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Author:

Lu, Yuanwei (Lu, Yuanwei.) (Scholars:鹿院卫) | Yu, Qiang (Yu, Qiang.) | Du, Wenbin (Du, Wenbin.) | Wu, Yuting (Wu, Yuting.) (Scholars:吴玉庭)

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Scopus SCIE

Abstract:

The heat transfer from the vertical arrays of a set of equally spaced cylinders in molten salts is studied numerically to obtain the laminar natural convection heat transfer mechanism of molten salts around a vertically aligned horizontal cylinder set. Simulations are performed for arrays of 2-10 horizontal cylinders at a Rayleigh number based on a cylinder diameter between 2 x 10(3) and 5 x 10(5). Results show that the natural convective heat transfer of molten salts from the bottom cylinder of the array remains the same as that from a single cylinder. By contrast, the downstream cylinders may either be enhanced or reduced mainly depending on their location in the array and on the tube spacing. Heat transfer dimensionless correlating equations are proposed for any individual cylinder in the two vertically aligned horizontal cylinders. The heat transfer mechanism from the horizontal cylinders set in a vertical array is also simulated, and the results show that cylinder spacing can influence the average heat transfer rate around the whole tube array. Thus, in real applications, adjusting the cylinder spacing better enhances the average heat transfer from the whole tube array. (C) 2016 Elsevier Ltd. All rights reserved.

Keyword:

Natural convection Nusselt number Molten salts Pair of cylinders Simulation

Author Community:

  • [ 1 ] [Lu, Yuanwei]Beijing Univ Technol, Coll Environm & Energy Engn, Key Lab Enhanced Heat Transfer & Energy Conservat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 2 ] [Yu, Qiang]Beijing Univ Technol, Coll Environm & Energy Engn, Key Lab Enhanced Heat Transfer & Energy Conservat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 3 ] [Du, Wenbin]Beijing Univ Technol, Coll Environm & Energy Engn, Key Lab Enhanced Heat Transfer & Energy Conservat, Minist Educ China, Beijing 100124, Peoples R China
  • [ 4 ] [Wu, Yuting]Beijing Univ Technol, Coll Environm & Energy Engn, Key Lab Enhanced Heat Transfer & Energy Conservat, Minist Educ China, Beijing 100124, Peoples R China

Reprint Author's Address:

  • 鹿院卫

    [Lu, Yuanwei]Beijing Univ Technol, Coll Environm & Energy Engn, Key Lab Enhanced Heat Transfer & Energy Conservat, Minist Educ China, Beijing 100124, Peoples R China

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Source :

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER

ISSN: 0735-1933

Year: 2016

Volume: 76

Page: 147-155

7 . 0 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:166

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 22

SCOPUS Cited Count: 23

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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