Developing turbulent heat transfer in a 360°bend of square cross section

Kun Ho Chun, Young Don Choi, Jong Keun Shin

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper reports the computational results on the developing turbulent heat transfer in a 360°bend of square cross section. The centrifugal force acting on the fluid in a bend flow induces strong cross-stream motion. It was found from the computations that the counterrotating vortex pair caused by the centrifugal force are broken into a multicell pattern after the θ = 90°station of the bend and the continuous arising and ceasing of the vortices directly affects the variation of heat transfer through the walls of the bend. Particular attention was paid to the developing process of the vortices because they exert the most significant effects on the convective heat transfer through the bend walls. A low Reynolds number second moment turbulence closure was employed to simulate the near wall turbulence behaviors of the bend.

Original languageEnglish
Pages (from-to)77-88
Number of pages12
JournalHeat Transfer - Asian Research
Volume28
Issue number2
Publication statusPublished - 1999 Jan 1

Fingerprint

turbulent heat transfer
Vortex flow
centrifugal force
vortices
Heat transfer
cross sections
Turbulence
turbulence
convective heat transfer
low Reynolds number
closures
Reynolds number
heat transfer
moments
Fluids
fluids

Keywords

  • Curved duct flow
  • Gortler vortices
  • Square duct

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

Developing turbulent heat transfer in a 360°bend of square cross section. / Chun, Kun Ho; Choi, Young Don; Shin, Jong Keun.

In: Heat Transfer - Asian Research, Vol. 28, No. 2, 01.01.1999, p. 77-88.

Research output: Contribution to journalArticle

@article{49da598dea3042a9b92d21ec20770493,
title = "Developing turbulent heat transfer in a 360°bend of square cross section",
abstract = "This paper reports the computational results on the developing turbulent heat transfer in a 360°bend of square cross section. The centrifugal force acting on the fluid in a bend flow induces strong cross-stream motion. It was found from the computations that the counterrotating vortex pair caused by the centrifugal force are broken into a multicell pattern after the θ = 90°station of the bend and the continuous arising and ceasing of the vortices directly affects the variation of heat transfer through the walls of the bend. Particular attention was paid to the developing process of the vortices because they exert the most significant effects on the convective heat transfer through the bend walls. A low Reynolds number second moment turbulence closure was employed to simulate the near wall turbulence behaviors of the bend.",
keywords = "Curved duct flow, Gortler vortices, Square duct",
author = "Chun, {Kun Ho} and Choi, {Young Don} and Shin, {Jong Keun}",
year = "1999",
month = "1",
day = "1",
language = "English",
volume = "28",
pages = "77--88",
journal = "Heat Transfer - Asian Research",
issn = "1099-2871",
publisher = "John Wiley and Sons Inc.",
number = "2",

}

TY - JOUR

T1 - Developing turbulent heat transfer in a 360°bend of square cross section

AU - Chun, Kun Ho

AU - Choi, Young Don

AU - Shin, Jong Keun

PY - 1999/1/1

Y1 - 1999/1/1

N2 - This paper reports the computational results on the developing turbulent heat transfer in a 360°bend of square cross section. The centrifugal force acting on the fluid in a bend flow induces strong cross-stream motion. It was found from the computations that the counterrotating vortex pair caused by the centrifugal force are broken into a multicell pattern after the θ = 90°station of the bend and the continuous arising and ceasing of the vortices directly affects the variation of heat transfer through the walls of the bend. Particular attention was paid to the developing process of the vortices because they exert the most significant effects on the convective heat transfer through the bend walls. A low Reynolds number second moment turbulence closure was employed to simulate the near wall turbulence behaviors of the bend.

AB - This paper reports the computational results on the developing turbulent heat transfer in a 360°bend of square cross section. The centrifugal force acting on the fluid in a bend flow induces strong cross-stream motion. It was found from the computations that the counterrotating vortex pair caused by the centrifugal force are broken into a multicell pattern after the θ = 90°station of the bend and the continuous arising and ceasing of the vortices directly affects the variation of heat transfer through the walls of the bend. Particular attention was paid to the developing process of the vortices because they exert the most significant effects on the convective heat transfer through the bend walls. A low Reynolds number second moment turbulence closure was employed to simulate the near wall turbulence behaviors of the bend.

KW - Curved duct flow

KW - Gortler vortices

KW - Square duct

UR - http://www.scopus.com/inward/record.url?scp=0032882265&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032882265&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0032882265

VL - 28

SP - 77

EP - 88

JO - Heat Transfer - Asian Research

JF - Heat Transfer - Asian Research

SN - 1099-2871

IS - 2

ER -