MHD mixed convection and entropy generation of water–alumina nanofluid flow in a double lid driven cavity with discrete heating

Hussain, Shafqat; Mehmood, Khalid; Sagheer, Muhammad

doi:10.1016/j.jmmm.2016.06.006

Cited by 106 publications

(31 citation statements)

References 50 publications

(52 reference statements)

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“…The consideration of corner heating for closed cavities has been reported in a number of works [10][11][12][13]. Other notable works in MHD convective flow can be found in Hussain et al [14] and Gibanov et al [15]. Very recently, Chamkha et al [16] studied MHD convective heat transfer of Cu-water nanofluid saturated porous medium considering heat generation/absorption.…”

Section: Introductionmentioning

confidence: 99%

MHD convection in a partially driven cavity with corner heating

2019

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The paper presents a pertinent modification to the wall-moving thermal systems (classically represented by lid-driven cavity) by introducing a partial motion of the boundary walls. The effect of partial wall motion is investigated under magnetohydrodynamic (MHD) mixed convection in the cavity filled with porous medium. The corner heating arrangement is chosen for this investigation. The heater is placed at the right-bottom corner of the cavity, whereas the halves of the adjacent sides (which are moving) of the top-left corner are utilized for cooling. The present MHD thermofluid flow in porous cavity under partially driven condition is solved numerically using Brinkman-Forchheimer-Darcy model and analyzed using heatlines, streamlines, isotherms and average Nusselt number. The detailed insights of partially driven cavity are captured for different values of Richardson number (Ri = 0.1-100), Reynolds number (Re = 10-500), Hartmann number (Ha = 0-100), Darcy number (Da = 10 −7 to 10 −3) and porosity (ε = 0.1-1.0). The result reveals that the partial wall motion and its direction have a significant impact on the thermofluid flow structures and heat transfer rate.

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Section: Introductionmentioning

confidence: 99%

MHD convection in a partially driven cavity with corner heating

2019

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“…The numerical simulation of mixed convection with MHD done by Selimefendigil et al [7] keeping side walls of the enclosure elastic in nature and with heat generation concludes that heat transfer is affected by the change in parameters like Ha, Rayleigh number (Ra) and volume percentage of nanoparticles. The study of the generation of entropy is done by Hussain et al [8] where the fluid is under the combined influence of forced and free convection shows that for a fixed Ri as Hartmann number increases average Nu and entropy generation decreases. Gangawane et al [9] located a heated triangular shaped block at the centreline at three positions and their solution tells that heat transfer inside the system is enhanced when high Prandtl number (Pr) fluids are used.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Magneto-Hydrodynamics Mixed Convection in a Square Cavity for Various Shaped Conducting Obstacles Placed at the Center

Alam¹,

Bora²,

Sharma³

et al. 2019

MMEP

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A numerical study of mixed convection in a square enclosure from a heating element to a cold moving wall is performed under the isothermal heating conditions. The heater is placed at the bottom boundary and the cold upper wall moves horizontally towards right side with constant velocity. The lateral walls are insulated. The study includes the thermal performance of nanofluid for various shaped obstacles kept at center of the enclosure. The application of hydro-magnetism with uniform and constant magnetic intensity throughout the bottom wall is considered. The heat convection is studied at two Richardson number (0.01 and 10), four percentage volume of silver nanoparticles (0%, 2%, 5%, and 8%) and four Hartmann number (0, 10, 20, and 50). Grashof number, Prandtl number, and Reynolds number have a constant value of 104, 6.2 and 100 respectively. The obtained results indicate the suppression of heat fluxes with increasing intensity of magnetic field whereas it increases with increasing Richardson number and percentage volume of the nano-material in the base fluid.

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“…He found that increasing each or both Hartmann or Eckert numbers would result in reduced heat transfer rate. Hussain et al [18] surveyed the entropy generation rate in a double lid driven Nanofluid filled cavity. In this numerical modeling the cavity was partially heated and under an inclined magnetic field.…”

Section: Introductionmentioning

confidence: 99%

“…In a further study, Hussain et al [19] studied the impact of the magnetic field inclination angle changes on heat transfer. Modeling conditions were the same as their previous numerical study [18] and heat transfer parameters including the mean Nusselt number, entropy generated rate by heat transfer, total entropy generation, Bejan number, Kinetic energy, fluid friction and magnetic field were calculated against different inclination angles. A quite interesting 3-D numerical modeling of heat transfer was held by Ghachem et al [20].…”

Section: Introductionmentioning

confidence: 99%

Different shapes of Fe3O4 nanoparticles on the free convection and entropy generation in a wavy-wall square cavity filled by power-law non-Newtonian nanofluid

Hatami¹

2018

IJHT

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The goal of this paper is to investigate the influences of Nanoparticles volume fraction, Nanoparticles shape, amplitude and wavelength of wavy surface, Hartmann number and the Angle of magnetic field on the Nusselt number, Bejan number and the entropy generation rate in a wavy wall cavity, numerically. The nanoparticles are considered Fe3O4 which are magnetic in presence of magnetic and the base fluid is considered as a power-law non-Newtonian nanofluid which its density variation is approximated by the standard Boussinesq model. The wavy wall is maintained in low temperatures while the right wall has high temperature and up/down walls is insulated. The problem is solved by finite element method using FlexPDE commercial code and found that the highest average Nusselt number is observed for the Nanofluid with brick shaped particles; however, the Nanofluid with spherical shaped particles is found to have the lowest Nusselt. Furthermore, Minimum and maximum Bejan numbers were observed for brick and spherical nanoparticles, respectively.

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MHD mixed convection and entropy generation of water–alumina nanofluid flow in a double lid driven cavity with discrete heating

Cited by 106 publications

References 50 publications

MHD convection in a partially driven cavity with corner heating

MHD convection in a partially driven cavity with corner heating

Numerical Investigation of Magneto-Hydrodynamics Mixed Convection in a Square Cavity for Various Shaped Conducting Obstacles Placed at the Center

Different shapes of Fe3O4 nanoparticles on the free convection and entropy generation in a wavy-wall square cavity filled by power-law non-Newtonian nanofluid

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