Entropy generation due to natural convection cooling of a nanofluid

Shahi, Mina; Mahmoudi, Amir Houshang; Honarbakhsh-Raouf, A.

doi:10.1016/j.icheatmasstransfer.2011.04.008

Cited by 107 publications

(38 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mahian et al [34] conducted an investigation on the entropy generation due to nanofluids between two isoflux rotating cylinders and two types of nanofluids, Al 2 O 3 -EG and TiO 2 -water, were considered. Shahi et al [35] conducted a numerical investigation on the entropy generation of Cu-water nanofluids in a square cavity with four different designs, where a heat source was arranged. Mahmoudi et al [36] considered the entropy generation of Cu-water nanofluid natural convection in a cavity, in which three walls were set as adiabatic, and a constant temperature was employed on the right wall.…”

Section: Introductionmentioning

confidence: 99%

Entropy Generation and Heat Transfer Performances of Al2O3-Water Nanofluid Transitional Flow in Rectangular Channels with Dimples and Protrusions

Xie

Zheng

Zhang

et al. 2016

Entropy

View full text Add to dashboard Cite

Nanofluid has great potentials in heat transfer enhancement and entropy generation decrease as an effective cooling medium. Effects of Al 2 O 3 -water nanofluid flow on entropy generation and heat transfer performance in a rectangular conventional channel are numerically investigated in this study. Four different volume fractions are considered and the boundary condition with a constant heat flux is adopted. The flow Reynolds number covers laminar flow, transitional flow and turbulent flow. The influences of the flow regime and nanofluid volume fraction are examined. Furthermore, dimples and protrusions are employed, and the impacts on heat transfer characteristic and entropy generation are acquired. It is found that the average heat transfer entropy generation rate descends and the average friction entropy generation rate rises with an increasing nanofluid volume fraction. The effect of nanofluid on average heat transfer entropy generation rate declines when Reynolds number ascends, which is inverse for average friction entropy generation rate. The average wall temperature and temperature uniformity both drop accompanied with increasing pumping power with the growth in nanofluid volume fraction. The employment of dimples and protrusions significantly decreases the average entropy generation rate and improve the heat transfer performance. The effect of dimple-case shows great difference with that of protrusion-case.

show abstract

Section: Introductionmentioning

confidence: 99%

Entropy Generation and Heat Transfer Performances of Al2O3-Water Nanofluid Transitional Flow in Rectangular Channels with Dimples and Protrusions

Xie

Zheng

Zhang

et al. 2016

Entropy

View full text Add to dashboard Cite

show abstract

“…In designing practical systems, it is desirable to minimize the rate of entropy generation and to maximize the available energy Hooman et al (2008), Delavar, and Hedayatpour (2012). The entropy generation induced by natural convection heat transfer in a square cavity was studied by Shahi et al (2011) and found that the Nusselt number increased and the entropy generation reduced as the nanoparticle volume fraction was increased. Enhancement of collector thermal performance with different nanofluids was conducted Polvongsri andKiatsiriroat (2011), Natarajan andSathish (2009).…”

Section: Introductionmentioning

confidence: 99%

Assisted convective heat transfer and entropy generation in a solar collector filled with nanofluid

Nasrin

Алим²,

Hasanuzzzaman³

2016

J. nav. arch. mar. engg.

View full text Add to dashboard Cite

show abstract

“…Numerical study was performed to analyze entropy generation on natural convection flow of nanofluid in a square enclosure by Shahi et al (2011). All of the cavity walls were insulated except the cold bottom wall, there was an obstacle inside the enclosure with constant heat flux on its sides.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Mixed Convection Fluid Flow, Heat Transfer and Entropy Generation in Triangular Enclosure Filled with a Nanofluid

Aghaei

Sheikhzadeh

Ehteram

et al. 2016

JAFM

View full text Add to dashboard Cite

In this paper, mixed convection fluid flow, heat transfer and entropy generation inside a triangular enclosure filled with CuO-water nanofluid with variable properties are investigated numerically. The inclined walls of enclosure are maintained at a constant temperature T c . The moving bottom wall is kept at a constant temperature T h , which T h >T c .The numerical simulation of mixed convection is carried out using a computer program (FORTRAN language) based on finite volume method and SIMPLER algorithm. This study is performed over a range of nanoparticle volume fractions(0-0.02-0. ).In all investigated aspect ratios and Richardson numbers, average Nusselt number increased by enhancement of volume fraction till 0.02, but it is approximately constant by adding more nanoparticles till 0.04.It is also observed that in all aspect ratios and Richardson numbers, the variation of total entropy generation by enhancement of volume fraction is similar to Nusselt number.

show abstract

Entropy generation due to natural convection cooling of a nanofluid

Cited by 107 publications

References 28 publications

Entropy Generation and Heat Transfer Performances of Al2O3-Water Nanofluid Transitional Flow in Rectangular Channels with Dimples and Protrusions

Entropy Generation and Heat Transfer Performances of Al2O3-Water Nanofluid Transitional Flow in Rectangular Channels with Dimples and Protrusions

Assisted convective heat transfer and entropy generation in a solar collector filled with nanofluid

Numerical Investigation of Mixed Convection Fluid Flow, Heat Transfer and Entropy Generation in Triangular Enclosure Filled with a Nanofluid

Contact Info

Product

Resources

About