Effects of inclination angle and non-uniform heating on mixed convection of a nanofluid filled porous enclosure with active mid-horizontal moving

Nithyadevi, N.; Begum, A. Shamadhani; Öztop, Hakan F.; Al‐Salem, Khaled

doi:10.1016/j.ijheatmasstransfer.2016.09.041

Cited by 25 publications

(4 citation statements)

References 31 publications

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“…The governing equations are discretized by using the finite volume method while the coupling between the velocity and pressure fields is done by using the SIMPLE algorithm of Patankar [28]. The diffusion terms in the equations are discretized by central different scheme, while a power law scheme [29][30][31] is applied to approximate the convection terms. The set of discretized algebraic equations are solved by tridiagonal matrix algorithm (TDMA) line by line method.…”

Section: Numerical Approachmentioning

confidence: 99%

Numerical study of magnetohydrodynamic mixed convective flow in a lid-driven enclosure filled with nanofluid saturated porous medium with center heater

2019

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This present numerical study explores the MHD mixed convective flow and heat transfer analysis in a square porous enclosure filled with nanofluid having center thin heater. The left and right walls of the enclosure are maintained at temperature T . The bottom wall is c considered with a constant heat source whereas the remaining part of bottom wall and top wall are kept adiabatic. The finite volume method based on SIMPLE algorithm is used to solve the governing equations in order to investigate the effect of heater length, Hartmann, Richardson, and Darcy numbers on the fluid-flow and heat transfer characteristics inside the enclosure. A set of graphical results are presented in terms of streamlines, isotherms, mid height velocity profiles and average Nusselt numbers. The results reveal that heat transfer rate increases as heater length increases for increasing Darcy and Richardson numbers. Among the two positions of heaters, larger enhancement of heat transfer is obtained for horizontal heater of maximum length. It is observed that, Hartmann number is a good control parameter for heat transfer in fluid-flow through porous medium in enclosure. Moreover, Ag-water nanofluid has greater merit to be used for heat transfer enhancement. This problem may be occurred in designing cooling system for electronic equipment to maximize the efficiency with active and secured operational conditions.

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Section: Numerical Approachmentioning

confidence: 99%

Numerical study of magnetohydrodynamic mixed convective flow in a lid-driven enclosure filled with nanofluid saturated porous medium with center heater

2019

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“…Inclination effects were studied using heat transfer and flow characteristics in a Cu–water nanofluid‐occupied cavity at natural convection regime by Abu‐Nada and Öztop 3 . The angle of inclination has been calculated to serve as a flow‐directing constraint, and by the addition of the nanofluid, the maximum mean Nusselt number is obtained 4 . Then, the flow of mixed convection in an Al 2 O 3 nanofluid‐filled cavity was examined by Abu‐Nada and Chamkha 5 .…”

Section: Introductionmentioning

confidence: 99%

Analysis of mixed convection in an inclined square cavity using nanofluids with Vajjha and Das' nanofluid model

Begum

Chamkha

2021

Heat Trans

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In this article, the effects of angle of inclination on heat transfer by mixed convection have been analyzed numerically in a square cavity packed with a CuO nanofluid. Cavity boundaries are constructed by having sinusoidal varying temperature on sidewalls, inactive horizontal walls, and the hot passing plate at the center of the cavity. The transport equations for fluid and heat are solved using the finite‐volume method with SIMPLE algorithm. The Richardson number (Ri) varying from 0.01 to 100, inclination angle (γ) from 0° to 90°, wall speed ratios (λ) from 0 to 3 and volume fraction of nanoparticles (φ) from 0.0 to 0.1 are given and represented in the form of flow fields, temperature fields, and mean heat transfer graphs. It is detected that the principal flow constraints have a substantial impact on the flow lines and thermal lines. Specifically, the structures of cavity inclination, existence of copper nanoparticles, and the hot wall in motion at the midpoint of the cavity are established to enrich the overall rate of heat transfer. Correspondingly, in the present study, the Vajjha and Das model is taken into account for the effective thermal conductivity and viscosity of the nanofluid; application of this model is beneficial for the industries working in a high‐temperature environment.

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“…Sheikholeslami et al [6] investigated the 3D nanofluid force in the presence of a magnetic field using lattice Boltzmann method. Nithyadevi et al [7] discussed the effect of the angle of inclination on the mixed convection of the nanofluid. Dhananjay et al [8] studied the isothermal boundary condition of the nanoparticles in the presence of Lorentz force.…”

Section: Introductionmentioning

confidence: 99%

Influence of interfacial electrokinetic on MHD radiative nanofluid flow in a permeable microchannel with Brownian motion and thermophoresis effects

et al. 2020

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In this study, the behavior of a microchannel flow is examined. The fluid is considered to be a nanofluid, which moves between two parallel flat plates in the presence of an electrical double layer. The Buongiorno nanofluid is considered with body force. In this study, the unphysical supposition presented in the preceding work to the discontinuity of the flow fled where the electrostatic potential in the central of the canal must be equal to zero is removed. The incorrect supposition that the pressure constant is preserved, which is considered a known form, is corrected. The current fresh model equation is modified by using dimensionless parameters to convert partial differential equations into ordinary differential equations. The transformed nonlinear equations are solved by the homotopy analysis method. The physical parameters, magnetic parameters, Eckert number, Lewis number, Brownian motion parameters, thermophoresis parameters, and Prandtl number are analyzed. The influence of both the viscous and Joule dissipation in the presence of magnetohydrodynamic effect is examined.

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Effects of inclination angle and non-uniform heating on mixed convection of a nanofluid filled porous enclosure with active mid-horizontal moving

Cited by 25 publications

References 31 publications

Numerical study of magnetohydrodynamic mixed convective flow in a lid-driven enclosure filled with nanofluid saturated porous medium with center heater

Numerical study of magnetohydrodynamic mixed convective flow in a lid-driven enclosure filled with nanofluid saturated porous medium with center heater

Analysis of mixed convection in an inclined square cavity using nanofluids with Vajjha and Das' nanofluid model

Influence of interfacial electrokinetic on MHD radiative nanofluid flow in a permeable microchannel with Brownian motion and thermophoresis effects

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