lahoucine belarche - Academia.edu (original) (raw)

Papers by lahoucine belarche

Research paper thumbnail of Three-dimensional Numerical Study of Natural Convection in a Cubical Enclosure with Two Heated Square Sections Submitted to Periodic Temperatures

The three-dimensional numerical study of natural convection in a cubical enclosure, filled with a... more The three-dimensional numerical study of natural convection in a cubical enclosure, filled with air was carried out in this study. Two heating square sections are placed on the vertical wall of the enclosure. The imposed heating temperatures vary sinusoidally with time, in phase and in opposition of phase. The temperature of the opposite vertical wall is maintained at a cold uniform temperature and the other walls are adiabatic. The governing equations are solved using Control volume method by SIMPLEC algorithm. The sections dimension D/L and the Rayleigh number Ra were fixed respectively at 0,2 and 10 6. The temperature distribution, the flow pattern and the average heat transfer will be examined for a given set of the governing parameters, namely the amplitude of the variable temperatures a and their period τ p. The obtained results show significant changes in terms of heat transfer and flow intensity, by proper choice of the heating mode and the governing parameters.

Research paper thumbnail of Using a double grid for the numerical study of the effect of a vertical wall’s grooves in a differentially heated square cavity on the natural convection of a carbon-based nanofluid

Thermal Science

In this work we study numerically the natural convection of a carbon-based nanofluid (water + C60... more In this work we study numerically the natural convection of a carbon-based nanofluid (water + C60) in a differentially heated square cavity. One of the vertical walls of the cavity is grooved and maintained at a high temperature. The purpose of this work is to compare the effect of the macrostructural aspect of the grooves and the effect of the addition of fullerene nanoparticles (C60) to pure water on the heat exchange by natural convection in this type of geometry. To better quantify the convective heat exchange numerically near the grooves we used a refined grid with two non-conforming blocks at the hot wall level. The governing equations were discretized by the finite volume method using a power law scheme which offers a good stability characteristic in this type of flow. A numerical code was designed and produced in this context to use numerical simulation as an investigative tool. The results are represented in the form of streamlines and isothermal fields. The variation in th...

Research paper thumbnail of Effect of the Heating Block Position on Natural Convection in a Three-Dimensional Cavity Filled with Nanofluids

Journal of Applied Fluid Mechanics, 2019

This paper consists on a three-dimensional numerical approach of natural convection in a cavity c... more This paper consists on a three-dimensional numerical approach of natural convection in a cavity containing the nanofluid. The cavity contains an isothermal heating block in the middle of the bottom (case BH) and the top (case TH) walls and kept at a hot temperature TH. The right and the left vertical walls of the cavity are kept at a cold temperature Tc. The study's parameters are: the volume fraction Ф varying between 0 and 0.03, and the Rayleigh number 3 5 10 10 Ra  . The considered nanofluid is water + Cu. The results illustrate that the Rayleigh number Ra and the volume fraction Ф have a positive effect and they also improve the heat transfer. Interesting results have also been found while comparing the two considered configurations.

Research paper thumbnail of Three-dimensional mixed convection heat transfer in a partially heated ventilated cavity

Thermal Science, 2018

The 3-D mixed convective heat transfer inside a ventilated cavity partially heated is studied num... more The 3-D mixed convective heat transfer inside a ventilated cavity partially heated is studied numerically by using control volume method. The heating square portion similar to the integrated electronic devices is placed on the left vertical wall of the enclosure. The right vertical wall is maintained at ambient temperature and all other walls are adiabatic. The results are presented in terms of flow structures, temperature distribution, and global average Nusselt number for various combinations of thermal controlling parameters, namely, the Richardson number (0 ? Ri ? 10), the Reynolds number (10 ? Ri ? 200), the heating section dimension (0. ? ? ? 0.7), and the relative height of the openings B = h/L = 1/8. It is found that for the low Reynolds number the heat transfer process is carried out only by conduction. On the other hand, the highest thermal performance is achieved by reducing the heating section dimension.

Research paper thumbnail of Effect of the inlet opening on mixed convection inside a 3-D ventilated cavity

Thermal Science, 2017

Mixed convection heat transfer in a 3-D ventilated cavity is studied numerically using finite vol... more Mixed convection heat transfer in a 3-D ventilated cavity is studied numerically using finite volume method. The results are presented in terms of streamlines, temperature distribution, velocity fields, and average Nusselt number for different combinations of thermal and geometrical controlling parameters, namely, Reynolds number, Re = 100, Richardson number (0.01 ? Ri ? 10), relative height of the openings (B = h/L = 1/8) and relative width (0.5 ? A = w/L ? 1). The obtained results show that the flow intensity and the heat transfer rate can be significantly improved by an optimal choice of the mentioned parameters.

Research paper thumbnail of Natural convection in a three-dimensional cavity filled with nanofluid and partially heated: Effect of the hating section dimension

IOP Conference Series: Materials Science and Engineering, 2017

This study focuses on heat transfer by natural convection in a three dimensional cavity filled wi... more This study focuses on heat transfer by natural convection in a three dimensional cavity filled with nanoparticles and partially heated from the side with a uniform temperature. The opposite wall of the cavity is maintained in a cold temperature. The effect of nanofluid type on thermal phenomena within the cavity was analyzed for different sizes of the heating section, using the control volume method. The governing parameters are: the Rayleigh number (103≤Ra ≤ 105), the volume fraction (0 ≤ Φ ≤ 0.1), the heating section size (0.5≤ ≤1), and the nanofluid type. The results represent a great interest in terms of the flow and heat transfer through the cavity depending on the chosen parameters sets.

Research paper thumbnail of Numerical study of mixed convection inside a three-dimensional ventilated cavity in the presence of an isothermal heating block

International Journal of Heat and Technology, 2018

A numerical investigation has been carried out to analyze the mixed convection heat transfer in i... more A numerical investigation has been carried out to analyze the mixed convection heat transfer in isothermal heating source within three-dimensional ventilated cavity with different inletoutlet locations by using finite volume method. The results are presented in terms of flow structures, temperature distribution, and average Nusselt number for various combinations of thermal controlling parameters, namely, Reynolds number (50 ≤ Re ≤ 100) and Richardson number (0 ≤ Ri ≤ 10). The obtained results show that the flow intensity and the heat transfer rate can be significantly improved by an optimal choice of the mentioned parameters for different inlet-outlet locations.

Research paper thumbnail of Numerical Study of Natural Convection in a Three-dimensional Cavity Filled with Nanofluids

International Journal of Computer Science Issues, 2016

Natural convection in a cubic cavity filled with nanofluids and discretely heated, is studied num... more Natural convection in a cubic cavity filled with nanofluids and discretely heated, is studied numerically using a threedimensional finite volume formulation. Two heating square portions are placed on the vertical wall of the enclosure, while the rest of the considered wall is adiabatic. These sections are heated with a constant uniform temperature T H while the opposite vertical wall is maintained at a cold uniform temperature T C. The other walls are adiabatic. The fluid flow and heat transfer in the cavity are studied for different sets of the governing parameters, namely the Rayleigh number 10 3 ≤ Ra ≤ 10 5 , type of nanofluid copper (Cu), alumina (Al 2 O 3) and titanium (TiO 2) and volume fraction 0.0 ≤ Ф ≤ 0.2 The heating sections dimension E and the Prandtl number Pr are respectively fixed to 0.15 and 6.2 (water).

Research paper thumbnail of Determination of Optimal Parameters for Cooling an Electronic Component by Natural and Mixed Convection in a Cubic Cavity

Heat Transfer Research, 2022

Research paper thumbnail of Numerical Study of the Thermosolutal Convection in a Three-Dimensional Cavity Submitted to Cross Gradients of Temperature and Concentration

This study is a contribution to the numerical study of the thermosolutal convection in a three-di... more This study is a contribution to the numerical study of the thermosolutal convection in a three-dimensional porous cavity filled with a binary fluid submitted to cross gradients of temperature and concentration. The NavierStokes equations, mass and energy governing the physical problem are discretized by the finite volume method. The equations of conservation of momentum coupled with the continuity equation are solved using the SIMPLEC algorithm, then the obtained system is solved using the implicit alternating directions method (ADI).The numerical simulations, presented here, correspond to a wide range of thermal Rayleigh number Ra (10<Ra<10) and buoyancy ratio N (1<N<12). The Lewis and prandtl number were fixed respectively at 5 and 0 .71 and the sections dimension ε=D / H=0.4. The temperature distribution, the flow pattern and the average heat and mass transfer are examined. The obtained results show significant changes in terms of heat and mass transfer, by proper cho...

Research paper thumbnail of Three-dimensional Numerical Study of the Effect ofHeating Sources Dimension on Natural Convection in aCavity Submitted to Constant Heat Flux

Resume : La convection naturelle dans une cavite cubique, discretement chauffee, est etudiee nume... more Resume : La convection naturelle dans une cavite cubique, discretement chauffee, est etudiee numeriquement en utilisant une formulation volumes finis tridimensionnelle. Deux portions chauffantes sont placees sur la paroi verticale gauche de la cavite, alors que le reste de la paroi consideree est adiabatique. La paroi verticale opposee est maintenue a une temperature uniforme froide et les autres parois sont adiabatiques. Les effets des dimensions des sections chauffantes ɛ (0.15 ≤ ɛ ≤ 0.35) et du nombre de Rayleigh Ra (10 ≤ Ra ≤ 10) sur l'ecoulement du fluide et le transfert de chaleur a l'interieur de la cavite sont etudies. Des lignes de courant et des isothermes ainsi que les variations du nombre de Nusselt moyen sont presentes pour differents ensembles des parametres gouvernants.

Research paper thumbnail of Mixed convection in a three-dimensional ventilated cavity with two isothermal heating Sections

E3S Web of Conferences, 2017

Mixed convection in a three-dimensional ventilated cavity discretely heated has been analyzed num... more Mixed convection in a three-dimensional ventilated cavity discretely heated has been analyzed numerically by the finite volume method. The results are presented in terms of streamlines, temperature distribution and average Nusselt number; for different combinations of thermal controlling parameters namely, Reynolds and Richardson numbers. The computational results indicate that the heat transfer's rate is strongly affected by the mentioned parameters.

Research paper thumbnail of Three-dimensional Numerical Study of Natural Convection in a Cubical Enclosure with Two Heated Square Sections Submitted to Periodic Temperatures

The three- dimensional numerical study of natural convection in a cubical enclosure, filled with ... more The three- dimensional numerical study of natural convection in a cubical enclosure, filled with air was carried out in this study. Two heating square sections are placed on the vertical wall of the enclosure. The imposed heating temperatures vary sinusoidally with time, in phase and in opposition of phase. The temperature of the opposite vertical wall is maintained at a cold uniform temperature and the other walls are adiabatic. The governing equations are solved using Control volume method by SIMPLEC algorithm. The sections dimension D/L and the Rayleigh number Ra were fixed respectively at 0,2 and 10 6 . The temperature distribution, the flow pattern and the average heat transfer will be examined for a given set of the governing parameters, namely the amplitude of the variable temperatures a and their period τp. The obtained results show significant changes in terms of heat transfer and flow intensity, by proper choice of the heating mode and the governing parameters.

Research paper thumbnail of A 3D numerical simulation of a mixed convection flow in a building integrated photovoltaic thermal (BIPV/T) front

E3S Web of Conferences

In the present paper, a numerical study of mixed convection flow of a three-dimensional building ... more In the present paper, a numerical study of mixed convection flow of a three-dimensional building integrated photovoltaic thermal front (BIPV/T) has been investigated. The configuration consists of a cubical system heated by a solar panel partition. The left wall has an inlet damper at the bottom allowing the cold air flotation in a gap between the solar panel and the opposite vertical insulated wall. The finite volume method is used to analyze the dynamic, thermal fields and the heat transfer flow of the system. The results revealed that the heat transfer rate is affected by Reynolds and Nusselt number’s variations.

Research paper thumbnail of Three-dimensional simulation of controlled cooling of electronic component by natural and mixed convection

Thermal Science

The present study is the three-dimensional simulation of cooling control of electronic component,... more The present study is the three-dimensional simulation of cooling control of electronic component, by natural convection and mixed convection in a cubical enclosure, filled with air. The heating square portion similar to the integrated electronic device and releasing a constant flux is placed on the right vertical wall of the enclosure. The same wall has, in its upper part, an extractor, while the rest of the considered wall is adiabatic. Its opposite wall has an opening maintained at a cold temperature. For low temperatures, the cooling of the component is provided by natural convection, however, in the case of strong temperature gradients, the extractor, operating at variable velocity, allows the evacuation of the dissipated heat. The cooling control of the component, the temperature distribution as well as the flow of fluid in the cavity is studied according to the governing parameters, namely the Rayleigh number, Ra and Reynolds number Re. The obtained results show that the contr...

Research paper thumbnail of Effect of Inclination Angle and Rayleigh Number on Double Natural Convection Within a Three-Dimensional Cavity Subject to Cross-Dimensional Gradients of Temperature and Concentration

JP Journal of Heat and Mass Transfer

Research paper thumbnail of Effect of Periodic Imposed Heat Flux on Three-Dimensional Natural Convection in a Partially Heated Cubical Enclosure

Applied Mechanics and Materials, 2016

Research paper thumbnail of Numerical Study of Thermosolutal Convection in Anisotropic Porous Media Subject to Cross-Fluxes of Heat and Mass

Journal of Porous Media, 2006

In this paper, we present a numerical study of an anisotropic porous medium where we analyze doub... more In this paper, we present a numerical study of an anisotropic porous medium where we analyze double-diffusive natural convection in a square cavity filled with porous media that is subject to uniform heat flux along vertical walls and a solutal flux along horizontal surfaces. The ...

Research paper thumbnail of Effect of the inclination on three-dimensional incompressible fluid flow in a discretely heated cavity

Natural convection in inclined cubic cavity, discretely heated, is studied numerically using a th... more Natural convection in inclined cubic cavity, discretely heated, is studied numerically using a three-dimensional finite volume formulation. Two heating square portions are placed on the vertical wall of the enclosure, while the rest of the considered wall is adiabatic. These sections, similar to the integrated electronic components, generate a heat flux q&amp;amp;amp;amp;quot;. The opposite vertical wall is maintained at a cold uniform temperature Tc and the other walls are adiabatic. The fluid flow and heat transfer in the cavity are studied for different sets of the governing parameters, namely the Rayleigh number Ra (103 ≤ Ra ≤ 107), the cavity inclination γ (- 45° ≤ γ ≤ 45°) and the position of the heating sections λ (0.3 ≤ λ ≤ 0.7). The dimensions of the heater sections, ε = D / H and the longitudinal aspect ratio of the cavity Ax = H / L are respectively fixed to 0.35 and 1.

Research paper thumbnail of Three-dimensional Numerical Study of Natural Convection in a Cubical Enclosure with Two Heated Square Sections Submitted to Periodic Temperatures

The three-dimensional numerical study of natural convection in a cubical enclosure, filled with a... more The three-dimensional numerical study of natural convection in a cubical enclosure, filled with air was carried out in this study. Two heating square sections are placed on the vertical wall of the enclosure. The imposed heating temperatures vary sinusoidally with time, in phase and in opposition of phase. The temperature of the opposite vertical wall is maintained at a cold uniform temperature and the other walls are adiabatic. The governing equations are solved using Control volume method by SIMPLEC algorithm. The sections dimension D/L and the Rayleigh number Ra were fixed respectively at 0,2 and 10 6. The temperature distribution, the flow pattern and the average heat transfer will be examined for a given set of the governing parameters, namely the amplitude of the variable temperatures a and their period τ p. The obtained results show significant changes in terms of heat transfer and flow intensity, by proper choice of the heating mode and the governing parameters.

Research paper thumbnail of Using a double grid for the numerical study of the effect of a vertical wall’s grooves in a differentially heated square cavity on the natural convection of a carbon-based nanofluid

Thermal Science

In this work we study numerically the natural convection of a carbon-based nanofluid (water + C60... more In this work we study numerically the natural convection of a carbon-based nanofluid (water + C60) in a differentially heated square cavity. One of the vertical walls of the cavity is grooved and maintained at a high temperature. The purpose of this work is to compare the effect of the macrostructural aspect of the grooves and the effect of the addition of fullerene nanoparticles (C60) to pure water on the heat exchange by natural convection in this type of geometry. To better quantify the convective heat exchange numerically near the grooves we used a refined grid with two non-conforming blocks at the hot wall level. The governing equations were discretized by the finite volume method using a power law scheme which offers a good stability characteristic in this type of flow. A numerical code was designed and produced in this context to use numerical simulation as an investigative tool. The results are represented in the form of streamlines and isothermal fields. The variation in th...

Research paper thumbnail of Effect of the Heating Block Position on Natural Convection in a Three-Dimensional Cavity Filled with Nanofluids

Journal of Applied Fluid Mechanics, 2019

This paper consists on a three-dimensional numerical approach of natural convection in a cavity c... more This paper consists on a three-dimensional numerical approach of natural convection in a cavity containing the nanofluid. The cavity contains an isothermal heating block in the middle of the bottom (case BH) and the top (case TH) walls and kept at a hot temperature TH. The right and the left vertical walls of the cavity are kept at a cold temperature Tc. The study's parameters are: the volume fraction Ф varying between 0 and 0.03, and the Rayleigh number 3 5 10 10 Ra  . The considered nanofluid is water + Cu. The results illustrate that the Rayleigh number Ra and the volume fraction Ф have a positive effect and they also improve the heat transfer. Interesting results have also been found while comparing the two considered configurations.

Research paper thumbnail of Three-dimensional mixed convection heat transfer in a partially heated ventilated cavity

Thermal Science, 2018

The 3-D mixed convective heat transfer inside a ventilated cavity partially heated is studied num... more The 3-D mixed convective heat transfer inside a ventilated cavity partially heated is studied numerically by using control volume method. The heating square portion similar to the integrated electronic devices is placed on the left vertical wall of the enclosure. The right vertical wall is maintained at ambient temperature and all other walls are adiabatic. The results are presented in terms of flow structures, temperature distribution, and global average Nusselt number for various combinations of thermal controlling parameters, namely, the Richardson number (0 ? Ri ? 10), the Reynolds number (10 ? Ri ? 200), the heating section dimension (0. ? ? ? 0.7), and the relative height of the openings B = h/L = 1/8. It is found that for the low Reynolds number the heat transfer process is carried out only by conduction. On the other hand, the highest thermal performance is achieved by reducing the heating section dimension.

Research paper thumbnail of Effect of the inlet opening on mixed convection inside a 3-D ventilated cavity

Thermal Science, 2017

Mixed convection heat transfer in a 3-D ventilated cavity is studied numerically using finite vol... more Mixed convection heat transfer in a 3-D ventilated cavity is studied numerically using finite volume method. The results are presented in terms of streamlines, temperature distribution, velocity fields, and average Nusselt number for different combinations of thermal and geometrical controlling parameters, namely, Reynolds number, Re = 100, Richardson number (0.01 ? Ri ? 10), relative height of the openings (B = h/L = 1/8) and relative width (0.5 ? A = w/L ? 1). The obtained results show that the flow intensity and the heat transfer rate can be significantly improved by an optimal choice of the mentioned parameters.

Research paper thumbnail of Natural convection in a three-dimensional cavity filled with nanofluid and partially heated: Effect of the hating section dimension

IOP Conference Series: Materials Science and Engineering, 2017

This study focuses on heat transfer by natural convection in a three dimensional cavity filled wi... more This study focuses on heat transfer by natural convection in a three dimensional cavity filled with nanoparticles and partially heated from the side with a uniform temperature. The opposite wall of the cavity is maintained in a cold temperature. The effect of nanofluid type on thermal phenomena within the cavity was analyzed for different sizes of the heating section, using the control volume method. The governing parameters are: the Rayleigh number (103≤Ra ≤ 105), the volume fraction (0 ≤ Φ ≤ 0.1), the heating section size (0.5≤ ≤1), and the nanofluid type. The results represent a great interest in terms of the flow and heat transfer through the cavity depending on the chosen parameters sets.

Research paper thumbnail of Numerical study of mixed convection inside a three-dimensional ventilated cavity in the presence of an isothermal heating block

International Journal of Heat and Technology, 2018

A numerical investigation has been carried out to analyze the mixed convection heat transfer in i... more A numerical investigation has been carried out to analyze the mixed convection heat transfer in isothermal heating source within three-dimensional ventilated cavity with different inletoutlet locations by using finite volume method. The results are presented in terms of flow structures, temperature distribution, and average Nusselt number for various combinations of thermal controlling parameters, namely, Reynolds number (50 ≤ Re ≤ 100) and Richardson number (0 ≤ Ri ≤ 10). The obtained results show that the flow intensity and the heat transfer rate can be significantly improved by an optimal choice of the mentioned parameters for different inlet-outlet locations.

Research paper thumbnail of Numerical Study of Natural Convection in a Three-dimensional Cavity Filled with Nanofluids

International Journal of Computer Science Issues, 2016

Natural convection in a cubic cavity filled with nanofluids and discretely heated, is studied num... more Natural convection in a cubic cavity filled with nanofluids and discretely heated, is studied numerically using a threedimensional finite volume formulation. Two heating square portions are placed on the vertical wall of the enclosure, while the rest of the considered wall is adiabatic. These sections are heated with a constant uniform temperature T H while the opposite vertical wall is maintained at a cold uniform temperature T C. The other walls are adiabatic. The fluid flow and heat transfer in the cavity are studied for different sets of the governing parameters, namely the Rayleigh number 10 3 ≤ Ra ≤ 10 5 , type of nanofluid copper (Cu), alumina (Al 2 O 3) and titanium (TiO 2) and volume fraction 0.0 ≤ Ф ≤ 0.2 The heating sections dimension E and the Prandtl number Pr are respectively fixed to 0.15 and 6.2 (water).

Research paper thumbnail of Determination of Optimal Parameters for Cooling an Electronic Component by Natural and Mixed Convection in a Cubic Cavity

Heat Transfer Research, 2022

Research paper thumbnail of Numerical Study of the Thermosolutal Convection in a Three-Dimensional Cavity Submitted to Cross Gradients of Temperature and Concentration

This study is a contribution to the numerical study of the thermosolutal convection in a three-di... more This study is a contribution to the numerical study of the thermosolutal convection in a three-dimensional porous cavity filled with a binary fluid submitted to cross gradients of temperature and concentration. The NavierStokes equations, mass and energy governing the physical problem are discretized by the finite volume method. The equations of conservation of momentum coupled with the continuity equation are solved using the SIMPLEC algorithm, then the obtained system is solved using the implicit alternating directions method (ADI).The numerical simulations, presented here, correspond to a wide range of thermal Rayleigh number Ra (10<Ra<10) and buoyancy ratio N (1<N<12). The Lewis and prandtl number were fixed respectively at 5 and 0 .71 and the sections dimension ε=D / H=0.4. The temperature distribution, the flow pattern and the average heat and mass transfer are examined. The obtained results show significant changes in terms of heat and mass transfer, by proper cho...

Research paper thumbnail of Three-dimensional Numerical Study of the Effect ofHeating Sources Dimension on Natural Convection in aCavity Submitted to Constant Heat Flux

Resume : La convection naturelle dans une cavite cubique, discretement chauffee, est etudiee nume... more Resume : La convection naturelle dans une cavite cubique, discretement chauffee, est etudiee numeriquement en utilisant une formulation volumes finis tridimensionnelle. Deux portions chauffantes sont placees sur la paroi verticale gauche de la cavite, alors que le reste de la paroi consideree est adiabatique. La paroi verticale opposee est maintenue a une temperature uniforme froide et les autres parois sont adiabatiques. Les effets des dimensions des sections chauffantes ɛ (0.15 ≤ ɛ ≤ 0.35) et du nombre de Rayleigh Ra (10 ≤ Ra ≤ 10) sur l'ecoulement du fluide et le transfert de chaleur a l'interieur de la cavite sont etudies. Des lignes de courant et des isothermes ainsi que les variations du nombre de Nusselt moyen sont presentes pour differents ensembles des parametres gouvernants.

Research paper thumbnail of Mixed convection in a three-dimensional ventilated cavity with two isothermal heating Sections

E3S Web of Conferences, 2017

Mixed convection in a three-dimensional ventilated cavity discretely heated has been analyzed num... more Mixed convection in a three-dimensional ventilated cavity discretely heated has been analyzed numerically by the finite volume method. The results are presented in terms of streamlines, temperature distribution and average Nusselt number; for different combinations of thermal controlling parameters namely, Reynolds and Richardson numbers. The computational results indicate that the heat transfer's rate is strongly affected by the mentioned parameters.

Research paper thumbnail of Three-dimensional Numerical Study of Natural Convection in a Cubical Enclosure with Two Heated Square Sections Submitted to Periodic Temperatures

The three- dimensional numerical study of natural convection in a cubical enclosure, filled with ... more The three- dimensional numerical study of natural convection in a cubical enclosure, filled with air was carried out in this study. Two heating square sections are placed on the vertical wall of the enclosure. The imposed heating temperatures vary sinusoidally with time, in phase and in opposition of phase. The temperature of the opposite vertical wall is maintained at a cold uniform temperature and the other walls are adiabatic. The governing equations are solved using Control volume method by SIMPLEC algorithm. The sections dimension D/L and the Rayleigh number Ra were fixed respectively at 0,2 and 10 6 . The temperature distribution, the flow pattern and the average heat transfer will be examined for a given set of the governing parameters, namely the amplitude of the variable temperatures a and their period τp. The obtained results show significant changes in terms of heat transfer and flow intensity, by proper choice of the heating mode and the governing parameters.

Research paper thumbnail of A 3D numerical simulation of a mixed convection flow in a building integrated photovoltaic thermal (BIPV/T) front

E3S Web of Conferences

In the present paper, a numerical study of mixed convection flow of a three-dimensional building ... more In the present paper, a numerical study of mixed convection flow of a three-dimensional building integrated photovoltaic thermal front (BIPV/T) has been investigated. The configuration consists of a cubical system heated by a solar panel partition. The left wall has an inlet damper at the bottom allowing the cold air flotation in a gap between the solar panel and the opposite vertical insulated wall. The finite volume method is used to analyze the dynamic, thermal fields and the heat transfer flow of the system. The results revealed that the heat transfer rate is affected by Reynolds and Nusselt number’s variations.

Research paper thumbnail of Three-dimensional simulation of controlled cooling of electronic component by natural and mixed convection

Thermal Science

The present study is the three-dimensional simulation of cooling control of electronic component,... more The present study is the three-dimensional simulation of cooling control of electronic component, by natural convection and mixed convection in a cubical enclosure, filled with air. The heating square portion similar to the integrated electronic device and releasing a constant flux is placed on the right vertical wall of the enclosure. The same wall has, in its upper part, an extractor, while the rest of the considered wall is adiabatic. Its opposite wall has an opening maintained at a cold temperature. For low temperatures, the cooling of the component is provided by natural convection, however, in the case of strong temperature gradients, the extractor, operating at variable velocity, allows the evacuation of the dissipated heat. The cooling control of the component, the temperature distribution as well as the flow of fluid in the cavity is studied according to the governing parameters, namely the Rayleigh number, Ra and Reynolds number Re. The obtained results show that the contr...

Research paper thumbnail of Effect of Inclination Angle and Rayleigh Number on Double Natural Convection Within a Three-Dimensional Cavity Subject to Cross-Dimensional Gradients of Temperature and Concentration

JP Journal of Heat and Mass Transfer

Research paper thumbnail of Effect of Periodic Imposed Heat Flux on Three-Dimensional Natural Convection in a Partially Heated Cubical Enclosure

Applied Mechanics and Materials, 2016

Research paper thumbnail of Numerical Study of Thermosolutal Convection in Anisotropic Porous Media Subject to Cross-Fluxes of Heat and Mass

Journal of Porous Media, 2006

In this paper, we present a numerical study of an anisotropic porous medium where we analyze doub... more In this paper, we present a numerical study of an anisotropic porous medium where we analyze double-diffusive natural convection in a square cavity filled with porous media that is subject to uniform heat flux along vertical walls and a solutal flux along horizontal surfaces. The ...

Research paper thumbnail of Effect of the inclination on three-dimensional incompressible fluid flow in a discretely heated cavity

Natural convection in inclined cubic cavity, discretely heated, is studied numerically using a th... more Natural convection in inclined cubic cavity, discretely heated, is studied numerically using a three-dimensional finite volume formulation. Two heating square portions are placed on the vertical wall of the enclosure, while the rest of the considered wall is adiabatic. These sections, similar to the integrated electronic components, generate a heat flux q&amp;amp;amp;amp;quot;. The opposite vertical wall is maintained at a cold uniform temperature Tc and the other walls are adiabatic. The fluid flow and heat transfer in the cavity are studied for different sets of the governing parameters, namely the Rayleigh number Ra (103 ≤ Ra ≤ 107), the cavity inclination γ (- 45° ≤ γ ≤ 45°) and the position of the heating sections λ (0.3 ≤ λ ≤ 0.7). The dimensions of the heater sections, ε = D / H and the longitudinal aspect ratio of the cavity Ax = H / L are respectively fixed to 0.35 and 1.