Unsteady mixed convection flow of variable viscosity nanofluid in a micro-channel filled with a porous medium

Hindebu, Bullo; Makinde, Oluwole Daniel; Guta, Lemi

doi:10.1007/s12648-021-02116-y

Cited by 9 publications

(3 citation statements)

References 27 publications

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“…In order to find a good compromise between the error and the computational time, four different simulations were performed using four different uniform meshes, all built with rectangular cells, with φ=6% and Gr=10 4 . The average Nusselt number along the heated plate was evaluated using the fourth of the Equations (17). Finally, the percentage errors with respect to the finest mesh were calculated.…”

Section: Numerical Proceduresmentioning

confidence: 99%

“…However, this kind of system seems not to be explored with nanofluids. Researchers preferred to concentrate efforts in other systems, like rotating channels (15), ducts with triangular ribs (16), micro-channels with porous media (17), rectangular enclosures (18). The analysis is accomplished in electronic cooling frame in order to understand the possible improvement due to the use of nanofluids.…”

Section: Introductionmentioning

confidence: 99%

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Numerical study on the mixed convection with nanofluids in vertical channel asymmetrically heated

Barbato,

Buonomo,

Manca

et al. 2023

J. Phys.: Conf. Ser.

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Mixed convection heat transfer in cavities is of great interest in many industrial applications, such as the development of crystals, the thermal control of electronic components, the nuclear reactors and various manufacturing processes. Components are generally located on the wall of a channel, that can be also tilted and their thermal control is carried out by the fluid flow. They can be schematized as thermal sources on vertical boards and the heat flux is removed by natural or mixed convection. As to the mixed convection, the interaction between the buoyancy forces and the external flow plays a significant role in the thermal design of systems. When natural convection is not strong enough to remove heat flux, mixed convection is adoptedIn particular, mixed convection due to moving surfaces is very important is these applications. Mixed convection because of buoyancy and motion of one of the channel walls has received little research attention and few guidelines are available for choosing the best performing channel configuration. Moreover, to optimize the transfer through natural convection, it is possible to modify the geometric parameters of the component, thus maximizing the convective heat transfer coefficient. If this is not possible or if one chooses to keep the geometry of the component unchanged for design choices, a possible alternative is the use of nanofluids. The properties of nanofluids exhibit a behaviour ranging between the properties of the base fluid and the properties of the nanoparticles. However, the addition of nanoparticles in the working fluid is considered to enhance the thermal behaviour of the base fluid. In this study a numerical investigation of mixed convection in nanofluids due to the interaction between a buoyancy flow and a moving plate induced flow in a vertical channel is carried out. The moving plate has a constant velocity and moves in the same direction with respect to the buoyancy force. The channel principal walls are heated with uniform heat flux. The numerical analysis is obtained by means of the commercial code Fluent. The effects of the different wall heat fluxes and moving plate velocities are investigated and results in terms of the channel wall and moving plate temperatures and Nusselt numbers are given.

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Section: Numerical Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical study on the mixed convection with nanofluids in vertical channel asymmetrically heated

Barbato,

Buonomo,

Manca

et al. 2023

J. Phys.: Conf. Ser.

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“…Khamis et al [27] have considered a porous pipe through which a water-based nanofluid is allowed to flow, having alumina and copper particles, for the study of variable viscosity and buoyancy force. A theoretical study organized by Hindebu et al [28] focused on the unsteady thermal and hydrodynamic behavior of nanofluid flow through the micro-channel with mixed convection and porous medium. A finite difference method based on the semi-discretization technique is utilized to solve the problem.…”

Section: Introductionmentioning

confidence: 99%

Koo‐Kleinstreuer‐Li magneto‐nanofluid model for non‐Newtonian micropolar fluid through porous channel

Lone,

Bilal,

Mehmood

et al. 2024

Z Angew Math Mech

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The primary concern of writing this article is to study the rheological properties of the micropolar non‐Newtonian nanofluid flowing through the porous medium along with magnetic field effects. In it, the outer boundary of the sheet is heated by applying an external heat source. The insertion of aluminum oxide nanoparticles in water turned it into a nanofluid. Together with the viscous dissipation phenomena, adding a magnetic field has another effect known as a Joule heating impact that is considered in the energy equation. To investigate the impact of viscosity and thermal conductivity on flow patterns, we considered the Koo‐Kleinstreuer‐Li model. A generalized Proudman‐Johnson equation is obtained by using similarity transformation on Navier‐Stokes equations. The well‐known classical shooting method is used to get the numerical solution to the said problem. Graphical results are portrayed for variant rheological parameters lke power law index, Reynolds number, volume fraction, Prandtl number, expansion ratio, and Hartmann number on the velocity and temperature of nanofluids.

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Unsteady mixed convection of a radiating and reacting nanofluid with variable properties in a porous medium microchannel

2021

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Unsteady mixed convection flow of variable viscosity nanofluid in a micro-channel filled with a porous medium

Cited by 9 publications

References 27 publications

Numerical study on the mixed convection with nanofluids in vertical channel asymmetrically heated

Numerical study on the mixed convection with nanofluids in vertical channel asymmetrically heated

Koo‐Kleinstreuer‐Li magneto‐nanofluid model for non‐Newtonian micropolar fluid through porous channel

Unsteady mixed convection of a radiating and reacting nanofluid with variable properties in a porous medium microchannel

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