Heat transfer enhancement from a vertical, isothermal channel generated by the chimney effect

A. G. Straatman; J. D. Tarasuk; J. M. Floryan

doi:10.1115/1.2910691

Heat transfer enhancement from a vertical, isothermal channel generated by the chimney effect

A. G. Straatman
, J. D. Tarasuk
, J. M. Floryan

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

70 Citations (Scopus)

Abstract

A numerical and experimental investigation of free convection from vertical, isothermal, parallel-walled channels has been undertaken to explore the heat transfer enhancement obtained by adding adiabatic extensions of various sizes and shapes. Investigations were carried out for air (Pr= 0.7) over a wide range of wall heating conditions. In all cases, the adiabatic extensions were able to increase heat transfer. The increase varied from 2.5 at low Ra* to 1.5 at high Ra*. The experimental and numerical results are in excellent agreement. A single correlation accounting for the channel aspect ratio L_h/b, expansion ratio, B/b, modified Rayleigh number, Ra* and heated length ratio, L_h/L is presented. © 1993 by ASME.

Original language	English
Pages (from-to)	395-402
Journal	Journal of Heat Transfer
Volume	115
Issue number	2
DOIs	https://doi.org/10.1115/1.2910691
Publication status	Published - May 1993
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

Augmentation and Enhancement
Natural Convection

Access Output

10.1115/1.2910691

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{afb93cde82e0401b94bb286aa9db0bac,

title = "Heat transfer enhancement from a vertical, isothermal channel generated by the chimney effect",

abstract = "A numerical and experimental investigation of free convection from vertical, isothermal, parallel-walled channels has been undertaken to explore the heat transfer enhancement obtained by adding adiabatic extensions of various sizes and shapes. Investigations were carried out for air (Pr= 0.7) over a wide range of wall heating conditions. In all cases, the adiabatic extensions were able to increase heat transfer. The increase varied from 2.5 at low Ra* to 1.5 at high Ra*. The experimental and numerical results are in excellent agreement. A single correlation accounting for the channel aspect ratio Lh/b, expansion ratio, B/b, modified Rayleigh number, Ra* and heated length ratio, Lh/L is presented. {\textcopyright} 1993 by ASME.",

keywords = "Augmentation and Enhancement, Natural Convection",

author = "Straatman, \{A. G.\} and Tarasuk, \{J. D.\} and Floryan, \{J. M.\}",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].",

year = "1993",

month = may,

doi = "10.1115/1.2910691",

language = "English",

volume = "115",

pages = "395--402",

journal = "Journal of Heat Transfer",

issn = "0022-1481",

publisher = "American Society of Mechanical Engineers",

number = "2",

}

TY - JOUR

T1 - Heat transfer enhancement from a vertical, isothermal channel generated by the chimney effect

AU - Straatman, A. G.

AU - Tarasuk, J. D.

AU - Floryan, J. M.

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 1993/5

Y1 - 1993/5

N2 - A numerical and experimental investigation of free convection from vertical, isothermal, parallel-walled channels has been undertaken to explore the heat transfer enhancement obtained by adding adiabatic extensions of various sizes and shapes. Investigations were carried out for air (Pr= 0.7) over a wide range of wall heating conditions. In all cases, the adiabatic extensions were able to increase heat transfer. The increase varied from 2.5 at low Ra* to 1.5 at high Ra*. The experimental and numerical results are in excellent agreement. A single correlation accounting for the channel aspect ratio Lh/b, expansion ratio, B/b, modified Rayleigh number, Ra* and heated length ratio, Lh/L is presented. © 1993 by ASME.

AB - A numerical and experimental investigation of free convection from vertical, isothermal, parallel-walled channels has been undertaken to explore the heat transfer enhancement obtained by adding adiabatic extensions of various sizes and shapes. Investigations were carried out for air (Pr= 0.7) over a wide range of wall heating conditions. In all cases, the adiabatic extensions were able to increase heat transfer. The increase varied from 2.5 at low Ra* to 1.5 at high Ra*. The experimental and numerical results are in excellent agreement. A single correlation accounting for the channel aspect ratio Lh/b, expansion ratio, B/b, modified Rayleigh number, Ra* and heated length ratio, Lh/L is presented. © 1993 by ASME.

KW - Augmentation and Enhancement

KW - Natural Convection

UR - https://www.scopus.com/pages/publications/0027591093

UR - https://www.scopus.com/pages/publications/0027591093#tab=impact

U2 - 10.1115/1.2910691

DO - 10.1115/1.2910691

M3 - RGC 21 - Publication in refereed journal

SN - 0022-1481

VL - 115

SP - 395

EP - 402

JO - Journal of Heat Transfer

JF - Journal of Heat Transfer

IS - 2

ER -

Heat transfer enhancement from a vertical, isothermal channel generated by the chimney effect

Abstract

Bibliographical note

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this