MERYEM Brahimi
براهيمي مريم
meriem.brahimi@univ-msila.dz
0674379989
- Departement of Physics
- Faculty of Sciences
- Grade PHd
About Me
Sciences de la Matière
Filiere
Physique
Location
Msila, Msila
Msila, ALGERIA
Code RFIDE- 1997-07-24 00:00:00
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MERYEM Brahimi birthday
- 2023-12-02
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2023-12-02
Effect of Ag-CuO/water hybrid nanofluid filled in a cavity on natural convection. Heat transfer characteristic.
This study numerically examines laminar natural convection in a sinusoidal wavy cavity, filled with pure water and Ag-CuO/Water hybrid nanofluid, which is a new advanced nanofluid with two types of nanoparticle materials. The two vertical walls of the enclosure with a sinusoidal undulating geometry are maintained at hot and cold temperatures respectively, while the upper and lower walls are thermally insulated. The present investigation examined the effects of relevant parameters such as sinusoidal wavy wall geometry, for different nanoparticle volume fractions (0% volume concentration ≤𝜙≤6%) and Rayleigh numbers (103 ≤ Ra ≤ 106). The finite volume discretization method is used to solve all the governing equations. The results show that the heat transfer rate inside the corrugated enclosure increases by decreasing the amplitude of the corrugated surface. Additionally, increasing the number of corrugations leads to improving the heat transfer rate. It is also found that by increasing the volume fraction of nanoparticles and the Rayleigh number, the heat transfer rate increases.
Citation
Meryem Brahimi , ,(2023-12-02), Effect of Ag-CuO/water hybrid nanofluid filled in a cavity on natural convection. Heat transfer characteristic.,The 1st National Conference on Physics and it's Applications,Higher Normal School of Bousaada , Algeria
- 2023-06-24
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2023-06-24
Numerical modeling of natural convection heat transfer performance in a sinusoidal corrugated wall enclosure by Employing Hybrid Nanofluid
This study numerically investigates laminar natural convection in a sinusoidal corrugated cavity, filled with pure water and Ag-CuO/Water hybrid nanofluid, which is a new advanced nanofluid with two types of nanoparticulate materials. In this work, the two vertical walls of the enclosure with a sinusoidal undulating geometry are maintained at hot and cold temperatures respectively, while the upper and lower walls are thermally insulated. The present investigation examined the effects of relevant parameters such as the sinusoidal undulating geometry of the walls, for different volume fractions of nanoparticles (0% volume concentration ≤𝜙≤6%) and Rayleigh numbers (103 ≤ Ra ≤ 106). The finite volume discretization method is used to solve the set of governing equations. The results show that the rate of heat transfer inside the corrugated enclosure increases by decreasing the amplitude of the corrugated surface. In addition, increasing the number of corrugations leads to improved heat transfer rate. It is also found that by increasing the volume fraction of the nanoparticles and the Rayleigh number, the rate of heat transfer increases.
Citation
Meryem Brahimi , ,(2023-06-24), Numerical modeling of natural convection heat transfer performance in a sinusoidal corrugated wall enclosure by Employing Hybrid Nanofluid,6. INTERNATIONAL PALANDOKEN SCIENTIFIC STUDIES CONGRESS,ERZURUM / TURKEY
- 2022-11-16
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2022-11-16
INFLUENCE DES NOMBRES DE REYNOLDS ET DE GRASHOF SUR LA CONVECTION MIXTE DANS UNE CAVITE CARREE CONTENANT DES PORTES D’ENTREE ET DE SORTIE DE NANOFLUIDE
In this work, a numerical study of stationary laminar mixed convection in a ventilated square cavity has been presented. The cavity is filled with different nanofluids and contains two gates (ports) to enter and exit the flow. The straight vertical wall is maintained at a warm temperature, while the other walls are considered adiabatic. The equations governing flow and heat transfer have been solved by the finite volume method using a second-order centered Upwind scheme. Numerical simulations are carried out in the case of pure water fluid, and mixtures of this basic fluid and nanoparticles (Ag and Cu), for a number of Ri varying from (0.04 to 4) and a volume fraction of the nanoparticles between (0% and 10%). The study presented in this work is devoted to a dynamic study in which the Grashof number is fixed at 104, and the Reynolds number is varied. The numerical results obtained show that the heat transfer increases with the increase in the volume fraction also that the enhancement of the product of entropy generation and heat transfer increases considerably with the increase in the Reynolds number. The most effective nanoparticles for increasing the heat exchange rate are Ag. The latter are characterized by a large local Nusselt number, that is to say a very good heat transfer compared to that of metallic Cu nanoparticles.
Citation
Meryem Brahimi , ,(2022-11-16), INFLUENCE DES NOMBRES DE REYNOLDS ET DE GRASHOF SUR LA CONVECTION MIXTE DANS UNE CAVITE CARREE CONTENANT DES PORTES D’ENTREE ET DE SORTIE DE NANOFLUIDE,INTERNATIONAL MEDITERRANEAN CONGRESS,Mersin, Türkiye
- 2022-10-26
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2022-10-26
EFFECT OF THE HYBRID NANOFLUID (AG–CUO/WATER) ON THE HEAT TRANSFER CHARACTERISTICS BY NATURAL CONVECTION IN A SQUARE CAVITY: NUMERICAL STUDY
In this work, we conducted a digital study of the stationary laminar flow by free convection in a two-dimensional cavity filled with different nanofluids (nanofluids and hybrid nanofluids) was carried out and mixtures of this base fluid and nanoparticles (Ag, Cu ) and hybrid nanoparticle (Ag-CuO), for a Rayleigh number varying from 103 to 105, and a volume fraction of the nanoparticles between (0.0, 0.02, 0.04, 0.2 and 0.4). The square cavity is heated isothermally from below. Indeed, 1/3 of the surface of the lower wall is heated by a heat source (The source is to maintain the lower wall at constant temperature), the two vertical side walls are cooled and the upper wall is kept adiabatic. The governing equations have been solved numerically via the finite volume method using a power law scheme (Power-Low) .The results obtained show They show that the heat transfer increases with the increase of the volume fraction and the number of Rayleigh Thus the heat transfer rate (Nu) increases with increasing Ra.
Citation
Meryem Brahimi , ,(2022-10-26), EFFECT OF THE HYBRID NANOFLUID (AG–CUO/WATER) ON THE HEAT TRANSFER CHARACTERISTICS BY NATURAL CONVECTION IN A SQUARE CAVITY: NUMERICAL STUDY,THE 1ST INTERNATIONAL CONFERENCE ON RENEWABLE MATERIALS AND ENERGIES ICRME2022,OUARGLA-ALGERIA
- 2022-10-26
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2022-10-26
NUMERICAL STUDY OF HEAT TRANSFER BY MIXED CONVECTION IN A CAVITY FILLED WITH NANOFLUID
In this work, a numerical study of stationary laminar mixed convection in a ventilated square cavity has been presented. The cavity is filled with different nanofluids and contains two gates (ports) to enter and exit the flow. The straight vertical wall is maintained at a warm temperature, while the other walls are considered adiabatic. The equations governing flow and heat transfer have been solved by the finite volume method using a second-order centered Upwind scheme. Numerical simulations are carried out in the case of pure water fluid, and mixtures of this basic fluid and nanoparticles (Ag and Cu), for a number of Ri varying from (0.04 to 4) and a volume fraction of the nanoparticles between (0% and 10%). The study presented in this work is devoted to a dynamic study in which the Grashof number is fixed at 104, and the Reynolds number is varied. The numerical results obtained show that the heat transfer increases with the increase in the volume fraction also that the enhancement of the product of entropy generation and heat transfer increases considerably with the increase in the Reynolds number. The most effective nanoparticles for increasing the heat exchange rate are Ag. The latter are characterized by a large local Nusselt number, that is to say a very good heat transfer compared to that of metallic Cu nanoparticles.
Citation
Meryem Brahimi , ,(2022-10-26), NUMERICAL STUDY OF HEAT TRANSFER BY MIXED CONVECTION IN A CAVITY FILLED WITH NANOFLUID,THE 1ST INTERNATIONAL CONFERENCE ON RENEWABLE MATERIALS AND ENERGIES ICRME 2022,OUARGLA-ALGERIA
- 2022
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2022
NUMERICAL STUDY OF HEAT TRANSFER BY MIXED CONVECTION IN A VENTILATED CAVITY FILLED WITH HYBRID NANO-FLUID
In this work, we carried out a numerical study of the stationary laminar flow by mixed convection in a ventilated two-dimensional cavity containing a cold cylinder in the center of the latter. The cavity is filled with different hybrid nano-fluids, (Water/Ag-TiO2) and (Water/Al2O3-TiO2)). The cavity containing two gates (Orifices) of entry and exit of the flow, for a Reynolds number (Re) fixed so that the Richardson number takes the values: Ri = 0.1, 1, 10 and 100, and a volume fraction of the nanoparticles comprised between (0% and 8%). The square cavity is heated isothermally by the surface of the lower wall by a heat source (The source is to maintain the lower wall at constant temperature), the other walls are maintained adiabatic. The equations, which govern the flow, have been solved numerically using the finite volume method. The results obtained show that the heat transfer increases with the increase in the volume fraction and the Richardson number. Thus the heat transfer rate (Nu) increases with the increase in Ri.
Citation
Fares KHALFALLAH , Razik BENDERRADJI , Meryem Brahimi , RAOUACHE El Hadj, ,(2022), NUMERICAL STUDY OF HEAT TRANSFER BY MIXED CONVECTION IN A VENTILATED CAVITY FILLED WITH HYBRID NANO-FLUID,1ST INTERNATIONAL CONFERENCE ON RENEWABLE MATERIALS AND ENERGIES ICRME2022,OUARGLA-ALGERIA