Joule Heating Effect on MHD Combined Convection in a Wavy Chamber Having Conducting Square Cylinder

Nasrin, Rehena

doi:10.3329/jsr.v4i1.8014

Cited by 10 publications

(5 citation statements)

References 15 publications

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“…The heat and flow exchange properties in a new configuration saturated with a Ag–MgO hybrid nanofluid were explored numerically by Hussain et al 22 . Nasrin 23 investigated MHD combined convective flow into the wavy cavity by account of Joule heating. Bhardwaj et al 24 performed an exploration of natural convective temperature disposal with entropy generation into a triangle-shaped cavity.…”

Section: Introductionmentioning

confidence: 99%

Heat generation/absorption effect on natural convective heat transfer in a wavy triangular cavity filled with nanofluid

Islam,

Alam,

Niazai

et al. 2023

Sci Rep

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This study is numerically executed to investigate the influence of heat generation or absorption on free convective flow and temperature transport within a wavy triangular enclosure filled by the nanofluid taking the Brownian effect of nanoparticles. The water (H2O) is employed as base fluid and copper (Cu) as nanoparticles for making effective Cu–H2O nanofluids. The perpendicular sinusoidally wavy wall is cooled at low temperature while the horizontal bottom sidewall is heated non-uniformly (sinusoidal). The inclined wall of the enclosure is insulated. The governing dimensionless non-linear PDEs are executed numerically with the help of the Galerkin weighted residual type finite element technique. The numerically simulated results are displayed through average Nusselt number, isothermal contours, and streamlines for the various model parameters such as Hartmann number, Rayleigh number, heat generation or absorption parameter, nanoparticles volume fraction, and undulation parameter. The outcomes illustrate that the temperature transport rate augments significantly for the enhancement of Rayleigh number as well as nanoparticles volume fraction whereas reduces for the increment of Hartman number. The heat transfer is significantly influenced by the size, shape, and Brownian motion of the nanoparticles. The rate of heat transport increases by 20.43% considering the Brownian effect for 1% nanoparticle volume. The thermal performance increases by 8.66% for the blade shape instead of the spherical shape of nanoparticles. In addition, heat transfer is impacted by the small size of nanoparticles. The thermal transport rate increases by 35.87% when the size of the nanoparticles reduces from 100 to 10 nm. Moreover, the rate of heat transmission increases efficiently as the undulation parameter rises. It is also seen that a crucial factor in the flow of nanofluids and heat transmission is the heat generation/absorption parameter that influences temperature distribution, heat transfer rates, and overall thermal performance.

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Section: Introductionmentioning

confidence: 99%

Heat generation/absorption effect on natural convective heat transfer in a wavy triangular cavity filled with nanofluid

Islam,

Alam,

Niazai

et al. 2023

Sci Rep

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“…The dimensionless governing equations for transient natural convection in a sand grain in terms of the Navier-Stokes and energy equation are given as [23][24][25]:…”

Section: Model Definitionmentioning

confidence: 99%

Terminal Falling Characteristics of a Sand Grain with Dufour and Soret Effects

Nasrin

Alim

2012

J. Sci. Res.

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The transient effect of double diffusive natural convection of flow in a differentially heated sand grain with Soret and Dufour coefficients is studied numerically. The right vertical wall has constant temperature T c . The lower inlet opening is heated uniformly with fixed temperature T h and the velocity at the inlet of the fluid domain is set to the falling velocity V i . The condition T h > T c is maintained all over the domain. The concentration in right wall is maintained higher than inlet opening (C c < C h ). The governing equations are solved numerically subject to appropriate boundary conditions by a penalty finite-element method. Solutions are obtained for fixed Prandtl number (Pr = 1.73), Rayleigh number (Ra = 10 4 ), Dufour coefficient (D f = 0.5) and Soret coefficient (S r = 0.5). Transient analysis of the streamlines, isotherms, iso-concentration, falling velocity and forces on sand grain, the local and average Nusselt number and Sherwood number, temperature and concentration at subdomain centre as well as average form, subdomain horizontal and vertical velocities are presented graphically. It is found that the rate of heat transfer and mass transfer in the sand grain enhances and reduces respectively for shorter time periods and then they become almost steady.

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“…The author showed that maximum rate of heat transfer is observed for the lowest aspect ratio AR owing to the shortest distance between the hot and cold surfaces. Also, Joule heating effect on MHD combined convection in a wavy chamber having conducting square cylinder was studied by Nasrin [16]. On the basis of the literature review, it appears that no work was reported on mixed convection in an octagonal channel with heat generating circular block.…”

Section: Introductionmentioning

confidence: 99%

Effects of Reynolds and Prandtl Number on Mixed Convection in an Octagonal Channel with a Heat-Generating Hollow Cylinder

Parvin

Nasrin

2012

J. Sci. Res.

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Joule Heating Effect on MHD Combined Convection in a Wavy Chamber Having Conducting Square Cylinder

Cited by 10 publications

References 15 publications

Heat generation/absorption effect on natural convective heat transfer in a wavy triangular cavity filled with nanofluid

Heat generation/absorption effect on natural convective heat transfer in a wavy triangular cavity filled with nanofluid

Terminal Falling Characteristics of a Sand Grain with Dufour and Soret Effects

Effects of Reynolds and Prandtl Number on Mixed Convection in an Octagonal Channel with a Heat-Generating Hollow Cylinder

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