Heat transfer and entropy generation in fully-developed mixed convection nanofluid flow in vertical channel

Cha'o Kuang Chen, Bo Shiuan Chen, Chin-Chia Liu

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

A numerical investigation is performed into the heat transfer and entropy generation within a fully-developed mixed convection flow of Al2O3-water nanofluid in a vertical channel. The simulations focus specifically on the effects of the Brinkman number, mixed convection dimensionless parameter, and nanoparticle concentration on the velocity distribution, temperature distribution, Nusselt number and entropy generation within the channel. In performing the simulations, the velocity and temperature fields within the channel are computed using the differential transformation method (DTM) given the assumption of asymmetric heated walls. It is shown that the results obtained by the DTM method for the Nusselt numbers on the hot and cold walls, respectively, are in good agreement with the analytical results presented in the literature. In addition, it is shown that for a lower Brinkman number, the local Nusselt number of the nanofluid on the hot wall is greater than that of pure water and increases with an increasing nanoparticle concentration. However, given a higher value of the Brinkman number, the local Nusselt number of the nanofluid on the cold wall is less than that of pure water. Finally, it is shown that the average entropy generation number of the nanofluid is less than that of pure water. In general, the results presented in this study confirm the accuracy and feasibility of the DTM method in solving fluidic heat transfer problems and provide a useful insight into the effects of viscous dissipation on the entropy generation within vertical asymmetrically-heated channels containing mixed convection flow.

Original languageEnglish
Pages (from-to)750-758
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume79
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Mixed convection
Brinkman number
Nusselt number
convection
Entropy
heat transfer
entropy
Heat transfer
cold walls
water
Water
Temperature distribution
temperature distribution
velocity distribution
Nanoparticles
nanoparticles
Flow of water
fluidics
Fluidics
Velocity distribution

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

@article{a84f39d1ece34b3b80d86fc719a65263,
title = "Heat transfer and entropy generation in fully-developed mixed convection nanofluid flow in vertical channel",
abstract = "A numerical investigation is performed into the heat transfer and entropy generation within a fully-developed mixed convection flow of Al2O3-water nanofluid in a vertical channel. The simulations focus specifically on the effects of the Brinkman number, mixed convection dimensionless parameter, and nanoparticle concentration on the velocity distribution, temperature distribution, Nusselt number and entropy generation within the channel. In performing the simulations, the velocity and temperature fields within the channel are computed using the differential transformation method (DTM) given the assumption of asymmetric heated walls. It is shown that the results obtained by the DTM method for the Nusselt numbers on the hot and cold walls, respectively, are in good agreement with the analytical results presented in the literature. In addition, it is shown that for a lower Brinkman number, the local Nusselt number of the nanofluid on the hot wall is greater than that of pure water and increases with an increasing nanoparticle concentration. However, given a higher value of the Brinkman number, the local Nusselt number of the nanofluid on the cold wall is less than that of pure water. Finally, it is shown that the average entropy generation number of the nanofluid is less than that of pure water. In general, the results presented in this study confirm the accuracy and feasibility of the DTM method in solving fluidic heat transfer problems and provide a useful insight into the effects of viscous dissipation on the entropy generation within vertical asymmetrically-heated channels containing mixed convection flow.",
author = "Chen, {Cha'o Kuang} and Chen, {Bo Shiuan} and Chin-Chia Liu",
year = "2014",
month = "1",
day = "1",
doi = "10.1016/j.ijheatmasstransfer.2014.08.078",
language = "English",
volume = "79",
pages = "750--758",
journal = "International Journal of Heat and Mass Transfer",
issn = "0017-9310",
publisher = "Elsevier Limited",

}

Heat transfer and entropy generation in fully-developed mixed convection nanofluid flow in vertical channel. / Chen, Cha'o Kuang; Chen, Bo Shiuan; Liu, Chin-Chia.

In: International Journal of Heat and Mass Transfer, Vol. 79, 01.01.2014, p. 750-758.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Heat transfer and entropy generation in fully-developed mixed convection nanofluid flow in vertical channel

AU - Chen, Cha'o Kuang

AU - Chen, Bo Shiuan

AU - Liu, Chin-Chia

PY - 2014/1/1

Y1 - 2014/1/1

N2 - A numerical investigation is performed into the heat transfer and entropy generation within a fully-developed mixed convection flow of Al2O3-water nanofluid in a vertical channel. The simulations focus specifically on the effects of the Brinkman number, mixed convection dimensionless parameter, and nanoparticle concentration on the velocity distribution, temperature distribution, Nusselt number and entropy generation within the channel. In performing the simulations, the velocity and temperature fields within the channel are computed using the differential transformation method (DTM) given the assumption of asymmetric heated walls. It is shown that the results obtained by the DTM method for the Nusselt numbers on the hot and cold walls, respectively, are in good agreement with the analytical results presented in the literature. In addition, it is shown that for a lower Brinkman number, the local Nusselt number of the nanofluid on the hot wall is greater than that of pure water and increases with an increasing nanoparticle concentration. However, given a higher value of the Brinkman number, the local Nusselt number of the nanofluid on the cold wall is less than that of pure water. Finally, it is shown that the average entropy generation number of the nanofluid is less than that of pure water. In general, the results presented in this study confirm the accuracy and feasibility of the DTM method in solving fluidic heat transfer problems and provide a useful insight into the effects of viscous dissipation on the entropy generation within vertical asymmetrically-heated channels containing mixed convection flow.

AB - A numerical investigation is performed into the heat transfer and entropy generation within a fully-developed mixed convection flow of Al2O3-water nanofluid in a vertical channel. The simulations focus specifically on the effects of the Brinkman number, mixed convection dimensionless parameter, and nanoparticle concentration on the velocity distribution, temperature distribution, Nusselt number and entropy generation within the channel. In performing the simulations, the velocity and temperature fields within the channel are computed using the differential transformation method (DTM) given the assumption of asymmetric heated walls. It is shown that the results obtained by the DTM method for the Nusselt numbers on the hot and cold walls, respectively, are in good agreement with the analytical results presented in the literature. In addition, it is shown that for a lower Brinkman number, the local Nusselt number of the nanofluid on the hot wall is greater than that of pure water and increases with an increasing nanoparticle concentration. However, given a higher value of the Brinkman number, the local Nusselt number of the nanofluid on the cold wall is less than that of pure water. Finally, it is shown that the average entropy generation number of the nanofluid is less than that of pure water. In general, the results presented in this study confirm the accuracy and feasibility of the DTM method in solving fluidic heat transfer problems and provide a useful insight into the effects of viscous dissipation on the entropy generation within vertical asymmetrically-heated channels containing mixed convection flow.

UR - http://www.scopus.com/inward/record.url?scp=84908508973&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84908508973&partnerID=8YFLogxK

U2 - 10.1016/j.ijheatmasstransfer.2014.08.078

DO - 10.1016/j.ijheatmasstransfer.2014.08.078

M3 - Article

AN - SCOPUS:84908508973

VL - 79

SP - 750

EP - 758

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

SN - 0017-9310

ER -