Effects of half-sinusoidal nonuniform heating during MHD thermal convection in Cu–Al2O3/water hybrid nanofluid saturated with porous media

Biswas, Nirmalendu; Manna, Nirmal K.; Chamkha, Ali J.

doi:10.1007/s10973-020-10109-y

Cited by 82 publications

(48 citation statements)

References 56 publications

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“…Mehryan et al 34 investigated the MHD natural convection of (MWCNT-Fe 3 O 4 ) hybrid nanofluid filled-T-shaped cavity equipped with two distinct porous layers numerically using the Darcy-Brinkman-Forchheimer model. Biswas et al 35 demonstrated the MHD thermal convection of Cu-Al 2 O 3 /water hybrid nanofluid filled square porous cavity subjected to nonuniform heating takes place at the bottom wall and is controlled by a half-sinusoidal function with various frequencies. The findings of this study show that to increase the system's thermal performance, multifrequency heating can be employed, even when porous media and magnetic fields are present.…”

Section: Natural Convection Of Nanofluids In the Porous Mediummentioning

confidence: 99%

Newtonian and non‐Newtonian nanofluids with entropy generation in conjugate natural convection of hybrid nanofluid‐porous enclosures: A review

et al. 2021

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Section: Natural Convection Of Nanofluids In the Porous Mediummentioning

confidence: 99%

Newtonian and non‐Newtonian nanofluids with entropy generation in conjugate natural convection of hybrid nanofluid‐porous enclosures: A review

et al. 2021

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“…The topic of the porous media finds numerous applications in geophysical and environmental systems, for example, biomicrosystems, fuel cells, chemical catalytic convertors, petroleum oil reservoirs, enhanced oil recovery, geothermal energy utilization, thermal energy store, storage of cereals, food industry and pollutant dispersion in aquifers. The growing volume of works on the thermal convection along with primary ideas in this field has been attested in the books by Vafai (2005), Nield and Bejan (2013) and also in recent open literature in Refs (Bég et al , 2017; Biswas et al , 2018; and Manna et al , 2019).…”

Section: Introductionmentioning

confidence: 95%

Magnetohydrodynamic bioconvection of oxytactic microorganisms in porous media saturated with Cu–water nanofluid

Biswas

Manna

Mandal

et al. 2021

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Purpose The purpose of this study is to address magnetohydrodynamic (MHD) bioconvection caused by the swimming of oxytactic microorganisms in a linearly heated square cavity filled with porous media and Cu–water nanofluid. The effects of different multiphysical aspects are demonstrated using local distributions as well as global quantities for fluid flow, temperature, oxygen concentration and microorganisms population. Design/methodology/approach The coupled transport equations are converted into the nondimensional partial differential equations, which are solved numerically using a finite volume-based computing code. The flow of Cu–water nanofluid through the pores of porous media is formulated following the Brinkman–Forchheimer–Darcy model. The swimming of oxytactic microorganisms is handled following a continuum model. Findings The analysis of transport phenomena of bioconvection is performed in a linearly heated porous enclosure containing Cu–water nanofluid and oxytactic microorganisms under the influence of magnetic fields. The application of such a system could have potential impacts in diverse fields of engineering and science. The results show that the flow and temperature distribution along with the isoconcentrations of oxygen and microorganisms is markedly affected by the involved governing parameters. Research limitations/implications Similar study of bioconvection could be extended further considering thermal radiation, chemical attraction, gravity and light. Practical implications The outcomes of this investigation could be used in diverse fields of multiphysical applications, such as in food industries, chemical processing equipment, fuel cell technology and enhanced oil recovery. Originality/value The insight of the linear heating profile reveals a special attribute of simultaneous heating and cooling zones along the heated side. With such an interesting feature, the MHD bioconvection of oxytactic microorganisms in nanofluid-filled porous substance is not reported so far.

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“…However, Nu changes reversely in a turbulent region. Biswas et al [25] investigated MHD thermal convection of Cu-Al 2 O 3 /water hybrid nanofluid inside a porous cavity under the effect of half-sinusoidal non-uniform heating source. Their findings indicated that multi-frequency spatial heating while hybrid nanopowder circulation may be used to intensify the heat efficiency of the system acting under a variety of parameter ranges, even in the existence of porous media and magnetic fields.…”

Section: Introductionmentioning

confidence: 99%

Magnetohydrodynamics Natural Convection of a Triangular Cavity Involving Ag-MgO/Water Hybrid Nanofluid and Provided with Rotating Circular Barrier and a Quarter Circular Porous Medium at its Right-Angled Corner

et al. 2021

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The current paper studied the behavior of a triangular cavity occupied with Ag-MgO/water nanofluid under MHD natural convection and provided with a rotating circular barrier, while the right-angled corner is equipped with quarter-circle porous medium and maintained at a fixed hot temperature T h . Several parameters are tested such as Rayleigh number (10 3 ≤ Ra ≤ 10 6 ), Hartmann number (0 ≤ Ha ≤ 80) and Darcy number (10 −5 ≤ Da ≤ 0.15). The obtained results depict the enhancing effect of Ra and the controlling role of the magnetic parameter on heat transport. Increasing the characteristics of the porous media such as the porosity and the permeability showed a substantial impact on the heat transport efficiency within the enclosure. Moreover, the novelty findings in this paper are principally illustrated in the boosting impact of raising the porous medium thickness when it is associated with the growing up of the heated parts of the geometry by increasing the dimension of the radius (r p ). Also, the rotational velocity (ω) and the radius (r ob ) of the circular obstacle are tested and showed an important influence on the energy transport within the cavity. Moreover, the obtained results by modifying the length (a) prove its pertinent influence on the heat transfer performance.

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Effects of half-sinusoidal nonuniform heating during MHD thermal convection in Cu–Al2O3/water hybrid nanofluid saturated with porous media

Cited by 82 publications

References 56 publications

Newtonian and non‐Newtonian nanofluids with entropy generation in conjugate natural convection of hybrid nanofluid‐porous enclosures: A review

Newtonian and non‐Newtonian nanofluids with entropy generation in conjugate natural convection of hybrid nanofluid‐porous enclosures: A review

Magnetohydrodynamic bioconvection of oxytactic microorganisms in porous media saturated with Cu–water nanofluid

Magnetohydrodynamics Natural Convection of a Triangular Cavity Involving Ag-MgO/Water Hybrid Nanofluid and Provided with Rotating Circular Barrier and a Quarter Circular Porous Medium at its Right-Angled Corner

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