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TECHNICAL PAPERS: Forced Convection

Experiments on Heat Transfer in a Thin Liquid Film Flowing Over a Rotating Disk

[+] Author and Article Information
B. Ozar, B. M. Cetegen, A. Faghri

Department of Mechanical Engineering, University of Connecticut, Storrs, CT 06269-3139

J. Heat Transfer 126(2), 184-192 (May 04, 2004) (9 pages) doi:10.1115/1.1652044 History: Received January 24, 2003; Revised December 09, 2003; Online May 04, 2004
Copyright © 2004 by ASME
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References

Figures

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Experimental setup for heat transfer experiments for a liquid film flowing over a rotating disk. (1) Pulley assembly, (2) High precision spindle, (3) Flow collar, (4) Disk, (5) Etched foil heater, (6) Annular tank, (7) Thermocouples, (8) Motor, (9) Variable speed motor control, (10) 0-500V heater control, (11) Thermocouple transmitters, (12) Precision slip ring, (13) Cooling air, (14) Rotating coupling, (15) External process tank, (16) Heat exchanger, (17) Pump, (18) Bypass valve, (19) Large metering valve, (20) Small metering valve, and (21) Flow meter.
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Experimental setup for flow visualization experiments for a liquid film flowing over a rotating disk. (1) Pulley assembly, (2) High precision spindle, (3) Flow collar, (4) Disk, (5) Annular tank, (6) Motor, (7) Variable speed motor control, (8) Ar ion laser, (9) Mirrors, (10) Cylindrical lenses, (11) CCD Camera, (12) Precision linear slide, (13) Magnet, (14) Magnetic sensor, (15) Timing circuit, (16) Camera controller, and (17) Image acquisition/processing computer.
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Flow visualization of a liquid film flowing on a rotating/stationary disk for (a) Rei=238, 0 rpm; (b) Rei=555, 0 rpm; (c) Rei=555, 100 rpm; (d) Rei=555, 200 rpm; (e) Rei=555, 300 rpm; (f ) Rei=555, 500 rpm. Direction of disk rotation is indicated by the arrow.
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Film thickness distribution along the radial direction for a liquid film flowing on a stationary/rotating disk at (a) 0 rpm; (b) 100 rpm; and (c) 300 rpm.
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Film thickness distribution along the radial direction for a liquid film flowing on a rotating disk at Rei=1188
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Nusselt Number distributions along the radial direction for a thin liquid film flowing on a stationary and rotating disk for (a) Rei=238 (3.0 lpm), Q̇=3000 W, (b) Rei=555 (7.0 lpm), Q̇=3000 W, and (c) Rei=1188 (15.0 lpm), Q̇=4500 W
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Nusselt number distributions along the radial direction for a thin liquid film flowing on a stationary and rotating disk for (a) 0 rpm, (b) 100 rpm, and (c) 300 rpm
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Local Nusselt Number distribution for a thin liquid film flowing on a stationary and rotating disk as a function of Reynolds number for Pr=4.2 at (a) r/ri=1.4, (b) r/ri=2.1, and (c) r/ri=2.9
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Local Nusselt Number distribution for a thin liquid film flowing on a rotating disk as a function of rotational Reynolds number for Rei=555 at Q̇=3000 W
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Local Nusselt Number distribution for a thin liquid film over a rotating disk as a function of Rosby number for Rei=555 at Q̇=3000 W
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Comparison of Nusselt number distributions along the radial direction for a liquid film flowing over a stationary disk for Rei=555 at Q̇=3000 W for δi=0.254 mm, 0.381 mm and 0.508 mm
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Experimental results versus correlation for the local Nusselt number for a liquid film flowing on a stationary/rotating disk
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Experimental results versus correlation for average Nusselt number for a liquid film flowing on a stationary/rotating disk

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