Optimization of the wire electrode height and pitch for 3-D electrohydrodynamic enhanced water evaporation

Jin Sheng Leu, Jiin-Yuh Jang, Yi Hsuan Wu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this study, numerical and experimental analyses were carried out to study the electrohydrodynamic (EHD) effect on the evaporation rate of a channel forced convection flow. Three-dimensional steady turbulent flow equations combined with Maxwell equations were solved. The optimization of the electrode height (H) and longitudinal pitch (SL) was investigated numerically along with an optimal strategy (SCGM, simplified conjugate-gradient method). The mass transfer gain per power consumption was taken as the objective function to be maximized. The results showed that the EHD effect on the evaporating rate increased with increases in applied voltage and electrode pitch (SL) and decreases in electrode height (H). For example, as air flow inlet velocity uin = 1 m/s and applied voltage V0 = 15 kV, the mass transfer enhancement was doubled for SL = 40–100 mm at H = 20 mm, while the mass transfer enhancement was 3.5 times greater for H = 30–15 mm at SL = 100 mm. In addition, the optimization analysis indicated that the mass transfer gain enhanced per Watt power consumption by 316.9–179.7% when combined with the optimal (H, SL) design ranging from V0 = 13 to 17 kV and uin = 1.0 m/s. The comparisons of numerical results and experimental data obtained satisfactory consistency within a discrepancy of 19%.

Original languageEnglish
Pages (from-to)976-988
Number of pages13
JournalInternational Journal of Heat and Mass Transfer
Volume118
DOIs
Publication statusPublished - 2018 Mar 1

Fingerprint

Electrohydrodynamics
electrohydrodynamics
mass transfer
Evaporation
Mass transfer
evaporation
wire
Wire
Electrodes
optimization
electrodes
Water
water
Electric power utilization
conjugate gradient method
Inlet flow
Conjugate gradient method
evaporation rate
augmentation
flow equations

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

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title = "Optimization of the wire electrode height and pitch for 3-D electrohydrodynamic enhanced water evaporation",
abstract = "In this study, numerical and experimental analyses were carried out to study the electrohydrodynamic (EHD) effect on the evaporation rate of a channel forced convection flow. Three-dimensional steady turbulent flow equations combined with Maxwell equations were solved. The optimization of the electrode height (H) and longitudinal pitch (SL) was investigated numerically along with an optimal strategy (SCGM, simplified conjugate-gradient method). The mass transfer gain per power consumption was taken as the objective function to be maximized. The results showed that the EHD effect on the evaporating rate increased with increases in applied voltage and electrode pitch (SL) and decreases in electrode height (H). For example, as air flow inlet velocity uin = 1 m/s and applied voltage V0 = 15 kV, the mass transfer enhancement was doubled for SL = 40–100 mm at H = 20 mm, while the mass transfer enhancement was 3.5 times greater for H = 30–15 mm at SL = 100 mm. In addition, the optimization analysis indicated that the mass transfer gain enhanced per Watt power consumption by 316.9–179.7{\%} when combined with the optimal (H, SL) design ranging from V0 = 13 to 17 kV and uin = 1.0 m/s. The comparisons of numerical results and experimental data obtained satisfactory consistency within a discrepancy of 19{\%}.",
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Optimization of the wire electrode height and pitch for 3-D electrohydrodynamic enhanced water evaporation. / Leu, Jin Sheng; Jang, Jiin-Yuh; Wu, Yi Hsuan.

In: International Journal of Heat and Mass Transfer, Vol. 118, 01.03.2018, p. 976-988.

Research output: Contribution to journalArticle

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AB - In this study, numerical and experimental analyses were carried out to study the electrohydrodynamic (EHD) effect on the evaporation rate of a channel forced convection flow. Three-dimensional steady turbulent flow equations combined with Maxwell equations were solved. The optimization of the electrode height (H) and longitudinal pitch (SL) was investigated numerically along with an optimal strategy (SCGM, simplified conjugate-gradient method). The mass transfer gain per power consumption was taken as the objective function to be maximized. The results showed that the EHD effect on the evaporating rate increased with increases in applied voltage and electrode pitch (SL) and decreases in electrode height (H). For example, as air flow inlet velocity uin = 1 m/s and applied voltage V0 = 15 kV, the mass transfer enhancement was doubled for SL = 40–100 mm at H = 20 mm, while the mass transfer enhancement was 3.5 times greater for H = 30–15 mm at SL = 100 mm. In addition, the optimization analysis indicated that the mass transfer gain enhanced per Watt power consumption by 316.9–179.7% when combined with the optimal (H, SL) design ranging from V0 = 13 to 17 kV and uin = 1.0 m/s. The comparisons of numerical results and experimental data obtained satisfactory consistency within a discrepancy of 19%.

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