Detail publikace

Numerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs

Wang, W. Zhang, B. Cui, L.H. Zheng, H.W. Klemeš, J.J. Wang, J.

Anglický název

Numerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

en

Originální abstrakt

This study aims to investigate heat transfer and flow characteristics of ethylene glycol/water (EGW) and CuO-EGW nanofluids in circular tubes with and without trapezoid ribs. Nusselt number and friction factor in tubes with trapezoid ribs are analysed under a constant heat flux by changing rib bottom angles. This study compares the convective heat transfer coefficients of 6 vol.% CuO-EGW nanofluid and base fluid. It is found that under a constant Reynolds number, the Nusselt number and friction factor for CuO-EGW nanofluid and base fluid increase with an increase in the inclination angle. The Nusselt number for the CuO-EGW nanofluid in the tube with 75° rib bottom angle averagely increases by 135.8% compared to that in the smooth tube, and the performance evaluation criterion is 1.64. © 2021 Wei Wang et al., published by De Gruyter 2021.

Anglický abstrakt

This study aims to investigate heat transfer and flow characteristics of ethylene glycol/water (EGW) and CuO-EGW nanofluids in circular tubes with and without trapezoid ribs. Nusselt number and friction factor in tubes with trapezoid ribs are analysed under a constant heat flux by changing rib bottom angles. This study compares the convective heat transfer coefficients of 6 vol.% CuO-EGW nanofluid and base fluid. It is found that under a constant Reynolds number, the Nusselt number and friction factor for CuO-EGW nanofluid and base fluid increase with an increase in the inclination angle. The Nusselt number for the CuO-EGW nanofluid in the tube with 75° rib bottom angle averagely increases by 135.8% compared to that in the smooth tube, and the performance evaluation criterion is 1.64. © 2021 Wei Wang et al., published by De Gruyter 2021.

Klíčová slova anglicky

nanofluids; trapezoid rib; heat transfer enhancement; angle; friction factor

Vydáno

26.04.2021

Nakladatel

DE GRUYTER POLAND SP Z O OBOGUMILA ZUGA 32A STR, 01-811 WARSAW, MAZOVIA, POLAND

Místo

DE GRUYTER POLAND SP Z O OBOGUMILA ZUGA 32A STR, 01-811 WARSAW, MAZOVIA, POLAND

ISSN

2391-5471

Ročník

1

Číslo

19

Strany od–do

224–233

Počet stran

10

BIBTEX


@article{BUT172053,
  author="Jiří {Klemeš} and Jin {Wang},
  title="Numerical study on heat transfer and flow characteristics of nanofluids in a circular tube with trapezoid ribs",
  year="2021",
  volume="1",
  number="19",
  month="April",
  pages="224--233",
  publisher="DE GRUYTER POLAND SP Z O OBOGUMILA ZUGA 32A STR, 01-811 WARSAW, MAZOVIA, POLAND",
  address="DE GRUYTER POLAND SP Z O OBOGUMILA ZUGA 32A STR, 01-811 WARSAW, MAZOVIA, POLAND",
  issn="2391-5471"
}