3D Numerical heat transfer and fluid flow analysis in plate-fin and tube heat exchangers with electrohydrodynamic enhancement

Chia Wen Lin, Jiin-Yuh Jang

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Three-dimensional laminar fluid flow and heat transfer over a four-row plate-fin and tube heat exchanger with electrohydrodynamic (EHD) wire electrodes are studied numerically. The effects of different electrode arrangements (square and diagonal), tube pitch arrangements (in-line and staggered) and applied voltage (V E=0-16 kV) are investigated in detail for the Reynolds number range (based on the fin spacing and frontal velocity) ranging from 100 to 1,000. It is found that the EHD enhancement is more effective for lower Re and higher applied voltage. The case of staggered tube pitch with square wire electrode arrangement gives the best heat transfer augmentation. For V E=16 kV and Re = 100, this study identifies a maximum improvement of 218% in the average Nusselt number and a reduction in fin area of 56% as compared that without EHD enhancement.

Original languageEnglish
Pages (from-to)583-593
Number of pages11
JournalHeat and Mass Transfer/Waerme- und Stoffuebertragung
Volume41
Issue number7
DOIs
Publication statusPublished - 2005 May 1

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tube heat exchangers
Electrohydrodynamics
electrohydrodynamics
Fins (heat exchange)
Tubes (components)
fins
fluid flow
Flow of fluids
heat transfer
Heat transfer
Electrodes
electrodes
augmentation
wire
Wire
tubes
Electric potential
Nusselt number
high voltages
Reynolds number

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

Cite this

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abstract = "Three-dimensional laminar fluid flow and heat transfer over a four-row plate-fin and tube heat exchanger with electrohydrodynamic (EHD) wire electrodes are studied numerically. The effects of different electrode arrangements (square and diagonal), tube pitch arrangements (in-line and staggered) and applied voltage (V E=0-16 kV) are investigated in detail for the Reynolds number range (based on the fin spacing and frontal velocity) ranging from 100 to 1,000. It is found that the EHD enhancement is more effective for lower Re and higher applied voltage. The case of staggered tube pitch with square wire electrode arrangement gives the best heat transfer augmentation. For V E=16 kV and Re = 100, this study identifies a maximum improvement of 218{\%} in the average Nusselt number and a reduction in fin area of 56{\%} as compared that without EHD enhancement.",
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