Enhancing convective heat transfer for laminar flow in a tube by inserting a concentric inner tube and controlling concurrent flows

a numerical assessment

Ching-Jenq Ho, Jung Yi Yen, Xiang Yun Kung, Tian-Shiang Yang, Alex Chang-Da Wen

Research output: Contribution to journalArticle

Abstract

The present study demonstrates, via a numerical simulation, the feasibility of achieving enhanced forced convection heat transfer of laminar water flow in an isoflux heated circular tube by inserting a concentric circular tube and controlling the concurrent flow distribution through the resulting concentric double-tube duct. Under identical operation conditions to those for the parent single-tube flow configuration, including the inlet fluid temperature, the total volumetric flow rate, the length of heated section, as well as the wall heat flux imposed, numerical simulations have been undertaken for the thermally developing convective heat transfer characteristics of water flow in the concentric double-tube duct featuring geometrically by three different relative radius ratio ro (= 1.2, 1.5, 1.8), compared with its parent single-tube duct of lh,ST = 0.1 at ReST = 100, 500, and 1000, respectively. In terms of the local and length-averaged heat transfer effectiveness gauged against that obtained for the parent single-tube duct, numerical results clearly demonstrate that the double-tube duct of smaller ro operating with relative larger flow rate than that in the inner tube can serve as highly effective heat transfer enhancement configuration.

Original languageEnglish
Pages (from-to)26-36
Number of pages11
JournalInternational Communications in Heat and Mass Transfer
Volume99
DOIs
Publication statusPublished - 2018 Dec 1

Fingerprint

convective heat transfer
laminar flow
Laminar flow
Ducts
ducts
tubes
Heat transfer
circular tubes
heat transfer
water flow
Flow rate
Flow of water
flow velocity
Forced convection
Computer simulation
Pipe flow
Heat flux
forced convection
configurations
heat flux

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Chemical Engineering(all)
  • Condensed Matter Physics

Cite this

@article{bf85d29ad77747838678b539a5b4e870,
title = "Enhancing convective heat transfer for laminar flow in a tube by inserting a concentric inner tube and controlling concurrent flows: a numerical assessment",
abstract = "The present study demonstrates, via a numerical simulation, the feasibility of achieving enhanced forced convection heat transfer of laminar water flow in an isoflux heated circular tube by inserting a concentric circular tube and controlling the concurrent flow distribution through the resulting concentric double-tube duct. Under identical operation conditions to those for the parent single-tube flow configuration, including the inlet fluid temperature, the total volumetric flow rate, the length of heated section, as well as the wall heat flux imposed, numerical simulations have been undertaken for the thermally developing convective heat transfer characteristics of water flow in the concentric double-tube duct featuring geometrically by three different relative radius ratio ro (= 1.2, 1.5, 1.8), compared with its parent single-tube duct of lh,ST = 0.1 at ReST = 100, 500, and 1000, respectively. In terms of the local and length-averaged heat transfer effectiveness gauged against that obtained for the parent single-tube duct, numerical results clearly demonstrate that the double-tube duct of smaller ro operating with relative larger flow rate than that in the inner tube can serve as highly effective heat transfer enhancement configuration.",
author = "Ching-Jenq Ho and Yen, {Jung Yi} and Kung, {Xiang Yun} and Tian-Shiang Yang and Wen, {Alex Chang-Da}",
year = "2018",
month = "12",
day = "1",
doi = "10.1016/j.icheatmasstransfer.2018.10.004",
language = "English",
volume = "99",
pages = "26--36",
journal = "International Communications in Heat and Mass Transfer",
issn = "0735-1933",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Enhancing convective heat transfer for laminar flow in a tube by inserting a concentric inner tube and controlling concurrent flows

T2 - a numerical assessment

AU - Ho, Ching-Jenq

AU - Yen, Jung Yi

AU - Kung, Xiang Yun

AU - Yang, Tian-Shiang

AU - Wen, Alex Chang-Da

PY - 2018/12/1

Y1 - 2018/12/1

N2 - The present study demonstrates, via a numerical simulation, the feasibility of achieving enhanced forced convection heat transfer of laminar water flow in an isoflux heated circular tube by inserting a concentric circular tube and controlling the concurrent flow distribution through the resulting concentric double-tube duct. Under identical operation conditions to those for the parent single-tube flow configuration, including the inlet fluid temperature, the total volumetric flow rate, the length of heated section, as well as the wall heat flux imposed, numerical simulations have been undertaken for the thermally developing convective heat transfer characteristics of water flow in the concentric double-tube duct featuring geometrically by three different relative radius ratio ro (= 1.2, 1.5, 1.8), compared with its parent single-tube duct of lh,ST = 0.1 at ReST = 100, 500, and 1000, respectively. In terms of the local and length-averaged heat transfer effectiveness gauged against that obtained for the parent single-tube duct, numerical results clearly demonstrate that the double-tube duct of smaller ro operating with relative larger flow rate than that in the inner tube can serve as highly effective heat transfer enhancement configuration.

AB - The present study demonstrates, via a numerical simulation, the feasibility of achieving enhanced forced convection heat transfer of laminar water flow in an isoflux heated circular tube by inserting a concentric circular tube and controlling the concurrent flow distribution through the resulting concentric double-tube duct. Under identical operation conditions to those for the parent single-tube flow configuration, including the inlet fluid temperature, the total volumetric flow rate, the length of heated section, as well as the wall heat flux imposed, numerical simulations have been undertaken for the thermally developing convective heat transfer characteristics of water flow in the concentric double-tube duct featuring geometrically by three different relative radius ratio ro (= 1.2, 1.5, 1.8), compared with its parent single-tube duct of lh,ST = 0.1 at ReST = 100, 500, and 1000, respectively. In terms of the local and length-averaged heat transfer effectiveness gauged against that obtained for the parent single-tube duct, numerical results clearly demonstrate that the double-tube duct of smaller ro operating with relative larger flow rate than that in the inner tube can serve as highly effective heat transfer enhancement configuration.

UR - http://www.scopus.com/inward/record.url?scp=85056160502&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85056160502&partnerID=8YFLogxK

U2 - 10.1016/j.icheatmasstransfer.2018.10.004

DO - 10.1016/j.icheatmasstransfer.2018.10.004

M3 - Article

VL - 99

SP - 26

EP - 36

JO - International Communications in Heat and Mass Transfer

JF - International Communications in Heat and Mass Transfer

SN - 0735-1933

ER -