Three-dimensional investigation of the effects of external magnetic field inclination on laminar natural convection heat transfer in CNT–water nanofluid filled cavity

Al‐Rashed, Abdullah A.A.A.; Kalidasan, K.; Kolsi, Lioua; Aydi, Abdelkarim; Malekshah, Emad Hasani; Hussein, Ahmed Kadhim; Kanna, P. Rajesh

doi:10.1016/j.molliq.2018.01.006

Cited by 103 publications

(29 citation statements)

References 44 publications

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“…Sheikholeslami et al [40] numerically studied the effects of Lorentz forces in 3D cavity with nanofluids and the numerical results showed that the heat transfer rate is reduced with higher magnetic field strength. In another study, Al-Rashed et al [41] used finite volume method for analyzing 3D natural convection in a cubic enclosure with carbon nano-tube (CNT)-water nanofluid and magnetic field. The average Nu number was found to reduce by 50% when magentic field strength is increased from Hartmann number of 50 to Hartmann number of 100.…”

Section: Introductionmentioning

confidence: 99%

Effects of a Rotating Cone on the Mixed Convection in a Double Lid-Driven 3D Porous Trapezoidal Nanofluid Filled Cavity under the Impact of Magnetic Field

2020

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Effects of a rotating cone in 3D mixed convection of CNT-water nanofluid in a double lid-driven porous trapezoidal cavity is numerically studied considering magnetic field effects. The numerical simulations are performed by using the finite element method. Impacts of Richardson number (between 0.05 and 50), angular rotational velocity of the cone (between −300 and 300), Hartmann number (between 0 and 50), Darcy number (between 10 − 4 and 5 × 10 − 2 ), aspect ratio of the cone (between 0.25 and 2.5), horizontal location of the cone (between 0.35 H and 0.65 H) and solid particle volume fraction (between 0 and 0.004) on the convective heat transfer performance was studied. It was observed that the average Nusselt number rises with higher Richardson numbers for stationary cone while the effect is reverse for when the cone is rotating in clockwise direction at the highest supped. Higher discrepancies between the average Nusselt number is obtained for 2D cylinder and 3D cylinder configuration which is 28.5% at the highest rotational speed. Even though there are very slight variations between the average Nu values for 3D cylinder and 3D cone case, there are significant variations in the local variation of the average Nusselt number. Higher enhancements in the average Nusselt number are achieved with CNT particles even though the magnetic field reduced the convection and the value is 84.3% at the highest strength of magnetic field. Increasing the permeability resulted in higher local and average heat transfer rates for the 3D porous cavity. In this study, the aspect ratio of the cone was found to be an excellent tool for heat transfer enhancement while 95% enhancements in the average Nusselt number were obtained. The horizontal location of the cone was found to have slight effects on the Nusselt number variations.

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Section: Introductionmentioning

confidence: 99%

Effects of a Rotating Cone on the Mixed Convection in a Double Lid-Driven 3D Porous Trapezoidal Nanofluid Filled Cavity under the Impact of Magnetic Field

2020

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“…Nanofluids' applications are shown today in heat exchangers, impingement jets, renewable energies, heating and tempering processes, automotive industries, electronic cooling, lubrication, medicine, combustion, and so forth. Figure shows the different applications of NF.…”

Section: Introductionmentioning

confidence: 99%

Magnetohydrodynamics convection in nanofluids‐filled cavities: A review

et al. 2020

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This manuscript reviews most of the available papers on the nanofluids convection in different shapes of cavities and enclosures, applying a magnetic field. The papers have been categorized into two major classes: natural convection and mixed convection. Important research have been described more and then two tables demonstrate a summary of the papers. Statistical considerations are mentioned to realize some helpful information on the scope. Most of the results demonstrated that the heat transfer usually enhances with an increase in nanoparticles volume concentration and Rayleigh number and shows inverse behavior with growth in the Hartmann number. The average Nusselt number will decrease with any increase in the Richardson number.Moreover, magnetohydrodynamic constraints the heat transfer and therefore, can play as an applicable controller of heat transfer applications. K E Y W O R D Scavity, mixed convection, nanofluids, natural convection

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“…As described in the above literature review the thermocapillary convection [1][2][3][4][5][6][7][8][9][10] and Magnetohydrodynamic (MHD) convection [26,27] were widely studied. A recent published paper by Al-Rashed et al [28] who studied the effect of an inclined magnetic field on CNT-nanofluid natural convection. In our study a similar configuration based on from the work of the Al-Rashed et al [28] is investigated and the novelty is the consideration of additional effect of surface tension which its intensity is characterized by Marangoni number (Ma).…”

Section: Introductionmentioning

confidence: 99%

“…A recent published paper by Al-Rashed et al [28] who studied the effect of an inclined magnetic field on CNT-nanofluid natural convection. In our study a similar configuration based on from the work of the Al-Rashed et al [28] is investigated and the novelty is the consideration of additional effect of surface tension which its intensity is characterized by Marangoni number (Ma). Except the Marangoni number all the chosen ranges of the parameters governing the phenomenon were inspired from the work of the Al-Rashed et al [28].…”

Section: Introductionmentioning

confidence: 99%

3D Magneto-Buoyancy-Thermocapillary Convection of CNT-Water Nanofluid in the Presence of a Magnetic Field

et al. 2020

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A numerical study is performed to investigate the effects of adding Carbon Nano Tube (CNT) and applying a magnetic field in two directions (vertical and horizontal) on the 3D-thermo-capillary natural convection. The cavity is differentially heated with a free upper surface. Governing equations are solved using the finite volume method. Results are presented in term of flow structure, temperature field and rate of heat transfer. In fact, results revealed that the flow structure and heat transfer rate are considerably affected by the magnitude and the direction of the magnetic field, the presence of thermocapillary forces and by increasing nanoparticles volume fraction. In opposition, the increase of the magnetic field magnitude leads to the control the flow causing flow stabilization by merging vortexes and reducing heat transfer rate.

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Three-dimensional investigation of the effects of external magnetic field inclination on laminar natural convection heat transfer in CNT–water nanofluid filled cavity

Cited by 103 publications

References 44 publications

Effects of a Rotating Cone on the Mixed Convection in a Double Lid-Driven 3D Porous Trapezoidal Nanofluid Filled Cavity under the Impact of Magnetic Field

Effects of a Rotating Cone on the Mixed Convection in a Double Lid-Driven 3D Porous Trapezoidal Nanofluid Filled Cavity under the Impact of Magnetic Field

Magnetohydrodynamics convection in nanofluids‐filled cavities: A review

3D Magneto-Buoyancy-Thermocapillary Convection of CNT-Water Nanofluid in the Presence of a Magnetic Field

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