Heatline visualization of conjugate natural convection in a square cavity filled with nanofluid with sinusoidal temperature variations on both horizontal walls

Alsabery, Ammar I.; Chamkha, Ali J.; Saleh, Habibis; Hashim, Ishak

doi:10.1016/j.ijheatmasstransfer.2016.05.031

Cited by 92 publications

(29 citation statements)

References 38 publications

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“…Convective boundary conditions are considered in this analysis. Alsabery et al reported nanoliquid‐free conjugate convection. The study revealed that the augmented Nusselt number is related to wall thickness.…”

Section: Introductionmentioning

confidence: 99%

Marangoni convective nanofluid flow over an electromagnetic actuator in the presence of first‐order chemical reaction

Rasool

Shafiq

Tlili

2019

Heat Trans. Asian Res.

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The present study aims to investigate Marangoni-forced convective nanofluid flow over an electromagnetic actuator (Riga plate). A first-order homogeneous chemical reaction is considered. The thermocapillary and solutocapillary Marangoni effect developed by the surface tension is considered as a driving force for the nanofluid. In addition, Grinberg-term is accounted to involve the impact of Lorentz force impinged by the actuator in the model. A set of nonlinear ordinary differential equations is obtained via suitable transformations for a nonsimilar analysis. Series solutions are achieved through homotopy to discuss the behavior of the velocity field, thermal distribution, and concentration of the nanoparticles graphically. The variation in Nusselt and Sherwood numbers is discussed. The outcomes declared that the flow parallel to the surface of the plate is assisted by the Lorentz forces generated by electromagnetic bars of the actuator resulting in an enhancement in the fluid motion. Furthermore, the stronger Marangoni effect resulted in the declining trend of the temperature profile. The concentration of nanoparticles near the surface reduced intensive chemical reaction inside the nanofluid. K E Y W O R D S

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Section: Introductionmentioning

confidence: 99%

Marangoni convective nanofluid flow over an electromagnetic actuator in the presence of first‐order chemical reaction

Rasool

Shafiq

Tlili

2019

Heat Trans. Asian Res.

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“…Bondareva et al [29] used this technique to study the natural convection of nano uid in an inclined wavy open porous cavity. Alsabery et al [30] utilized heatline visualization technique to investigate natural convection of nano uid in a square cavity with sinusoidal temperature variations on both horizontal walls.…”

Section: Introductionmentioning

confidence: 99%

Natural convection and entropy generation of ultrafine atmospheric aerosols in the presence of hydrodynamic partial slip and thermal radiation due to solar energy

Ghaffarpasand

2017

Scientia Iranica

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Abstract. Combined e ects of hydrodynamic partial slip, thermal radiation due to solar energy, and nanoparticles volume fraction on natural convection and entropy generation of atmospheric ultra ne aerosols sample enclosed within a two-sided lid-driven cavity are studied numerically in the present contribution. Partial slip e ect is taken into account along the two horizontal moving walls, and thermal radiation is considered through Rosseland approximation. The governing equations are solved using an accurate nite volume method based on SIMPLE algorithm. The impact of Brownian motion of nanoparticles is also considered in this study, whereby KKL (Koo-Kleinstreuer-Li) correlation is utilized for simulating the e ective thermal conductivity and viscosity of nano uid. The heatline visualization technique is also utilized to study the energy ux within the cavity. A comprehensive study is conducted on the controlling parameters, including partial slip coe cient ( = 0 5), radiation parameter (Rd = 0 2), and nanoparticles volume fraction ( = 0 4%), which in uence the ow and heat transfer characteristics. Results show that the partial slip usually eliminates the e ect of mechanical forces provoked by the moving lids. Moreover, thermal radiation homogenizes the medium thermally, which results in decreasing the average entropy generation. It is also observed that the e ect of carbon-black nanoparticles on the atmospheric heat transfer manifests a wide variety of fashions mainly dependent on the presence or absence of thermal radiation due to solar energy.

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“…Later on, Makinde and Aziz [3] implemented the convective boundary condition in exhibiting boundarylayer flow of a nanofluid over a stretching surface. Now other researchers [4][5][6][7][8][9][10] have been working towards roping in the investigation for further development in this area.…”

Section: Introductionmentioning

confidence: 99%

Impact of Variable Magnetic Field and Convective Boundary Condition on a Stretched 3D Radiative Flow of Cu-H2O Nanofluid

Nayak¹,

Shaw²,

Chamkha³

2017

MMC_B

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The present study is dealt with the influence of a variable magnetic field and thermal radiation on three-dimensional flow of incompressible nanofluid over an exponentially-stretching sheet in association with a convective boundary condition. Patel model is employed in this study because this model contributes more thermal conductivity and hence the heat transfer capability of nanofluids compared to the Maxwell and Brinkman model. In the present analysis, base fluids such as water, 30% ethylene glycol, 50% ethylene glycol and nanoparticles such as Cu, Ag and Al2O3 are considered. The transformed governing differential equations are solved using fourthorder Runge-Kutta method along with shooting technique and secant method is employed for better approximation. The significant impact of the variable magnetic field and the thermal radiation on the dimensionless velocity, temperature, skin friction and the Nusselt number has been analyzed. The important outcome of the present study is that the Lorentz force due to the presence of the magnetic field impinges its resistance on the fluid motion leading to diminution of the wall shear stresses(axial as well as transverse) in association with a thinner momentum boundary layer and reduction in the heat transfer rate from the sheet developing thicker thermal boundary layer.

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Heatline visualization of conjugate natural convection in a square cavity filled with nanofluid with sinusoidal temperature variations on both horizontal walls

Cited by 92 publications

References 38 publications

Marangoni convective nanofluid flow over an electromagnetic actuator in the presence of first‐order chemical reaction

Marangoni convective nanofluid flow over an electromagnetic actuator in the presence of first‐order chemical reaction

Natural convection and entropy generation of ultrafine atmospheric aerosols in the presence of hydrodynamic partial slip and thermal radiation due to solar energy

Impact of Variable Magnetic Field and Convective Boundary Condition on a Stretched 3D Radiative Flow of Cu-H2O Nanofluid

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