On the magnetohydrodynamic natural convective alumina nanofluidic transport inside a triangular enclosure fitted with fins

Acharya, Nilankush

doi:10.1016/j.jics.2022.100784

“…The extending rotary cylinder produces the whirling flow. Acharya 27 – 32 evaluated the mass and heat transport through hybrid nano liquid stream through the various interesting geometries like square enclosure, triangular cavity, inclined revolving disk, revolving sphere, and circular cylinder which have many applications in real life and especially in engineering domains. Mohyud-Din et al 33 examined the impacts of chemical processes and heat transport over the flow of nanofluid through permeable walls and asymmetric channels.…”

Section: Introductionmentioning

confidence: 99%

A proceeding to numerical study of mathematical model of bioconvective Maxwell nanofluid flow through a porous stretching surface with nield/convective boundary constraints

Imran,

Basit,

Yasmin

et al. 2024

Sci Rep

10

0

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Nanofluids become significant in the mass and heat transfer models, especially in engineering problems. Current proceedings focused on the bioconvective Maxwell nanofluid flow passing through the permeable stretchable sheet contingent to nield boundary conditions involving effects of activation energy and thermal radiation. Various physical quantities are involved in this mechanism like magnetic field, thermophoresis, and Brownian motion. The main objective of the study is to report the heat and mass transport in the existence of motile microorganisms. In a mathematical perspective, this structured physical model is going to govern with the help of partial differential equations (PDEs). These governing PDEs are then converted into dimensionless ordinary differential equations form by utilizing appropriate similarity transformations. For numerical results, the shooting technique with ‘bvp4c’ built-in package of MATLAB was implemented. Computed results are then visualized graphically and discussed effects of involving physical variables on the nano-fluid flow profiles are comprehensively. From results, it has been concluded that the fluid flow velocity, temperature, concentration, and microorganism density profiles show escalation on increasing the numeric values of porosity, thermophoresis, buoyancy ratio, bioconvection Rayleigh, Peclet number parameters and decrement reported due to increasing the counts of Prandtl number, magnetic field, radiation, Brownian motion, Lewis number as evident from figures. The numerical outcomes observed by fixing the physical parameters as $$0.1 < \lambda < 3.0$$ 0.1 < λ < 3.0 , $$0.1 < M < 1.5$$ 0.1 < M < 1.5 , $$0.1 < Nr < 6.0$$ 0.1 < N r < 6.0 , $$0.1 < Rb < 1.5$$ 0.1 < R b < 1.5 , $$0.1 < Nb < 6.0$$ 0.1 < N b < 6.0 , $$0.1 < Nt < 1.0$$ 0.1 < N t < 1.0 , $$2.0 < \Pr < 2.9$$ 2.0 < Pr < 2.9 , $$0.1 < Rd < 0.4$$ 0.1 < R d < 0.4 . Magnetic field and Brownian motion create retardation impact due to the liquid momentum. In tables, the numerical values of Skin friction, Nusselt number, Sherwood number, and microorganisms density number are presented and also comparison table of our computed results and already published results is included for the validation.

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“…Several studies have used enclosures and square cavities of different aspect ratios and sizes in the past few years, including entropy generation, 29–33 heat transmission, 34–39 and MHD effects 40–43 …”

Section: Introductionmentioning

confidence: 99%

“…Several studies have used enclosures and square cavities of different aspect ratios and sizes in the past few years, including entropy generation, [29][30][31][32][33] heat transmission, [34][35][36][37][38][39] and MHD effects. [40][41][42][43] This research aims to examine and evaluate the natural convection in the cavity of a square containing square obstacles. Four cases will be examined, the first case contains one square obstacle, the second case contains two square obstacles, the third case contains three square obstacles, and the last case contains four square obstacles to find the best heat exchange and the best position of the square obstacles inside the cavity, using copper nanoparticles (Cu) and aluminum oxide particles (Al 2 O 3 ) and the base liquid (water) as a coolant.…”

Section: Introductionmentioning

confidence: 99%

Obstacle's effects and their location inside the square cavity on the thermal performance of Cu–Al₂O₃/H₂O hybrid nanofluid

Hachichi

¹

,

Belghar

²

,

Chadi

³

et al. 2023

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The current study focuses on the effect of obstacles and their positioning within the square cavity (L = H) on heat exchange. This work considers heating the cavity's bottom wall to a steady, high temperature. The top wall of the cavity is adiabatic, while the two vertical side walls are cooled. Four cases are explored under these conditions: the first case is a square‐shaped cavity holding a square‐shaped obstacle h = l = 0,15 L, while the other three cases, respectively, each include two, three, and four square obstacles. The cavity was filled with Cu–Al2O3/H2O hybrid nanofluid with a volume fraction φ = 0.03. Numerical results for laminar and stationary flow regimes with Rayleigh numbers 104 ≤ Ra ≤ 106. The finite volume approach solves the governing equations numerically. The findings show that the number of square obstacles within the square‐shaped cavity significantly impacts heat exchange and hybrid nanofluid flow. The second example, with two square obstacles, improves heat exchange more than other cases with one to four barriers. In the second example, the obstacle location at the plane Y = 0.25H is suitable and helps boost heat transmission of the hybrid nanofluid. The ideal obstacle position in the fourth scenario, which has four square barriers, is at the plane Y = 0.75H.

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“…Acharya 13 focuses on the computational study of a hybrid nanofluidic stream of Ag-MgO water that is magnetized and enclosed in a cube-shaped container having a circular cylinder inserted inside. Acharya 14 conducted research on MHD natural convection nanofluidic transport within a fin-equipped three-cornered cage. This study sheds information on the relationship between fin length and hydrothermal behavior inside a container.…”

mentioning

confidence: 99%

Magnetohydrodynamic bioconvective flow past an elongated surface with convective heat transport, and velocity slip in a non‐Darcian porous regime

Das,

Patgiri

2024

Heat Trans

0

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In recent times, bioconvection has numerous uses, like, biological and biotechnological problems. The present study describes the magnetic bioconvective Buongiorno's flow model with microorganisms in a stretchable area with convective heat transfer and second‐order velocity slip in a non‐Darcian porous regime. Here, the influence of variable viscosity, viscous dissipation, Joule heating, and heat source/sink are considered in the occurrence of higher‐order chemical reactions. Employing proper similarity transformations leading equations are transformed to dimension‐free form. The transformed equations are solved via MATLAB bvp4c problem solver. This study's main objective is to graphically analyze the effects of different pertinent factors on the density of motile microorganisms, velocity, concentration, temperature, number of motile microorganisms' density, skin friction, mass transport rate, and heat transport rate. The main findings drawn from this study are viscosity and magnetic parameter lowers the fluid velocity. Biot number increases fluid temperature, but reduces heat transport rates and skin friction. Schmidt and Eckert numbers reduce the fluid concentration. A rise of 0.3 in bioconvective Rayleigh number and 0.2 in buoyancy ratio number causes a percentage drop in velocities of 8.79% and 3.91% (approximately), respectively, in the neighborhood of the sheet. Furthermore, the increase in Peclet number by 0.2 lowers the density number of microorganisms by 28%. Additionally, the profile of motile microorganisms is improved by thermophoresis impact, while it is diminished by chemical reaction.

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On the magnetohydrodynamic natural convective alumina nanofluidic transport inside a triangular enclosure fitted with fins

Cited by 32 publications

References 60 publications

A proceeding to numerical study of mathematical model of bioconvective Maxwell nanofluid flow through a porous stretching surface with nield/convective boundary constraints

A proceeding to numerical study of mathematical model of bioconvective Maxwell nanofluid flow through a porous stretching surface with nield/convective boundary constraints

Obstacle's effects and their location inside the square cavity on the thermal performance of Cu–Al₂O₃/H₂O hybrid nanofluid

Magnetohydrodynamic bioconvective flow past an elongated surface with convective heat transport, and velocity slip in a non‐Darcian porous regime

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On the magnetohydrodynamic natural convective alumina nanofluidic transport inside a triangular enclosure fitted with fins

Cited by 32 publications

References 60 publications

A proceeding to numerical study of mathematical model of bioconvective Maxwell nanofluid flow through a porous stretching surface with nield/convective boundary constraints

A proceeding to numerical study of mathematical model of bioconvective Maxwell nanofluid flow through a porous stretching surface with nield/convective boundary constraints

Obstacle's effects and their location inside the square cavity on the thermal performance of Cu–Al2O3/H2O hybrid nanofluid

Magnetohydrodynamic bioconvective flow past an elongated surface with convective heat transport, and velocity slip in a non‐Darcian porous regime

Contact Info

Product

Resources

About

Obstacle's effects and their location inside the square cavity on the thermal performance of Cu–Al₂O₃/H₂O hybrid nanofluid