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Heat Transfer Of Non-Newtonian Drag Reducing Flow In Porous Media, Mohamed Alaa Zahran
Heat Transfer Of Non-Newtonian Drag Reducing Flow In Porous Media, Mohamed Alaa Zahran
Journal of Engineering Research
Forced convection heat transfer for non-Newtonian drag reduction (polyethylene oxide) with heat flux is experimentally studied in a pipe filled with plastic spheres porous media. Along the pipeline, installing pumping stations is expensive; reducing the drag inside the pipe is better. The effect of PEO concentration on the heat transfer properties in the pipe is studied. The experiments are used to demonstrate the effect of changing Reynolds number and PEO concentrations on Nusselt number of the water and polymer solutions for different diameter ratios (d/D) and different concentrations. In the experiments, the test section is a circular pipe filled with …
Heat Transfer Of Non-Newtonian Drag Reducing Flow In Porous Media, Mohamed Alaa Zahran
Heat Transfer Of Non-Newtonian Drag Reducing Flow In Porous Media, Mohamed Alaa Zahran
Journal of Engineering Research
Forced convection heat transfer for non-Newtonian drag reduction (polyethylene oxide) with heat flux is experimentally studied in a pipe filled with plastic spheres porous media. Along the pipeline, installing pumping stations is expensive; reducing the drag inside the pipe is better. The effect of PEO concentration on the heat transfer properties in the pipe is studied. The experiments are used to demonstrate the effect of changing Reynolds number and PEO concentrations on Nusselt number of the water and polymer solutions for different diameter ratios (d/D) and different concentrations. In the experiments, the test section is a circular pipe filled with …
Experimental Investigation Of The Thermal-Hydraulic Performance Of Conically Coiled Tubes Using Al2o3/Water Nanofluid, Mohamed Abdelghany
Experimental Investigation Of The Thermal-Hydraulic Performance Of Conically Coiled Tubes Using Al2o3/Water Nanofluid, Mohamed Abdelghany
Journal of Engineering Research
The thermal-hydraulic performance of conically coiled tubes (CCTs) was investigated experimentally under constant heat flux boundary conditions in this study. The effect of several factors, such as the flow Dean number, coil torsion, and varied nanoparticle weight concentrations, on the flow's heat transfer coefficient and pressure drop was studied. Thermo-hydraulic performance was studied at 0.3%, 0.6%, and 0.9% volume concentrations (ϕ) of Al2O3/water nanofluid, a Dean number (De) of 1148–2983, and coil torsions (λ) ranging from 0.02 to 0.052. Results indicated that the heat transfer rates (HTRs) of CCTs increased when the coil torsion was decreased. According to the findings, …
The Growth Of Vapour Bubble Between Two-Phase Peristaltic Bubbly Flow Inside A Vertical Cylindrical Tube, S. A. Mohammadein, A. K. Abu-Nab
The Growth Of Vapour Bubble Between Two-Phase Peristaltic Bubbly Flow Inside A Vertical Cylindrical Tube, S. A. Mohammadein, A. K. Abu-Nab
International Journal of Thin Film Science and Technology
The behavior of vapour bubble in superheated liquid in a vertical cylindrical tube between two-phase flow densities is discussed under the effect of peristaltic motion of long wavelength and low Reynolds number. The mathematical model is formulated by mass, momentum, and heat equations. The problem solved analytically to estimate the growth of vapour bubbles, temperature and velocity distributions. The growth of vapour bubbles, temperature and velocity distribution proportional with the amplitude ratio, Grashof number, heat source parameter, volume rate, and inversely with density fraction. The present results of bubble growth performed lower values than that obtained by Mohammadein model (2001).
Numerical Modeling Of Heat And Mass Transfer With A Single-Phase Flow In A Porous Cavity, Mohamed F. El-Amin, Shereen Abdel-Naeem, Nehma A. Ebrahiem
Numerical Modeling Of Heat And Mass Transfer With A Single-Phase Flow In A Porous Cavity, Mohamed F. El-Amin, Shereen Abdel-Naeem, Nehma A. Ebrahiem
Applied Mathematics & Information Sciences
This work is intended to study the problem of heat and mass transfer with single-phase flow in a porous cavity. The model of this problem consists of the conservation laws of energy, momentum, and mass. The cavity boundaries are described by mixed Dirichlet-Neumann boundary conditions. The momentum equation which is represented by Darcy’s law has been solved with the continuity equation to give the pressure implicitly, then the velocity of the field has been calculated explicitly. Therefore, both energy equation and concentration equations are solved implicitly. The multiscale time-splitting implicit method has been used to treat the temporal discretization of …
Green’S Function Iterative Method For Solving A Class Of Boundary Value Problems Arising In Heat Transfer, Marwan Abukhaled
Green’S Function Iterative Method For Solving A Class Of Boundary Value Problems Arising In Heat Transfer, Marwan Abukhaled
Applied Mathematics & Information Sciences
In this study, a new algorithm based on Green’s function fixed point iterations is developed and implemented to solve a class of nonlinear boundary value problems that arise in heat transfer. The method will be employed to determine the efficiency of convective straight fins with temperature dependent thermal conductivity. The main idea of this method is to find an appropriate Green’s function that will be incorporated into a linear integral operator. By applying the fixed point theorem, an iterative formula for successive approximations will be obtained. Effectiveness and accuracy were noted when approximate results obtained by the proposed method reveal …