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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

Webb,  B. W., and Ma,  C.-F., 1995, “Single-Phase Liquid Jet Impingement Heat Transfer,” Adv. Heat Transfer, 26, pp. 105–217.
Watson,  E. J., 1964, “The Radial Spread of a Liquid Jet over a Horizontal Plane,” J. Fluid Mech., 20, pp. 481–499.
Chadhury,  Z. H., 1964, “Heat Transfer in a Radial Liquid Jet,” J. Fluid Mech., 20, pp. 501–511.
Wang,  X. S., Dagan,  Z., and Jiji,  L. M., 1989, “Heat Transfer Between a Circular Free Impinging Jet and a Solid Surface with Non-Uniform Wall Temperature of Wall Heat Flux: 1: Solution for the Stagnation Region,” Int. J. Heat Mass Transfer, 32, pp. 1351–1360.
Thomas,  S., Hankey,  W., and Faghri,  A., 1990, “One-Dimensional Analysis of the Hydrodynamic and Thermal Characteristics of Thin Film Flows Including the Hydraulic Jump Rotation,” ASME J. Heat Transfer, 112, pp. 728–736.
Rahman,  M. M., Faghri,  A., and Hankey,  W., 1991, “Computation of Turbulent Flow in a Thin Liquid Layer of Fluid Involving a Hydraulic Jump,” J. Fluids Eng., 113, pp. 411–418.
Rahman,  M. M., and Faghri,  A., 1992, “Analysis of Heating and Evaporation from a Liquid Film Adjacent to a Horizontal Rotating Disk,” Int. J. Heat Mass Transfer, 35, pp. 2655–2664.
Carper, H. J., and Defenbaugh, D. M., 1978, “Heat Transfer from a Rotating Disk with Liquid Jet Impingement,” Proceedings of 6th Int. Heat Transfer Conference in Toronto, pp. 113–118.
Carper,  H. J., Saavedra,  J. J., and Suwanprateep,  T., 1986, “Liquid Jet Impingement Cooling of a Rotating Disk,” ASME J. Heat Transfer, 108, pp. 540–546.
Vader,  D. T., Incropera,  F. P., and Viskanta,  R., 1991, “Local Convective Heat Transfer From a Heated Surface to an Impinging, Planar Jet of Water,” Int. J. Heat Mass Transfer, 34, pp. 611–623.
Stevens,  J., and Webb,  B. W., 1991, “Local Heat Transfer Coefficients Under and Axisymmetric, Single-Phase Liquid Jet,” ASME J. Heat Transfer, 113, pp. 71–78.
Mudawwar,  I. A., El-Masri,  M. A., Wu,  C. S., and Ausman-Mudawwar,  J. R., 1985, “Boiling Heat Transfer and Critical Heat Flux in High-Speed Rotating Liquid Films,” Int. J. Heat Mass Transfer, 28, pp. 795–806.
Faghri,  A., Thomas,  S., and Rahman,  M. M., 1993, “Conjugate Heat Transfer from a Heated Disk to a Thin Liquid Film Formed by a Controlled Impinging Jet,” ASME J. Heat Transfer, 115, pp. 116–123.
Aoune,  A., and Ramshaw,  C., 1999, “Process Intensification: Heat and Mass Tyransfer Characteristics of Liquid Films on Rotating Discs,” Int. J. Heat Mass Transfer, 42, pp. 2543–2556.
Metzger,  D. E., Bunker,  R. S., and Bosch,  G., 1991, “Transient Liquid Crystal Measurement of Local Heat Transfer on a Rotating Disk with Jet Impingement,” ASME J. Turbomach., 113, pp. 52–59.
Bizzak,  D. J., and Chyu,  M. K., 1995, “Use of a Laser—Induced Fluorescence Thermal Imaging System for Local Jet Impingement Heat Transfer Measurement,” Int. J. Heat Mass Transfer, 38, pp. 267–274.
Ozar,  B., Cetegen,  B. M., and Faghri,  A., 2003, “Experiments on the Flow of a Thin Liquid Film over a Horizontal Stationary and Rotating Disk Surface,” Exp. Fluids, 34, pp. 556–565.
Thomas,  S., Faghri,  A., and Hankey,  W., 1991, “Experimental Analysis and Flow Visualization of a Thin Liquid Film on a Stationary and Rotating Disk,” J. Fluid Mech., 113, pp. 73–80.

Figures

Grahic Jump Location
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.
Grahic Jump Location
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.
Grahic Jump Location
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.
Grahic Jump Location
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.
Grahic Jump Location
Film thickness distribution along the radial direction for a liquid film flowing on a rotating disk at Rei=1188
Grahic Jump Location
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
Grahic Jump Location
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
Grahic Jump Location
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
Grahic Jump Location
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
Grahic Jump Location
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
Grahic Jump Location
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
Grahic Jump Location
Experimental results versus correlation for the local Nusselt number for a liquid film flowing on a stationary/rotating disk
Grahic Jump Location
Experimental results versus correlation for average Nusselt number for a liquid film flowing on a stationary/rotating disk

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