Heat transfer enhancement of ferrofluid flow in a solar absorber tube under non-uniform magnetic field created by a periodic current-carrying wire

Dahmani, Abdelouahid; Muñoz-Cámara, J.; Laouedj, Samir; Solano, J.P.

doi:10.1016/j.seta.2022.101996

Cited by 9 publications

(8 citation statements)

References 33 publications

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“…The current outcomes on the impact of a variable magnetic field and its intensity on the flow and heat transfer characteristics are qualitatively comparable to those of several earlier research works (Ganguly et al 2004;Ghasemian et al 2015;Nessab et al 2019;Jarray et al 2020;Mehrez and El Cafsi 2021;Dahmani et al 2022) despite the difference in the study conditions. To highlight the interest in the interaction between the magnetic field and the blocks' shape, we present in Fig.…”

Section: Resultssupporting

confidence: 85%

“…For this purpose, numerous experimental and numerical studies have been devoted to the problem of ferrofluid flow in the presence of a non-uniform magnetic field, also known as ferrohydrodynamics (FHD). Improvement of ferrofluid heat exchange by introducing one or more line dipoles was explored by Ganguly et al (2004), Ghasemian et al (2015), Larimi et al (2016), Ghorbani et al (2018), Nessab et al (2019), Shah and Khandekar (2019), Mehrez and El Cafsi (2021), Shaker et al (2021), and Dahmani et al (2022). They found that vortices are formed locally in the dipoles' vicinity under the Kelvin force effect, which positively affects energy transport.…”

Section: Introductionmentioning

confidence: 99%

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Ferrohydrodynamics Mixed Convection of a Ferrofluid in a Vertical Channel with Porous Blocks of Various Shapes

2023

JAFM

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Numerical simulations of (water-Fe3O4) ferrohydrodynamics (FHD) mixed convection inside a vertical channel are performed. The magnetic field is produced by three sources positioned outside the channel’s right wall. The latter is provided with localized heat sources surmounted by variously shaped porous blocks: rectangular, trapezoidal, and triangular. The general model of Darcy-Brinkman-Forchheimer is employed to describe the fluid flow in the porous regions, and the resulting equations are numerically solved by the finite volume approach. The influence of significant parameters, including the magnetic number (Mn), the Richardson number (Ri), and the shape of blocks, is examined. The results essentially reveal that the enhanced heat transfer brought by the magnetic field and its intensity increase is suppressed by the augmentation of Ri until a critical value, rising with Mn, beyond which the global Nusselt number increases again. The mean friction coefficient increases with increased Mn and reduced Ri. Compared to the case with no magnetic field, the maximum enhancement in heat transfer rate is around 132% for the rectangular blocks, 146% for the trapezoidal blocks, and 160% for the triangular blocks, while the maximum increase in pressure drop is approximately 45% for all the shapes. The triangular shape seems the most efficient because it leads to high heat transfer rates and low mean friction coefficients; its performance factor is 2.32 for a dominant magnetic field and 2.62 for a dominant buoyancy force. The current research's conclusions will help optimize the operation of various thermal engineering systems, including electronic devices, where the improved heat removal rate will keep the electronic components at a safe operating temperature.

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Section: Resultssupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Ferrohydrodynamics Mixed Convection of a Ferrofluid in a Vertical Channel with Porous Blocks of Various Shapes

2023

JAFM

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“…Crucial parametric constrains were considered to be the Rayleigh Number and the MF which was induced by the current carrying wires in the duct. Figures 5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25 and 26 depicts the behaviour of the flow fluid and the thermal distribution in the duct with three and two dimensional plots.…”

Section: Resultsmentioning

confidence: 99%

“…Briggs and Mestel 20 showed a linear stability of a ferrofluid centered on a CCWM. Dahmaniet al 21 enhanced the HT of ferrofluid movement in a solar absorber tube by a periodic CCWM. Sharma et al 22 analyzed the MFstrength of multiple coiled utilizing the idea of CCWM.…”

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confidence: 99%

A study of pressure-driven flow in a vertical duct near two current-carrying wires using finite volume technique

Ali

Jamshed

Devi

et al. 2022

Sci Rep

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For heating, ventilation or air conditioning purposes in massive multistory building constructions, ducts are a common choice for air supply, return, or exhaust. Rapid population expansion, particularly in industrially concentrated areas, has given rise to a tradition of erecting high-rise buildings in which contaminated air is removed by making use of vertical ducts. For satisfying the enormous energy requirements of such structures, high voltage wires are used which are typically positioned near the ventilation ducts. This leads to a consequent motivation of studying the interaction of magnetic field (MF) around such wires with the flow in a duct, caused by vacuum pump or exhaust fan etc. Therefore, the objective of this work is to better understand how the established (thermally and hydrodynamically) movement in a perpendicular square duct interacts with the MF formed by neighboring current-carrying wires. A constant pressure gradient drives the flow under the condition of uniform heat flux across the unit axial length, with a fixed temperature on the duct periphery. After incorporating the flow assumptions and dimensionless variables, the governing equations are numerically solved by incorporating a finite volume approach. As an exclusive finding of the study, we have noted that MF caused by the wires tends to balance the flow reversal due to high Raleigh number. The MF, in this sense, acts as a balancing agent for the buoyancy effects, in the laminar flow regime

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“…Saeed et al, [10] claimed velocity profile gradient decrease as ferrofluid and viscosity parameter increase. Ferrofluid is also used to create new smart fluid and solar application like [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Boundary Layer Flow of Williamson Hybrid Ferrofluid over A Permeable Stretching Sheet with Thermal Radiation Effects

Rosli

Mohamed

Sarif

et al. 2023

CFDL

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This research investigated the convective boundary layer flow and heat transfer of Williamson hybrid ferrofluid over a permeable stretching sheet with thermal radiation effects. Human blood is employed as a based fluid while magnetite (Fe3O4) and copper (Cu) are taken as the hybrid ferroparticle. The study started with transforming the non-linear partial differential equation system that governed the model to a more convenience non-linear dimensionless ordinary differential equations using the similarity transformation. The transformed equations obtained then are solved numerically using the Runge-Kutta-Fehlberg (RKF45) method in Maple software. The characteristics and effects of stretching parameter, permeability parameter, thermal radiation parameter as well as the ferroparticle volume fraction in the Williamson hybrid ferrofluid towards the temperature profiles, velocity profiles as well as the Nusselt number and the skin friction coefficient are analysed and discussed. The result of this research for various pertinent parameter varies differently. It can be concluded that the increase in magnetic parameter, the Williamson parameter, the stretching parameter, and the permeability rate parameter increase the skin friction and reduced the velocity profile. Furthermore, the increase in stretching parameter, thermal radiation parameter and the permeability rate results to the increase in the Nusselt number.

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Heat transfer enhancement of ferrofluid flow in a solar absorber tube under non-uniform magnetic field created by a periodic current-carrying wire

Cited by 9 publications

References 33 publications

Ferrohydrodynamics Mixed Convection of a Ferrofluid in a Vertical Channel with Porous Blocks of Various Shapes

Ferrohydrodynamics Mixed Convection of a Ferrofluid in a Vertical Channel with Porous Blocks of Various Shapes

A study of pressure-driven flow in a vertical duct near two current-carrying wires using finite volume technique

Boundary Layer Flow of Williamson Hybrid Ferrofluid over A Permeable Stretching Sheet with Thermal Radiation Effects

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