Transient buoyancy-opposed double diffusive convection of micropolar fluids in a square enclosure

Jena, Sofen K.; Malla, Laxman K.; Mahapatra, S.S.; Chamkha, Ali J.

doi:10.1016/j.ijheatmasstransfer.2014.10.030

Cited by 24 publications

(6 citation statements)

References 47 publications

(48 reference statements)

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“…The vorticity-vector potential formulation is employed in order to eliminate the pressure term which is delicate to treat. The Using the above hypothesis, the dimensionless governing equations [23,41,43] are:…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…A few investigators have studied micropolar fluid natural convection in enclosures (Aydin and Pop [20], Zadravec et al [21], Saleem et al [22]). Jena et al [23] has recently investigated transient micropolar double diffusive natural convection for buoyancy-opposing ratio and noticed that a monotonic decrease in the flow strength and heat and mass transfer ratesoccurs due to the vortex viscosity parameter. It should be noted that major researches in literature for the three-dimensional flow of micropolar fluids concerned numerical and/or analytical study of a flow due to stagnation point or stretching flat surface (Agarwal and et al [24], Takhar and al.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Field Effect on the Double Diffusive Natural Convection in Three-Dimensional Cavity Filled with Micropolar Nanofluid

2018

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This article presents a three-dimensional numerical investigation of heat and mass transfers and fluid flow in a cavity filled with an Al 2 O 3 /water micropolar fluid under uniform magnetic field. To solve the governing non-dimensional equations, Finite Volume Method (FVM) based on 3-D vorticity-vector potential formulation has been employed. The effects of various parameters such as buoyancy ratio (−2 ≤ N ≤ 0), Rayleigh number (10 3 ≤ Ra ≤ 10 5 ), Hartmann number (0≤ Ha≤ 60), nanoparticles volume fraction (0 ≤ ϕ ≤ 0.06) and micropolar material parameter (0≤ K≤ 5) on flow structure and on heat and mass transfers are presented. The results illustrate that for the micropolar nanofluid model, both heat and mass transfer rates and three-dimensional character of the flow are smaller when compared with the pure nanofluid model. It is also observed that increase and decrease in heat and mass transfer rates is experienced due to increase in Rayleigh number and Hartmann number, respectively. It is also noted that increase in vortex viscosity parameter reduces the average heat and mass transfer rates and is more evident when the magnetic field is imposed. Combined effects of magnetic field and nanoparticles volume fraction on heat and mass transfers are also explored.

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Section: Mathematical Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetic Field Effect on the Double Diffusive Natural Convection in Three-Dimensional Cavity Filled with Micropolar Nanofluid

2018

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“…It was obtainedthat the local and average Nusselt numbers decrease with the enhancement of the micropolar parameter. Jena et al [30] extracted the numerical solution of the transientbuoyancy-opposed double diffusive natural convection of a micropolar fluid. They observed that the flow strength and heat and mass transfer rates are deteriorated for growing values of the micropolar parameters.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of three-dimensional thermo-solutal convection of micropolar multi-walled carbon nanotubes water nanofluid stabilized by lignin and sodium polycarboxylate

Manaa

Abidi

Estellé

et al. 2021

J Therm Anal Calorim

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A computational analysis has been performed in this study to solve three-dimensional thermo-solutal natural convection in a differentially heated cubical enclosure filled with micropolar CNT-water nanofluid stabilized by two types of surfactants lignin and sodium polycarboxylate. The work is carried out for different pertinent parameters as Rayleigh number (10 4 Ra 10 6 ), micropolar parameter (0 K 10), buoyancy ratio (-1 N 0) and nanoparticles's volume fraction (0.0055% 0.557%).It is observed that the heat and mass transfer rates are lower for a micropolar nanofluid model when compared to the pure nanofluid model. In fact, the enhancement of micropolar parameter results a decrease of average Nusselt and Sherwood numbers. The use of lignin as a surfactant ameliorates heat and mass transfer rate and nanofluid flow better than the use of sodium polycarboxylate as a surfactant. The nanoparticles volume fraction can be used as a control element for heat rate and fluid flow. Thus, for a nanoparticles volume concentration less than the critical value, the flow intensity is ameliorated and is deteriorated when it exceed this value.

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“…Bourantas and Loukopoulos ( 2014) have introduced the theory of the natural convective flow of a micropolar nanofluids in a square cavity. The influence of the transient buoyancy-opposed double diffusive free convection of a micropolar fluids within a square enclosure has been described by Jena et al (2015). More recently, the impact of non-uniform heat source on free convective flow of a micropolar fluid have been considered by Muthtamilselvan et al (2017).…”

Section: Introductionmentioning

confidence: 99%

Influence of Heat and Mass Transfer on Free Convection of Micropolar Fluid between Vertical Concentric Cylinders

Singh

2019

JAFM

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Natural convective flow of a micropolar fluid is examined analytically in order to see the effect of heat and mass transfer between two concentric vertical cylinders of infinite length. The governing equations of model in non-dimensional form corresponding to the temperature, velocity and microrotational velocity, using the Boussinesq approximation and Eringen equation with suitable boundary conditions are expressed in terms of cylindrical coordinate system and then their exact solutions are obtained. The influence of the nondimensional physical parameters such as the material and vortex viscosity parameters on the velocity, microrotational velocity is evaluated by showing on the graphs while the values of skin friction in nondimensional form at the outer and inner surfaces of inner and outer cylinders have been presented in the tabular form.

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Transient buoyancy-opposed double diffusive convection of micropolar fluids in a square enclosure

Cited by 24 publications

References 47 publications

Magnetic Field Effect on the Double Diffusive Natural Convection in Three-Dimensional Cavity Filled with Micropolar Nanofluid

Magnetic Field Effect on the Double Diffusive Natural Convection in Three-Dimensional Cavity Filled with Micropolar Nanofluid

Numerical simulation of three-dimensional thermo-solutal convection of micropolar multi-walled carbon nanotubes water nanofluid stabilized by lignin and sodium polycarboxylate

Influence of Heat and Mass Transfer on Free Convection of Micropolar Fluid between Vertical Concentric Cylinders

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