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A new predictive tool for saturated critical heat flux in micro/mini-channels: Effect of the heated length-to-diameter ratio

Wu, Zan LU and Li, Wei (2011) In International Journal of Heat and Mass Transfer 54(13). p.2880-2889
Abstract
This paper verified the macro-to-mini-scale criterion BoRe10.5=200 because data points where BoRe10.5≤200 and BoRe10.5>200 show very different trends for the entire database (1672 data points). Boiling number at critical heat flux (Blchf) decreases greatly with heated length-to-diameter ratio (Lh/dhe) when Lh/dhe is small while a relatively smooth trend occurs with large Lh/dhe values. The paper proposed a threshold value of Lh/dhe = 150, beyond which Lh/dhe presents negligible effect on saturated critical heat flux. The combined dimensionless number WemCa10.8 was introduced to analyze saturated critical heat flux, which represents the significance of inertia, surface tension, and viscous force, without considering gravitational force... (More)
This paper verified the macro-to-mini-scale criterion BoRe10.5=200 because data points where BoRe10.5≤200 and BoRe10.5>200 show very different trends for the entire database (1672 data points). Boiling number at critical heat flux (Blchf) decreases greatly with heated length-to-diameter ratio (Lh/dhe) when Lh/dhe is small while a relatively smooth trend occurs with large Lh/dhe values. The paper proposed a threshold value of Lh/dhe = 150, beyond which Lh/dhe presents negligible effect on saturated critical heat flux. The combined dimensionless number WemCa10.8 was introduced to analyze saturated critical heat flux, which represents the significance of inertia, surface tension, and viscous force, without considering gravitational force for the region where L h/dhe > 150 and BoRe10.5≤200. In addition, a new predictive tool for saturated critical heat flux in micro/mini-channels was obtained, predicting almost 95.5% of the non-aqueous data and 93.5% of the water data within a ±30% error band. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Boiling number, Capillary number, Heated length-to-diameter ratio, Micro/mini-channel, Saturated critical heat flux (CHF), Weber number
in
International Journal of Heat and Mass Transfer
volume
54
issue
13
pages
2880 - 2889
publisher
Pergamon
external identifiers
  • scopus:79955470163
ISSN
0017-9310
language
English
LU publication?
no
id
9fc54025-e267-4730-9e8d-0cfae61ca377 (old id 4285428)
date added to LUP
2014-02-06 15:27:17
date last changed
2017-11-19 03:07:46
@article{9fc54025-e267-4730-9e8d-0cfae61ca377,
  abstract     = {This paper verified the macro-to-mini-scale criterion BoRe10.5=200 because data points where BoRe10.5≤200 and BoRe10.5>200 show very different trends for the entire database (1672 data points). Boiling number at critical heat flux (Blchf) decreases greatly with heated length-to-diameter ratio (Lh/dhe) when Lh/dhe is small while a relatively smooth trend occurs with large Lh/dhe values. The paper proposed a threshold value of Lh/dhe = 150, beyond which Lh/dhe presents negligible effect on saturated critical heat flux. The combined dimensionless number WemCa10.8 was introduced to analyze saturated critical heat flux, which represents the significance of inertia, surface tension, and viscous force, without considering gravitational force for the region where L h/dhe > 150 and BoRe10.5≤200. In addition, a new predictive tool for saturated critical heat flux in micro/mini-channels was obtained, predicting almost 95.5% of the non-aqueous data and 93.5% of the water data within a ±30% error band.},
  author       = {Wu, Zan and Li, Wei},
  issn         = {0017-9310},
  keyword      = {Boiling number,Capillary number,Heated length-to-diameter ratio,Micro/mini-channel,Saturated critical heat flux (CHF),Weber number},
  language     = {eng},
  number       = {13},
  pages        = {2880--2889},
  publisher    = {Pergamon},
  series       = {International Journal of Heat and Mass Transfer},
  title        = {A new predictive tool for saturated critical heat flux in micro/mini-channels: Effect of the heated length-to-diameter ratio},
  volume       = {54},
  year         = {2011},
}