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TECHNICAL PAPERS: Evaporation, Boiling, and Condensation

Experimental Study of Electrohydrodynamic Induction Pumping of a Dielectric Micro Liquid Film in External Horizontal Condensation Process

[+] Author and Article Information
K. Brand

Wieland-Werke AG, Heat Transfer Engineering Department, 89070 Ulm, Germany

J. Seyed-Yagoobi

Enhancement of Heat Transfer and Two Phase Flow Laboratory, Department of Mechanical, Materials, Aerospace Engineering, Illinois Institute of Technology, 10 West 32nd Street, E1, Chicago, IL 60616

J. Heat Transfer 125(6), 1096-1105 (Nov 19, 2003) (10 pages) doi:10.1115/1.1621890 History: Received May 17, 2002; Revised June 16, 2003; Online November 19, 2003
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References

Figures

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Schematic of the condensation apparatus
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Outside heat transfer coefficient as a function of heat flux for all voltages and all frequencies
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Outside heat transfer coefficient ratio as a function of frequency at q≈15 kW/m2
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Condensate volume rate ratio as a function of frequency at q≈15 kW/m2
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Outside heat transfer coefficient ratio as a function of frequency at q≈25 kW/m2
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Condensate volume rate ratio as a function of frequency at q≈25 kW/m2
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Outside heat transfer coefficient ratio as a function of frequency at q≈40 kW/m2
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Condensate volume rate ratio as a function of frequency at q≈40 kW/m2
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Flow visualization of condensation process with EHD induction pumping in attraction and repulsion modes: (a) q=25 kW/m2,φ⁁=2 kV,f=20 Hz (attraction mode); and (b) q≈25 kW/m2,φ⁁=2 kV,f=50 Hz (repulsion mode).
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Interfacial velocity as a function of frequency (φ=2 kV,hl=0.08 mm,hv=5 mm,λ=6 mm, R123 at Tref=25°C)

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