Papers by Fateh Mebarek-Oudina
Frontiers in Heat and Mass Transfer, 2024
In this work, a steady mixed convection in a two-dimensional enclosure filled viananoliquid Cu/H2... more In this work, a steady mixed convection in a two-dimensional enclosure filled viananoliquid Cu/H2O through a porous medium was numerically analyzed. The nanoliquid flow is designated utilizing the Brinkman-Forchheimer model. The upper and the bottom horizontal walls are considered to be hot (Th) and cold temperature (Tc), respectively, whereas the other walls are thermally insulated. The impact of various dimensionless terms such as the Grashof number (Gr) in the ranges (0.01-20), the Reynolds number (Re) in the ranges (50-500), the Hartman number (Ha) in the ranges (0-20), and three different location cases (0.25, 0.5, and 0.75) are carefully analyzed. The obtained outcomes are established in the form of isotherms, streamlines, and the average Nusselt number. It has been found that heat transport increases significantly through rising Reynolds number (Re). For the location cases L = 0.25, Re = 50, and Gr = 10 5 , the heat transfer is maximum.
Frontiers in Heat and Mass Transfer, 2024
The goal of this paper is to represent a numerical study of magnetohydrodynamic mixed convection ... more The goal of this paper is to represent a numerical study of magnetohydrodynamic mixed convection heat transfer in a lid-driven vertical wavy enclosure with a fin attached to the bottom wall. We use a finite element method based on Galerkin weighted residual (GWR) techniques to set up the appropriate governing equations for the present flow model. We have conducted a parametric investigation to examine the impact of Hartmann and Richardson numbers on the flow pattern and heat transmission features inside a wavy cavity. We graphically represent the numerical results, such as isotherms, streamlines, velocity profiles, local and mean Nusselt numbers, and average surface temperature. Comparisons between the results of this work and previously published work in a literature review have been produced to examine the reliability and consistency of the data. The different sizes of the fin surface significantly impact flow creation and temperature fields. Additionally, the long fin size is necessary to enhance the heat transfer rate on the right surface at large Richardson numbers and low Hartmann numbers. Fin surfaces can significantly increase the mixing of fluid inside the enclosure, which can mean reductions in reaction times and operating costs, along with increases in heat transfer and efficiency.
Heat Transfer, 2024
Heat exchanger research is mainly exploited to develop and optimiseoptimize new engineering syste... more Heat exchanger research is mainly exploited to develop and optimiseoptimize new engineering systems with high thermal efficiency. Passive methods based on nanofluids, fins, wavy walls, and the porous medium are actually the most attractive ways to achieve this goal.This investigation focuses on heat transferand entropy production in a nanofluid laminar flow inside a plate corrugated channel (PCC).The channel geometry comprises three sections, partially filled with a porous layer located at the intermediate corrugate channel section.The physical modeling is based on the laminar, two-dimensional Darcy–Brinkman–Forchheimer formulation for nanofluid flow and the local thermal equilibrium model for the heat equation, includingthe viscous dissipation term. Numerical solutions arewere obtained using ANSYS Fluent software based on the finite volume technique and the appropriate meshed geometries.The numerical results are validated with theoretical, numerical, and experimental studies. The simulations are performed for CuO–water nanofluid and AISI 304 porous medium. The coupled effects of porous layer thickness (δ), Reynolds number (Re), and nanoparticle fraction (φ) on velocity, streamlines, isotherm contours, Nusselt number (Nu), and entropy generation (S) are analyzed and illustrated. The simulation results demonstrate that heat transfer enhancement in clear PCC can be achieved using a porous layer insert. For the porous thickness range of [0.1–0.6], the corresponding range of average Nusselt number increase is [35.7%–176.9%], and the average entropy generation is [105.4%–771.9%]. The effect of the Reynolds number is more important in a porous duct than in aclear one. For δ = 0.4 and φ = 5%, the increase of Rein the range of [200–500] induces an increase ofin average Nusselt number in the range of [80.9%–108.4%] and average entropy in [222.9%–309.1%] comparatively to clear PCC.The effect of φ is practically the same for porous and clear channels. For φ = 5%, the increase inon average Nu is about 9%,and entropy generation is 5%. Accordingly, important improvements in heat transfer in PCC can be achieved through the combined effect of flow Reynolds numberand porous layer thickness.
Frontiers in Heat and Mass Transfer , 2024
The primary aim of this research endeavor is to examine the characteristics of magnetohydrodynami... more The primary aim of this research endeavor is to examine the characteristics of magnetohydrodynamic Williamson nanofluid flow past a nonlinear stretching surface that is immersed in a permeable medium. In the current analysis, the impacts of Soret and Dufour (cross-diffusion effects) have been attentively taken into consideration. Using appropriate similarity variable transformations, the governing nonlinear partial differential equations were altered into nonlinear ordinary differential equations and then solved numerically using the Runge Kutta Fehlberg-45 method along with the shooting technique. Numerical simulations were then perceived to show the consequence of various physical parameters on the plots of velocity, temperature, and concentration of the nanofluid flow. Boosting the magnetic, Williamson, porosity, and stretching sheet index parameters, the velocity of the fluid flow decreases. The temperature is enhanced as the Williamson and Brownian motion parameters upsurge, but it decreases as the Prandtl, thermophoresis, stretching sheet index, and Dufour parameters escalate. The concentration distribution decreases as the thermophoresis and magnetic parameters upsurge, but it escalates as the Soret, Schmidt, Brownian motion, and stretching sheet index parameters increase. Skin friction coefficient boosted as the stretching sheet index and magnetic parameters enhanced against the Williamson parameter. The findings from this study have been contrasted with earlier findings on local Nusselt numbers, which show substantial support and endorse the existing approach’s validity. The numerical values of the local Sherwood number gradually increase as the Schmidt, Soret, stretching sheet index, and thermophoresis parameters are upsurged.
Frontiers in Heat and Mass Transfer, 2024
This investigation aims to analyze the effects of heat transport characteristics in the unsteady ... more This investigation aims to analyze the effects of heat transport characteristics in the unsteady flow of nanofluids over a moving plate caused by a moving slot factor. The BRS variable is utilized for the purpose of analyzing these characteristics. The process of mathematical computation involves converting the governing partial differential equations into ordinary differential equations that have suitable similarity components. The Keller-Box technique is employed to solve the ordinary differential equations (ODEs) and derive the corresponding mathematical outcomes. Figures and tables present the relationship between growth characteristics and various parameters such as temperature, velocity, skin friction coefficient, concentration, Sherwood number, and Nusselt number. The results are assessed by comparing them to previous findings. The observation reveals that higher dimensionless reference temperature and variable values of the moving slot parameter have a suppressing effect on the velocity and temperature patterns of nanofluids. Higher values of the dimensionless reference temperature and moving slot parameter lead to enhancements in the Sherwood number, skin friction coefficient, and Nusselt number. The conductivity of the nanofluid is ultimately affected by these enhancements.
International Journal of Numerical Methods for Heat & Fluid Flow, 2024
Purpose-This paper aims to present a numerical study that investigates the flow of MgO-Al 2 O 3 /... more Purpose-This paper aims to present a numerical study that investigates the flow of MgO-Al 2 O 3 /water hybrid nanofluid inside a porous elliptical-shaped cavity, in which we aim to examine the performance of this thermal system when exposed to a magnetic field via heat transfer features and entropy generation. Design/methodology/approach-The configuration consists of the hybrid nanofluid out layered by a cold ellipse while it surrounds a non-square heated obstacle; the thermal structure is under the influence of a horizontal magnetic field. This problem is implemented in COMSOL multiphysics, which solves the related equations described by the "Darcy-Forchheimer-Brinkman" model through the finite element method. Findings-The results illustrated as streamlines, isotherms and average Nusselt number, along with the entropy production, are given as functions of: the volume fraction, and shape factor to assess the behaviour of the properties of the nanoparticles. Darcy number and porosity to designate the impact of the porous features of the enclosure, and finally the strength of the magnetic induction described as Hartmann number. The outcomes show the increased pattern of the thermal and dynamical behaviour of the hybrid nanofluid when augmenting the concentration, shape factor, porosity and Darcy number; however, it also engenders increased formations of irreversibilities in the system that were revealed to enhance with the permeability and the great properties of the nanofluid. Nevertheless, this thermal enhanced pattern is shown to degrade with strong Hartmann values, which also reduced both thermal and viscous entropies. Therefore, it is advised to minimize the magnetic influence to promote better heat exchange. Originality/value-The investigation of irreversibilities in nanofluids heat transfer is an important topic of research with practical implications for the design and optimization of heat transfer systems. The study's findings can help improve the performance and efficiency of these systems, as well as contribute to the development of sustainable energy technologies. The study also offers an intriguing approach that evaluates entropy growth in this unusual configuration with several parameters, which has the potential to transform our understanding of complicated fluid dynamics and thermodynamic processes, and at the end obtain the best thermal configuration possible.
Journal of Nanofluids
The problem of non-Newtonian fluid flow has taken considerable interest and has been the subject ... more The problem of non-Newtonian fluid flow has taken considerable interest and has been the subject of several work in latest years due to its various requests in different fields of engineering, in particular the interest in the problems of heat transfer in non-Newtonian liquids, such as lubrication, hot rolling, cooling problem and drag reduction. Here, mixed convection heat transport and its related entropy production in a porous channel with circular obstacle saturated via non-Newtonian power law liquid has been scrutinized. The influences on entropy production of the power law index, the Reynolds number, the Rayleigh number and the Darcy number are investigated. Being a novelty of this work, an optimization study of the thermodynamic irreversibility as a function of the channel inclination angle and the power law index is undertaken. The governing equations of the problem are solved employing the COMSOL software. Outcomes illustrate that the governing parameters strongly affect th...
Journal of Scientific Research
Wave Motion, 2023
An improved collocation technique has been proposed to discretize the fourth-order multi-paramete... more An improved collocation technique has been proposed to discretize the fourth-order multi-parameter non-linear Kuramoto -Sivashinsky (K-S) equation. The spatial direction has been discretized with quintic Hermite splines, whereas the temporal direction has been discretized with a weighted finite difference scheme. The fourth-order equation in space direction has been decomposed into second-order using space splitting by introducing a new variable. Space splitting has been proposed to improve the convergence of the approximate solution. The proposed equation has been analyzed on a uniform grid in both space and time directions. Error bounds for general order Hermite splines are established for fully discrete scheme. Stability analysis for the proposed scheme has also been discussed elaborately. Periodic and non periodic problems of K-S equation type have been discussed to study the technique.
An improved collocation technique has been proposed to discretize the fourth-order multi-paramete... more An improved collocation technique has been proposed to discretize the fourth-order multi-parameter non-linear Kuramoto-Sivashinsky (K-S) equation. The spatial direction has been discretized with quintic Hermite splines, whereas the temporal direction has been discretized with a weighted finite difference scheme. The fourth-order equation in space direction has been decomposed into second-order using space splitting by introducing a new variable. Space splitting has been proposed to improve the convergence of the approximate solution. The proposed equation has been analyzed on a uniform grid in both space and time directions. Error bounds for general order Hermite splines are established for fully discrete scheme. Stability analysis for the proposed scheme has also been discussed elaborately. Periodic and non periodic problems of K-S equation type have been discussed to study the technique. The error growth has been addressed by computing L 2 − norm and L ∞ − norm.
Energy and Built Environment, 2023
The study is focused on the use of nanofluids in a micro-open tall cavity, which is a type of mic... more The study is focused on the use of nanofluids in a micro-open tall cavity, which is a type of micro heat exchanger (MHE). The cavity is heated from the bottom sidewall in a sinusoidal pattern, and the effects of four input parameters (Ra, Ha, Kn, and Vf) on heat transfer and irreversibility are investigated using numerical simulations based on Lattice Boltzmann Method (LBM). The findings of the study suggest that the local heat transfer on the bottom sidewall is strongly influenced by Ra and Ha, while the surface distribution of entropy generation is mainly dependent on Kn. The study also shows that the optimization of the magnitude and wavelength of the sinusoidal temperature can improve both local heat transfer and surface distribution of entropy generation. The results of the study provide valuable insights into the design of micro heat exchangers and suggest that the optimization of micro-porous geometries using DOE could lead to increased energy efficiency. The study contributes to our understanding of the complex interactions between input parameters in micro heat exchangers and highlights the importance of considering multiple parameters in the design process.
Journal of Nanofluids, 2023
The problem of non-Newtonian fluid flow has taken considerable interest and has been the subject ... more The problem of non-Newtonian fluid flow has taken considerable interest and has been the subject of several work in latest years due to its various requests in different fields of engineering, in particular the interest in the problems of heat transfer in non-Newtonian liquids, such as lubrication, hot rolling, cooling problem and drag reduction. Here, mixed convection heat transport and its related entropy production in a porous channel with circular obstacle saturated via non-Newtonian power law liquid has been scrutinized. The influences on entropy production of the power law index, the Reynolds number, the Rayleigh number and the Darcy number are investigated. Being a novelty of this work, an optimization study of the thermodynamic irreversibility as a function of the channel inclination angle and the power law index is undertaken. The governing equations of the problem are solved employing the COMSOL software. Outcomes illustrate that the governing parameters strongly affect the entropy production. The thermal entropy generation is maximal at low value of power law index and high value of Reynolds number. The effect of Reynolds number become insignificant at relatively high power law index. At fixed Reynolds number value, a rise in the power index (n) leads to a reduce in the thermal entropy. This decrease is tiny, at low value of Reynolds number (Re) and turn into increasingly considerable as Re rises. The streamlines show the existence of two recirculation zones just after the circular obstacle, whose existence depends on both Re and power law index. Results show that the greatest variation relating to the inclination angle is for power law index equal to 0.4. Results indicate also that, at low Darcy number and relatively high power law index, the intrinsic effect of the modified Darcy number on Darcy viscous irreversibility become pronounced giving a sharp increase in the total entropy production.
International Journal of Modern Physics B
This paper examines the impacts of a nonlinearly expanding sheet on velocity, heat and mass trans... more This paper examines the impacts of a nonlinearly expanding sheet on velocity, heat and mass transport for a Suttery hybrid nanoliquid (mixture of Sutterby fluid and [Formula: see text] and [Formula: see text]. The zero-mass flux concentration and convective boundary conditions are considered. Nondimensionalization of governing equations may be achieved through similarity conversions. The governing equations are solved utilizing the Optimal Homotopy Analysis Method. Graphs and tables were used to document the effects of different variables. The numerical values for skin friction, Sherwood number and Nusselt number are provided in a table for diverse relevant factors. Comparisons were made to a previous study’s findings. The results obtained are in agreement with the findings of the prior study. The outcome is that the occurrence of hybrid nanoparticles ([Formula: see text] and [Formula: see text] in ethylene glycol liquid enhances its thermal conductivity thereby increasing the therm...
Micromachines, 2023
The high demand for compact heat exchangers has led researchers to develop high-quality and energ... more The high demand for compact heat exchangers has led researchers to develop high-quality and energy-efficient heat exchangers at a lower cost than conventional ones. To address this requirement , the present study focuses on improvements to the tube/shell heat exchanger to maximize the efficiency either by altering the tube's geometrical shape and/or by adding nanoparticles in its heat transfer fluid. Water-based Al 2 O 3-MWCNT hybrid nanofluid is utilized here as a heat transfer fluid. The fluid flows at a high temperature and constant velocity, and the tubes are maintained at a low temperature with various shapes of the tube. The involved transport equations are solved numerically by the finite-element-based computing tool. The results are presented using the streamlines , isotherms, entropy generation contours, and Nusselt number profiles for various nanoparticles volume fraction 0.01 ≤ ϕ ≤ 0.04 and Reynolds numbers 2400 ≤ Re ≤ 2700 for the different shaped tubes of the heat exchanger. The results indicate that the heat exchange rate is a growing function of the increasing nanoparticle concentration and velocity of the heat transfer fluid. The diamond-shaped tubes show a better geometric shape for obtaining the superior heat transfer of the heat exchanger. Heat transfer is further enhanced by using the hybrid nanofluid, and the enhancement goes up to 103.07% with a particle concentration of 2%. The corresponding entropy generation is also minimal with the diamond-shaped tubes. The outcome of the study is very significant in the industrial field and can solve many heat transfer problems
International Journal of Modern Physics B
The hydromagnetic flow of magnetite–water nanofluid due to a rotating stretchable disk has been n... more The hydromagnetic flow of magnetite–water nanofluid due to a rotating stretchable disk has been numerically assessed. The nanofluid flow has been modeled utilizing the adapted Buongiorno model that considers the volume fraction-dependent effective nanofluid properties and the major slip mechanisms. In addition, experimentally gleaned functions of effective dynamic viscosity and effective thermal conductivity are deployed. The modeled equations are transformed into a first-order ODEs scheme employing Von Kármán’s similarity conversions and then resolved via the Runge–Kutta algorithm through the shooting technique. The impact of pertinent terms over the physical quantities, nanoliquid temperature and nanoliquid concentration is explained with the support of graphs. Results show that rising volume fraction of magnetite nanoparticles (NPs) and magnetic field term enhance the drag force. Mass transport rate is demoted with augmenting values of magnetic field parameter whereas is promoted...
Energies
Phase change materials (PCMs) proved to be valuable and drew the attention of numerous scientists... more Phase change materials (PCMs) proved to be valuable and drew the attention of numerous scientists striving to establish novel techniques to minimize energy consumption and expand heat storage; yet a number of challenges hampered their research. This paper provides an overall overview on how to overcome those constraints by adapting nano-enhanced phase change materials, the motivation behind their investigation, their advantages, area of applications, and their impact on thermal management and storage equipment. Recent computational and experimental studies have revealed that nanoparticles are extremely useful in terms of improving the thermo-physical properties of PCMs, allowing nano-PCMs, mainly nano-paraffin, to have a major positive influence on thermal concepts at the economical, ecological, and effectiveness levels. In this context, nano-enhanced PCMs are now able to store and release large amounts of heat in short intervals of time, which is relevant to thermal storage systems...
Energies, 2023
Phase change materials (PCMs) proved to be valuable and drew the attention of numerous scientists... more Phase change materials (PCMs) proved to be valuable and drew the attention of numerous scientists striving to establish novel techniques to minimize energy consumption and expand heat storage; yet a number of challenges hampered their research. This paper provides an overall overview on how to overcome those constraints by adapting nano-enhanced phase change materials, the motivation behind their investigation, their advantages, area of applications, and their impact on thermal management and storage equipment. Recent computational and experimental studies have revealed that nanoparticles are extremely useful in terms of improving the thermo-physical properties of PCMs, allowing nano-PCMs, mainly nano-paraffin, to have a major positive influence on thermal concepts at the economical, ecological, and effectiveness levels. In this context, nano-enhanced PCMs are now able to store and release large amounts of heat in short intervals of time, which is relevant to thermal storage systems and contributes to augmenting and boosting their efficiency. It also improves the thermal performance of cooling and heating systems in buildings and regulates the operating temperature of PV systems, electronic components, and batteries.
Pramana, 2022
Many engineers and scientists are working on various studies such as cosmetics, medicines, chemic... more Many engineers and scientists are working on various studies such as cosmetics, medicines, chemicals, oil, gas, food and many others due to the numerous applications of non-Newtonian fluids in technological development and improvement. It is difficult to deal with non-Newtonian fluids compared to Newtonian fluids. Due to the vast applications, a numerical investigation of mixed and convective Casson liquid flow through a duct within a permeable medium under the Lorentz force effect is carried out. The problem is modelled mathematically by employing the mass, momentum, heat energy and conservation laws. The partial differential equations (PDEs) are changed into nonlinear ordinary differential equations (ODEs). These ODEs are numerically computed using the shooting technique and then validated through the Runge-Kutta-Fehlberg method. The influence due to Reynolds, Prandtl and Schmidt numbers and Casson, magnetic, porosity, thermal buoyancy and reaction rate parameters are illustrated graphically and in tabular representation to make the analysis more interesting. This study revealed that the transfer rates of heat energy and mass at the lower wall enhanced with the augmenting values of the thermal buoyancy parameter. There is a linear relationship between the velocity of the Casson parameter and Reynolds numbers. Moreover, velocity enhances with the higher magnetic and porosity parameters and diminishes with higher values of thermal buoyancy, Reynolds number and porosity parameters.
Journal of Magnetism and Magnetic Materials
This research paper performs a numerical investigation on Nano-fluid's laminar flow and t... more This research paper performs a numerical investigation on Nano-fluid's laminar flow and the effect of their thermo-physical characteristics on convective heat transfer. Thus, Ag-Al 2 O 3 /H 2 O hybrid Nano-fluid was chosen based on its excellent properties and a magneto-hydrodynamic flow analysis inside of a modified trapezoidal porous enclosure has been conducted. Using the Darcy-Forchheimer-Brinkmann model and the finite element method to resolve the non-dimension equations, the exploitation was carried out by altering Rayleigh, Darcy, Hartmann, and the volume fraction of the hybrid Nano-fluid. The outcomes revealed intriguing results, supporting the augmentation of Ra, Da, and φ to improve the average Nusselt and boost thermal transfer, and recommending that Ha should be decremented. Furthermore, the findings of this study evaluated the geometrical features of the trapezoid and indicated that decreasing the aspect ratio of the enclosure, the undulation number of the wall, and raising the inclination angle of the side walls are critical for prolonged thermal efficiency and heat transmission.
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Papers by Fateh Mebarek-Oudina
Top researchers, practitioners and policy makers from Asian Pacific areas, North America, Europe and around the world will present the latest innovations and advances on automatic control theory and application, share the experience and insights, forecast the trends and opportunities, and discuss the policy, economics and social implications.
ACTA 2014 ONLY accepts unpublished research papers. Submitted conference papers will be reviewed by technical committees of the Conference. All accepted papers will be published in the conference proceeding by Atlantis Press and be online available in full text via the publication platform, then be submitted for indexing to Thomson ISI ( ISTP, CPCI, Web of Science), Scopus (by Elsevier) and EI/Compendex. “10～20 papers will be selected as the 'best paper', and (after extension) will be recommended for publishing in some International Journals.
The 3-day conference program will feature keynote speeches, Oral presentation, poster presentation and tours. We are proudly and excitedly inviting you to participate in and enjoy this world-class event.
Conference on Advanced Material Research and Technology
(AMRPT2019)
Conference on Applied Mathematics, Algorithms and Modelling
(AMAM2018)
Congratulations to: Fateh Mebarek-Oudina
whose paper has been recognized as a top cited paper* in: HEAT TRANSFER
http://top25.sciencedirect.com/subject/engineering/12/journal/journal-of-the-franklin-institute/00160032/archive/45/
April to June 2013:
http://top25.sciencedirect.com/subject/engineering/12/journal/journal-of-the-franklin-institute/00160032/archive/46/
July to September 2013:
http://top25.sciencedirect.com/subject/engineering/12/journal/journal-of-the-franklin-institute/00160032/archive/47/"
October to December 2013:
http://top25.sciencedirect.com/subject/decision-sciences/8/journal/journal-of-the-franklin-institute/00160032/archive/48/