Numerical simulations and linear stability analysis of mixed thermomagnetic convection through two lid-driven entrapped trapezoidal cavities enclosing ferrofluid saturated porous medium

Mehmood, Ziafat

doi:10.1016/j.icheatmasstransfer.2019.104345

Cited by 26 publications

(13 citation statements)

References 35 publications

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“…It is found that the increase in Rayleigh number shows more robust circulation and dominant convection effect in the enclosure. Similarly, the study of mixed convection in a two‐sided lid‐driven trapezoidal cavity has been done by Mehmood 33 . Later, Turan et al 34 supervised a computational study of the free convection for non‐Newtonian fluid inside the differentially heated cavity for a range of pertinent parameters (0.6 ≤ n ≤ 1.8; 10 3 ≤ Ra ≤ 10 6 ; 10 ≤ Pr ≤ 10 5 ).…”

Section: Introductionmentioning

confidence: 99%

A numerical study of mixed convection in a two‐sided lid‐driven tall cavity containing a heated triangular block for non‐Newtonian power‐law fluids

2021

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The study of hydrodynamics and thermal characteristics inside a lid‐driven cavity has been one of the most captivating problems in computational fluid dynamics. In this numerical work, the mixed convection phenomenon inside a two‐dimensional, tall lid‐driven cavity with top and bottom lids moving in opposite directions, +x and –x, respectively, has been explored for non‐Newtonian power‐law fluids. The cavity contains a uniformly heated equilateral triangular obstacle at its geometric center. Numerical experimentation is performed for a range of flow governing parameters, such as aspect ratio (0.25, 0.5, and 0.75), Prandtl number (1, 50, and 100) Richardson number (0.1, 1, and 10), power‐law index (0.6–1.4) and Grashof number of 104. The physical perceptions of the cavity are explained by using streamline and isotherm contours. The fluid movement is limited adjacent to the moving wall concerning the Richardson number at the lower Prandtl number. With a rise in the aspect ratio of the cavity, the flow‐pattern becomes more dispersed inside the cavity. Heat transfer enhancement is observed at a lower aspect ratio equal to 0.25.

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Section: Introductionmentioning

confidence: 99%

A numerical study of mixed convection in a two‐sided lid‐driven tall cavity containing a heated triangular block for non‐Newtonian power‐law fluids

2021

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“…Authors in Reference [28] examined mixed convection through an isosceles triangular cavity enclosing micropolar nanofluid when a uniform magnetic field is applied along the x ‐axis. Authors in Reference [29] investigated presents computational results for mixed convective heat flow through porous medium within two entrapped trapezoidal cavities filled with kerosene–cobalt ferrofluid placed under the influence of magnetic field. Authors in Reference [30] explored numerical simulations for energy flow by mixed convection under the impact of MHD through ferrofluid saturating porous media contained in a trapezoidal enclosure having triangular notched heater at the bottom wall when the container's top boundary is in motion with constant speed.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of natural convection heat transfer from a heated square cylinder in a square cavity filled with micropolar fluid

2021

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A numerical investigation has been performed to visualize the magnetohydrodynamic natural convective heat transfer from a heated square cylinder situated within a square enclosure subjected to nonuniform temperature distributions on the left wall. The flow inside the enclosure is unsteady, incompressible, and laminar and the working fluid is micropolar fluid with constant Prandtl number (Pr = 7). The governing equations of the flow problem are the conservation of mass, energy, and linear momentum, as well as the angular momentum equations. Governing equations formulated in dimensionless velocity and pressure form has been solved by Marker and Cell method with second‐order accuracy finite difference scheme. Comprehensive verification of the utilized numerical method and mathematical model has shown a good agreement with numerical data of other authors. The results are discussed in terms of the distribution of streamlines and isotherms and surface‐averaged Nusselt number, for combinations of Rayleigh number, Ra (103–106), Vortex viscosity parameter, K (0–5), and Ha parameter (0–50). It has been shown that an increase in the vortex viscosity parameter leads to attenuation of the convective flow and heat transfer inside the cavity.

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“…It was found that Hartmann's number and the magnetic field orientation harm convection, leading to the reduction of heat transfer rate. Another work of mixed convective heat flow was investigated by Mehmood [25] on two entrapped trapezoidal cavities filled with ferrofluid. The cavities were placed under the influence of the magnetic field.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Internal Heat Generation or Absorption on Mixed Convection in a Lid-Driven Rectangular Cavity using Finite Volume Method

Bakar

Roslan

Akhir³

2020

CFDL

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Mixed convection heat transfer in cavities is a significant phenomenon in numerous engineering fields, such as nuclear reactors, solar energy storage, and heat exchangers. Despite acknowledging that a square is a basic shape found in these systems, not all the figures are geometrical. Less attention was given to the rectangle cavity even though it could be found in these systems. Various internal reactions could occur inside the systems, especially in geothermal heat exchangers. Therefore, this research aims to analyze the effect of internal heat generation or absorption in a two-dimensional (2D) horizontal cavity to the fluid flow and heat transfer process numerically. The vertical walls are well insulated. Meanwhile, the top and bottom walls are kept at and , respectively, where . The top wall moves at a constant speed from left to right. The finite volume method (FEM) and SIMPLE algorithm are employed to discretize the governing equations. Next, the algebraic equations are solved iteratively using the tri-diagonal matrix algorithm (TDMA). The influences of heat generation or absorption parameters are investigated in terms of the flow, heat transfer, and Nusselt number. The numerical results are plotted in the form of streamlines and isotherms. It is found that the presence of heat generation or absorption has a significant effect on the fluid flow and heat transfer process in the horizontal cavity. Overall, for internal heat generation, the heat transfer rate decreases, while the opposite pattern can be observed for the case of internal heat absorption. However, for Ri = 10.0, as the heat generation's value increases from 2 to 4, the heat transfer rate is the same.

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Numerical simulations and linear stability analysis of mixed thermomagnetic convection through two lid-driven entrapped trapezoidal cavities enclosing ferrofluid saturated porous medium

Cited by 26 publications

References 35 publications

A numerical study of mixed convection in a two‐sided lid‐driven tall cavity containing a heated triangular block for non‐Newtonian power‐law fluids

A numerical study of mixed convection in a two‐sided lid‐driven tall cavity containing a heated triangular block for non‐Newtonian power‐law fluids

Numerical simulation of natural convection heat transfer from a heated square cylinder in a square cavity filled with micropolar fluid

The Effects of Internal Heat Generation or Absorption on Mixed Convection in a Lid-Driven Rectangular Cavity using Finite Volume Method

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