Natural convection of a non-Newtonian ferrofluid in a porous elliptical enclosure in the presence of a non-uniform magnetic field

Garmroodi, M.R. Daneshvar; Ahmadpour, Ali; Hajmohammadi, M.R.; Gholamrezaie, S.

doi:10.1007/s10973-019-09045-3

Cited by 20 publications

(2 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sheremet et al [29] thoroughly investigated the MHD heat convection in a wavy enclosure with a porous medium, and the lower wall has a maximum temperature. Numerous researchers have examined the impact of incorporating porous media within an enclosure for various purposes, as porous materials can enhance or reduce heat transfer [30][31][32]. The flow within a vertical cavity with a wavy shape that was permeated by a porous medium was examined by Aydin et al [33].…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Investigation in Plus-Shaped Enclosure Using Power Law Fluid: A Finite Element Approach

Chuhan,

Li,

Guo

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

The main purpose of this study is to investigate the thermal behavior of power law fluid within a plus-shaped cavity under the influence of natural convection, also taking into account the Darcy number and magnetohydrodynamics (MHD). The problem is formulated as a system of partial differential equations considering the power law fluid’s rheological behavior. The left-side walls are maintained at a specific low temperature while the lower and the right-side walls have uniform maximum temperatures. The boundary condition is designed to enhance heat transfer efficiency within the cavity, utilizing advanced thermal insulation methodologies. Finite element method (FEM) simulations are conducted, and a grid independence test is performed to validate the results. The impact of relevant parameters on the variation in momentum and thermal distributions is investigated using streamline and isothermal contour plots. The results indicate that as the Rayleigh number increases, the kinetic energy also increases, whereas the viscosity and circulation zones expand with an increase in the power law index. The Nusselt number exhibits a higher value in the shear-thinning case (n = 0.7) compared to the Newtonian (n = 1) and shear-thickening (n = 1.2) cases. This empirical observation underscores the vital role that fluid rheology plays in molding the overall heat transfer performance within the cavity. The study concludes that there is a distinct correlation between the heat transfer rate and the Rayleigh number (Ra). As Ra increases, there is a significant improvement in the heat transfer rate within the flow domain. Furthermore, the fluid behavior and heat transfer performance within the cavity are significantly influenced by the presence of magnetohydrodynamics (MHD) and the Darcy effect.

show abstract

Section: Introductionmentioning

confidence: 99%

Heat Transfer Investigation in Plus-Shaped Enclosure Using Power Law Fluid: A Finite Element Approach

Chuhan,

Li,

Guo

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

show abstract

“…Saha [48] analyzed the influence of applied magnetic field on the natural convection flow of an Al 2 O 3 -water nanofluid in a trapezoidal enclosure that contains a solid cylinder. Laminar, convective flow of a non-Newtonian ferrofluid inside an elliptical porous cavity was simulated by Garmroodi et al [49] in the presence of a non-uniform external magnetic field and found that the overall rate of heat transfer increases due to the application of the magnetic field. Moreover, the impact of MHD and porous medium on a mixed convection flow of a nanofluid in a cavity with rotating cylinders was studied by Barnoon et al [50].…”

Section: Introductionmentioning

confidence: 99%

Carreau ferrofluid flow with inclined magnetic field in an enclosure having heated cylinder

2021

View full text Add to dashboard Cite

A two-dimensional laminar flow of a non-Newtonian Carreau ferrofluid under the influence of a uniform inclined magnetic field is considered in a square cavity with a stationary heated cylinder. The objective is to determine the impact of nonlinear variation of the ferrofluid's viscosity with the shear rate on velocity and temperature distributions, localized and average heat transfer, and also on entropy generation. The Boussinesq approximation is assumed to be valid, making the momentum transport sensitive to thermal transport. Solutions are obtained numerically over a refined mesh with a customized OpenFOAM solver, which accounts for the coupling of Navier-Stokes equations with Maxwell equations. Controlling parameters are computed based on the physical properties of the base fluid and nanoparticles. For validation, present solutions are compared with the available published data and are found to be in good agreement with each other. Through a detailed analysis, it is concluded that the inclined magnetic field, volume fraction, and power-law index can sufficiently alter the momentum and thermal fields and, consequently, the local and mean heat transfer rates and the irreversibility generated due to fluid friction, heat transfer, and magnetic field. Particularly, the investigation reveals that the rate of heat transfer can be optimized with the help of the applied magnetic field direction, and in the present situation, the maximum heat transfer rate can be achieved when it is implemented in the vertical direction (Γ = π/2). The average Bejan number, Be avg , computed for the pure fluid and ferrofluid indicate that the irreversibility due to heat transfer is dominant compared to the fluid friction irreversibility.

show abstract

Investigation of MHD free convection of power‐law fluids in a sinusoidally heated enclosure using the MRT‐LBM

et al. 2021

View full text Add to dashboard Cite

show abstract

Natural convection of a non-Newtonian ferrofluid in a porous elliptical enclosure in the presence of a non-uniform magnetic field

Cited by 20 publications

References 49 publications

Heat Transfer Investigation in Plus-Shaped Enclosure Using Power Law Fluid: A Finite Element Approach

Heat Transfer Investigation in Plus-Shaped Enclosure Using Power Law Fluid: A Finite Element Approach

Carreau ferrofluid flow with inclined magnetic field in an enclosure having heated cylinder

Investigation of MHD free convection of power‐law fluids in a sinusoidally heated enclosure using the MRT‐LBM

Contact Info

Product

Resources

About