due to its promising enhancement to its performance.A numerical study was carried out to investigate the effects of different radii and angles of additi…
View article: Simulation-Based Optimization of Smart Building Energy Using Artificial Neural Network
Simulation-Based Optimization of Smart Building Energy Using Artificial Neural Network Open
The present study aims to investigate the influence of the window size, the glazing properties and the shading overhang specifications on the energy consumption in smart buildings located in Alexandria, Egypt taking in account thermal and …
View article: Performance enhancement of an adsorption chiller by optimum cycle time allocation at different operating conditions
Performance enhancement of an adsorption chiller by optimum cycle time allocation at different operating conditions Open
This article aims to improve the system cooling capacity of an adsorption chiller working with a silica gel/water pair by an allocation of the optimum cycle time at different operating conditions. A mathematical model was established and v…
View article: Aerodynamic study of the corrugated airfoil at ultra-low Reynolds number
Aerodynamic study of the corrugated airfoil at ultra-low Reynolds number Open
In this study, Aeshna cyanea dragonfly forewing mid-cross-section corrugated airfoil was simulated at ultra-low Reynolds number. The corrugated airfoil was compared with its smooth counterpart to study the effect of the corrugations upon t…
View article: Numerical Study for Enhancement of Concentrator Photovoltaic (CPV) Cells Efficiency
Numerical Study for Enhancement of Concentrator Photovoltaic (CPV) Cells Efficiency Open
A study of thermal characteristics for uncooled CPV in addition to fluid flow and thermal characteristics for CPV integrated with a three dimensional (3D) rectangular shaped microchannel heat sink (MCHS) is numerically investigated.Steady …
View article: Studying the effect of vortex finder eccentricity on the gas cyclone performance
Studying the effect of vortex finder eccentricity on the gas cyclone performance Open
In this study, cyclone separator, with nine different vortex finder eccentricities are simulated computationally (CFD).The numerical technique is based upon solving three dimensional, incompressible, turbulent flow governing equations usin…
View article: ASSESSMENT OF AIR DIFFUSION PERFORMANCE INDEX IN A SURGICAL OPERATING ROOM BY COMPUTATIONAL FLUID DYNAMICS TECHNIQUE
ASSESSMENT OF AIR DIFFUSION PERFORMANCE INDEX IN A SURGICAL OPERATING ROOM BY COMPUTATIONAL FLUID DYNAMICS TECHNIQUE Open
Surgical operating room needs an efficient ventilation system to achieve thermal comfort and clean environment.This paper aims to improve the air distribution in the operating rooms with two operating tables configuration.Six test cases wi…
View article: Optimal Design of Orifice Flow Meter Using Computational Fluid Dynamics (CFD)
Optimal Design of Orifice Flow Meter Using Computational Fluid Dynamics (CFD) Open
Orifice flow meter constitutes one of the most common differential pressure flow meters.However, high energy loss is occurred with the measurement process.The present research considers 3 steady simulation using Reynolds Averaged Navier-St…
View article: Parametric Study of an Adsorption Refrigeration System Using Different Working Pairs
Parametric Study of an Adsorption Refrigeration System Using Different Working Pairs Open
Adsorption refrigeration system (ARS) is regarded as one of promising clean technologies since it uses a low-grade thermal energy (solar energy, waste heat, etc.). The present paper provides a dynamic modeling of two-bed ARS with RD silica…
View article: Pressure Loss Reduction in U-Bend Using the Adjoint Method
Pressure Loss Reduction in U-Bend Using the Adjoint Method Open
Gas turbine blades are usually cooled by air, which flows through internal passages serpentine shaped, coming from a high pressure compressor to save it from the high temperature.Using 180 degree turns to connect internal paths led to high…
View article: Effect of Eccentricity on Couette-Poiseuille Flow in Stationary and Rotating Annular Space of Different Radii Ratios
Effect of Eccentricity on Couette-Poiseuille Flow in Stationary and Rotating Annular Space of Different Radii Ratios Open
This paper presents the effects of eccentricity on fluid flow in small (less than 0.3), medium (0.3-0.6) and large (0.6-0.8) radii ratios.The Couette-Poiseuille flow, in concentric and eccentric annuli with a rotating inner pipe, is invest…
View article: Parametric Study of an Adsorption Refrigeration System Using Different Working Pairs
Parametric Study of an Adsorption Refrigeration System Using Different Working Pairs Open
Adsorption refrigeration system (ARS) is regarded as one of promising clean technologies since it uses a low-grade thermal energy (solar energy, waste heat, etc.). The present paper provides a dynamic modeling of two-bed ARS with RD silica…