Mixed convection heat transfer in a CuO–water filled trapezoidal enclosure, effects of various constant and variable properties of the nanofluid

Arefmanesh, A.; Aghaei, Alireza; Ehteram, Hamidreza

doi:10.1016/j.apm.2015.10.043

Cited by 50 publications

(22 citation statements)

References 37 publications

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“…al. [18]. The results indicated that the differences between the average Nusselt number and the entropy generation obtained using the different considered variable-property models decrease with increasing the nanoparticles volume fraction.…”

Section: Introductionmentioning

confidence: 88%

Mixed convection of functionalized DWCNT-water nanofluid in baffled lid-driven cavities

et al. 2018

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The present study aims to evaluate the mixed convection flow and heat transfer of functionalized DWCNT/water nanofluids with variable properties in a cavity having hot baffles. The investigation is performed at different nanoparticles volume fraction including 0, 0.0002, 0.001, 0.002, and 0.004, Richardson numbers ranging from 0.01 to 100, inclination angles ranging from 0 to 60° and at constant Grashof number of 10 4 . The results presented as streamlines and isotherms plot and Nusselt number diagrams. According to the finding with increasing nanoparticles volume fraction and distance between the left hot baffles of nanoparticles average Nusselt number enhances for all considered Richardson numbers and cavity inclination angles. Also with increasing Richardson number, the rate of changes of average Nusselt number increase with increasing distance between the left hot baffles. For example, at Richardson number of 0.01, by increasing L 1 from 0.4 to 0.6, the average Nusselt number increases 7%; while for similar situation at Richardson number of 0.1, 1.0, and 10, the average Nusselt number increases, respectively, 17%, 24%, and 26%. At all Richardson numbers, the maximum value of average Nusselt number is achieved for a minimum length of left baffles.

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Section: Introductionmentioning

confidence: 88%

Mixed convection of functionalized DWCNT-water nanofluid in baffled lid-driven cavities

et al. 2018

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“…[22], Arefmanesh et al. [23], Selimefendigil and Öztop [24] and Sheremet et al. [25] and Miroshnichenko et al.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of natural convective heat transport of copper oxide-water nanofluid flow inside a quadrilateral vessel

Uddin

Rasel

2019

Heliyon

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Nanofluid based heat transfer approaches have a tremendous prospect to develop novel cost-effective cooling technologies. In response to this potential development, a problem of unsteady copper oxide-water nanofluid flow and natural convective heat transfer within a quadrilateral vessel with uniform heating of bottom wall using modified Buongiorno model are investigated. The sloping wall of the vessel is maintained at constant low temperature and the uniform thermal condition on the bottom heated wall is considered, whereas the upper horizontal wall is regarded as adiabatic. The governing equations along with boundary conditions are solved using the Galerkin finite element method. Partial differential equation solver COMSOL Multiphysics with Matlab interface is used in the simulation. The results of the present problem of a certain situation as a special case have been verified by the previously published standard numerical investigations. The flow, thermal and concentration fields, local and average Nusselt number for various pertinent parameters entered into the problem have been analyzed. The time evolutions for a steady-state solution are also examined. The results show that the adjustment factor with the optimal nanoparticle volume fraction and the thermal Rayleigh number controls the optimal heat transfer. The trapezoidal vessel having higher sloping angles with the vertical axis exhibits higher heat transfer. Heat transfer decreases rapidly in 1–10 nm size nanoparticles for a nanofluid solution.

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“…Foremost, Choi [1] proved that the thermal conductivity of traditional fluids can be radically augmented by suspending the macro/nano sized particles of metal uniformly into the traditional fluids. This concept incited many researchers towards nanofluids, and numerous investigations were carried out to analyze the applications and thermo-physical properties of nanofluids [2][3][4][5][6][7][8][9][10][11][12]. Further, the experimental or theoretical analysis of magnetohydrodynamic (MHD) flow over the permeable and non-permeable stretching sheets has been vigorously done by several researchers owing to its enormous relevance in modern industry such as in heat storage systems, oil recovery techniques, production of emollient, fiber and wire coating, elastic polymer substance, chemical equipment processing, thermal insulations, manufacturing of uniform and long metal parts, etc.…”

Section: Introductionmentioning

confidence: 99%

Thermal radiation impact on boundary layer dissipative flow of magneto-nanofluid over an exponentially stretching sheet

Hussain¹,

Sharma²,

Seth³

et al. 2018

IJHT

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The impact of thermal radiation on viscous dissipative boundary layer flow of heat absorbing magneto-nanofluid over a permeable exponentially stretching sheet with Navier's velocity and thermal slips has been analyzed. The prevailing mathematical equations are changed to nonlinear ordinary differential equations using the appropriate similarity variables and then the equations are numerically solved by Runge-Kutta scheme of fourth order together with the shooting technique. Three kinds of water based nanofluids having aluminum oxide, copper and titanium oxide as nanoparticles are considered for this investigation. The consequence of relevant flow parameters on nanofluid velocity, temperature distribution, wall velocity gradient and local Nusselt number are displayed by means of various graphs. In addition, analysis of quadratic regression estimation on the numerical data of coefficient of skin friction and local Nusselt number has been presented to verify the relationship among the controlling physical parameters and transfer rate parameters. Our result reveals that the velocity and temperature distribution profiles are lower for Cu-water nanofluid followed by Al2O3 and TiO2 water base nanofluids in the regime of boundary layer. The thermal radiation and viscous dissipation have tendency to augment the Cu-water temperature over the stretching sheet.

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Mixed convection heat transfer in a CuO–water filled trapezoidal enclosure, effects of various constant and variable properties of the nanofluid

Cited by 50 publications

References 37 publications

Mixed convection of functionalized DWCNT-water nanofluid in baffled lid-driven cavities

Mixed convection of functionalized DWCNT-water nanofluid in baffled lid-driven cavities

Numerical analysis of natural convective heat transport of copper oxide-water nanofluid flow inside a quadrilateral vessel

Thermal radiation impact on boundary layer dissipative flow of magneto-nanofluid over an exponentially stretching sheet

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