Cooling enhancement of two fins in a horizontal channel by nanofluid mixed convection

Pishkar, Iman; Ghasemi, Behzad

doi:10.1016/j.ijthermalsci.2012.04.015

Cited by 32 publications

(13 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…indicates the slip coefficient. By showing equation (17) in dimensionless form, hydrodynamic boundary condition along the walls is derived as…”

Section: Hydrodynamic Boundary Conditionsmentioning

confidence: 99%

“…14 In several other works, different aspects of nanofluid flow such as consideration of the nanofluid mixture as a two-phase substance or turbulence forced convection of nanofluid were investigated. [15][16][17][18] Present work aims to simulate a microflow through a microchannel. Fluid flow and heat transfer at microscales are different from macroscales level, as a result a succinct description of a microchannel flow is presented in below.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic field effects on the slip velocity and temperature jump of nanofluid forced convection in a microchannel

Karimipour

Afrand

2015

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

Forced convection of water–Cu nanofluid in a two-dimensional microchannel is studied numerically. The microchannel wall is divided into three parts. The entry and exit ones are kept insulated while the middle one has more temperature than the inlet fluid. The whole of microchannel is under the influence of a magnetic field with uniform strength of B0. Slip velocity and temperature jump are involved along the microchannel walls for different values of slip coefficient such as B = 0.001, B = 0.01, and B = 0.1 for Re = 10, Re = 50, and Re = 100. Navier–Stokes equations are discretized and numerically solved by a developed computer code in FORTRAN. Results are presented as the velocity, temperature, and Nusselt number profiles. Moreover, the effect of magnetic field on slip velocity and temperature jump is investigated for the first time in the present work. Larger Hartmann number, Reynolds number, and volume fraction correspond to more heat transfer rate; however, the effects of Ha and ϕ are more significant at higher Re.

show abstract

“…indicates the slip coefficient. By showing equation (17) in dimensionless form, hydrodynamic boundary condition along the walls is derived as…”

Section: Hydrodynamic Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Magnetic field effects on the slip velocity and temperature jump of nanofluid forced convection in a microchannel

Karimipour

Afrand

2015

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…This allows heating and cooling to be fulfilled more efficient while diminishing energy consumption (Ghasemi and Aminossadati, 2010; Aminossadati et al , 2012; Mansour et al , 2013). Pishkar and Ghasemi (2012) investigated mixed convection of nanofluids in a channel containing two fins. The impact of some factors including Reynolds and Richardson number, volume fraction of nanoparticle, distance between fins and thermal conductivity of its material on the thermal efficiency were studied.…”

Section: Introductionmentioning

confidence: 99%

MHD natural convection and entropy analysis of a nanofluid inside T-shaped baffled enclosure

Armaghani

Kasaeipoor

Izadi

et al. 2018

HFF

View full text Add to dashboard Cite

Purpose The purpose of this paper is to numerically study MHD natural convection and entropy generation of Al2O3-water alumina nanofluid inside of T-shaped baffled cavity which is subjected to a magnetic field. Design/methodology/approach Effect of various geometrical, fluid and flow factors such as aspect ratio of enclosure and baffle length, Rayleigh and Hartmann number of nanofluid have been considered in detail. The hydrodynamics and thermal indexes of nanofluid have been described using streamlines, isotherms and isentropic lines. Findings It is found that by enhancing Hartmann number, symmetrical streamlines gradually lose symmetry and their values decline. It is found that by enhancing Hartmann number, symmetrical streamlines gradually lose symmetry and their values decline. The interesting finding is an increase in the impact of Hartmann number on heat transfer indexes with augmenting Rayleigh number. However, with augmenting Rayleigh number and, thus, strengthening the buoyant forces, the efficacy of Hartmann number one, an index indicating the simultaneous impact of natural heat transfer to entropy generation increases. It is clearly seen that the efficacy of nanofluid on increased Nusselt number enhances with increasing aspect ratio of the enclosure. Based on the results, the Nusselt number generally enhances with the larger baffle length in the enclosure. Finally, with larger Hartmann number and lesser Nusselt one, entropy production is reduced. Originality/value The authors believe that all the results, both numerical and asymptotic, are original and have not been published elsewhere.

show abstract

“…Pishkar et al [9] studied mixed convection of nanofluid in a horizontal channel. They found that at low Richardson numbers the heat transfer is increased by enlarging the volume fraction of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Mixed Convection Heat Transfer of Nanofluid in a Lid Driven Square Cavity with Three Triangular Heating Blocks

Boulahia¹,

Wakif²,

Sehaqui³

2016

IJCA

View full text Add to dashboard Cite

The present investigation addressed mixed convection heat transfer of nanofluid in a lid driven square cavity with three triangular heating blocks. Finite volume discretization method with SIMPLE algorithm is employed for solving the twodimensional Navier-Stokes and energy balance equations. The method used is validated against previous works. Two cases were considered depending on the position of three triangular heating blocks. Effects of pertinent parameters such as; position of triangular heating blocks, the Richardson number (0.1 ≤ ܴ݅ ≤ 100), the Prandtl number of the pure water ‫ݎܲ(‬ = 6.2) and the volume fraction of nanoparticles (0 ≤ ߮ ≤ 0.05) on the flow and Nusselt number are investigated. The results of this study illustrate that, by reducing Richardson number and increasing the volume fraction of nanoparticles, the average Nusselt number increases. It is also found that there is an optimal position of triangular heating blocks where the heat transfer rate is maximized.

show abstract

Cooling enhancement of two fins in a horizontal channel by nanofluid mixed convection

Cited by 32 publications

References 40 publications

Magnetic field effects on the slip velocity and temperature jump of nanofluid forced convection in a microchannel

Magnetic field effects on the slip velocity and temperature jump of nanofluid forced convection in a microchannel

MHD natural convection and entropy analysis of a nanofluid inside T-shaped baffled enclosure

Numerical Investigation of Mixed Convection Heat Transfer of Nanofluid in a Lid Driven Square Cavity with Three Triangular Heating Blocks

Contact Info

Product

Resources

About