Natural convection heat transfer from upward-Facing horizontal heated surface with heated cylindrical pipe (effects of flow characteristic around heated cylinder)

Rikio Shimoyama, Akihiko Horibe, Naoto Haruki, Yoshihiko Sano

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Natural convection heat transfer from upward-facing horizontal heated surface which a heated cylindrical pipe is placed above is estimated experimentally. The purpose of this study is to determine the relationships of the heat transfer from the horizontal heater to the flow characteristics around the heated cylinder. The parameters considered were the distance of between the heaters, the heat flux and the aspect ratio of the heated cylinder. The results showed that flow characteristics had three distinctive patterns: non flow reversal, flow reversal occurred only in the heated cylinder and reached the horizontal heater. The necessary conditions determined the flow field were discussed. Heat transfer from the horizontal heater was enhanced by placing the heated cylinder above. In the case of no flow reversal and flow reversal occurred in the heated cylinder, Nusselt number increased with increasing the modified Rayleigh number. On the other hand, in flow reversal to the horizontal heater, they decreased generally with increasing that.

Original languageEnglish
Pages (from-to)2289-2300
Number of pages12
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume79
Issue number806
DOIs
Publication statusPublished - 2013

Fingerprint

flow characteristics
Engine cylinders
Natural convection
heaters
free convection
heat transfer
Pipe
Heat transfer
Nusselt number
Heat flux
Aspect ratio
Flow fields
Rayleigh number
aspect ratio
heat flux
flow distribution

Keywords

  • Chimney Effect
  • Flow Reversal
  • Flow Visualization
  • Heat Transfer
  • Heat Transfer Enhancement
  • Heated Cylindrical Pipe
  • Horizontal Heated Surface
  • Natural Convection

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

@article{5c1a4e3f72924aea9a49428d38d1fa96,
title = "Natural convection heat transfer from upward-Facing horizontal heated surface with heated cylindrical pipe (effects of flow characteristic around heated cylinder)",
abstract = "Natural convection heat transfer from upward-facing horizontal heated surface which a heated cylindrical pipe is placed above is estimated experimentally. The purpose of this study is to determine the relationships of the heat transfer from the horizontal heater to the flow characteristics around the heated cylinder. The parameters considered were the distance of between the heaters, the heat flux and the aspect ratio of the heated cylinder. The results showed that flow characteristics had three distinctive patterns: non flow reversal, flow reversal occurred only in the heated cylinder and reached the horizontal heater. The necessary conditions determined the flow field were discussed. Heat transfer from the horizontal heater was enhanced by placing the heated cylinder above. In the case of no flow reversal and flow reversal occurred in the heated cylinder, Nusselt number increased with increasing the modified Rayleigh number. On the other hand, in flow reversal to the horizontal heater, they decreased generally with increasing that.",
keywords = "Chimney Effect, Flow Reversal, Flow Visualization, Heat Transfer, Heat Transfer Enhancement, Heated Cylindrical Pipe, Horizontal Heated Surface, Natural Convection",
author = "Rikio Shimoyama and Akihiko Horibe and Naoto Haruki and Yoshihiko Sano",
year = "2013",
doi = "10.1299/kikaib.79.2289",
language = "English",
volume = "79",
pages = "2289--2300",
journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",
issn = "0387-5016",
publisher = "Japan Society of Mechanical Engineers",
number = "806",

}

TY - JOUR

T1 - Natural convection heat transfer from upward-Facing horizontal heated surface with heated cylindrical pipe (effects of flow characteristic around heated cylinder)

AU - Shimoyama, Rikio

AU - Horibe, Akihiko

AU - Haruki, Naoto

AU - Sano, Yoshihiko

PY - 2013

Y1 - 2013

N2 - Natural convection heat transfer from upward-facing horizontal heated surface which a heated cylindrical pipe is placed above is estimated experimentally. The purpose of this study is to determine the relationships of the heat transfer from the horizontal heater to the flow characteristics around the heated cylinder. The parameters considered were the distance of between the heaters, the heat flux and the aspect ratio of the heated cylinder. The results showed that flow characteristics had three distinctive patterns: non flow reversal, flow reversal occurred only in the heated cylinder and reached the horizontal heater. The necessary conditions determined the flow field were discussed. Heat transfer from the horizontal heater was enhanced by placing the heated cylinder above. In the case of no flow reversal and flow reversal occurred in the heated cylinder, Nusselt number increased with increasing the modified Rayleigh number. On the other hand, in flow reversal to the horizontal heater, they decreased generally with increasing that.

AB - Natural convection heat transfer from upward-facing horizontal heated surface which a heated cylindrical pipe is placed above is estimated experimentally. The purpose of this study is to determine the relationships of the heat transfer from the horizontal heater to the flow characteristics around the heated cylinder. The parameters considered were the distance of between the heaters, the heat flux and the aspect ratio of the heated cylinder. The results showed that flow characteristics had three distinctive patterns: non flow reversal, flow reversal occurred only in the heated cylinder and reached the horizontal heater. The necessary conditions determined the flow field were discussed. Heat transfer from the horizontal heater was enhanced by placing the heated cylinder above. In the case of no flow reversal and flow reversal occurred in the heated cylinder, Nusselt number increased with increasing the modified Rayleigh number. On the other hand, in flow reversal to the horizontal heater, they decreased generally with increasing that.

KW - Chimney Effect

KW - Flow Reversal

KW - Flow Visualization

KW - Heat Transfer

KW - Heat Transfer Enhancement

KW - Heated Cylindrical Pipe

KW - Horizontal Heated Surface

KW - Natural Convection

UR - http://www.scopus.com/inward/record.url?scp=84887467935&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84887467935&partnerID=8YFLogxK

U2 - 10.1299/kikaib.79.2289

DO - 10.1299/kikaib.79.2289

M3 - Article

VL - 79

SP - 2289

EP - 2300

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 806

ER -