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TECHNICAL PAPERS: Natural and Mixed Convection

Experimental Analysis of Thermal Instability in Natural Convection Between Horizontal Parallel Plates Uniformly Heated

[+] Author and Article Information
O. Manca, B. Morrone

Dipartimento di Ingegneria Aerospaziale, Seconda Università, degli studi di Napoli, Via Roma 29, 81031 Aversa CE, Italy

S. Nardini

Dipartimento di Energetica, DETEC Termofluidodinamica applicata e Condizionamenti ambientali, Università degli studi Federico II, Piazzale Tecchio, 80125 Napoli, Italy

J. Heat Transfer 122(1), 50-57 (Dec 10, 1999) (8 pages) doi:10.1115/1.521427 History: Received December 09, 1998; Revised December 10, 1999
Copyright © 2000 by ASME
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References

Goldstein,  R. J., and Volino,  R. J., 1995, “Onset and Development of Natural Convection Above a Suddenly Heated Horizontal Surface,” ASME J. Heat Transf., 117, pp. 808–821.
Mahajan,  R. L., 1996, “Transport Phenomena in Chemical Vapor Deposition Systems,” Adv. Heat Transfer, 28, pp. 339–425.
Sparrow,  E. M., and Carlson,  C. K., 1986, “Local and Average Natural Convection Nusselt Numbers for a Uniformily Heated, Shrouded or Unshrouded Horizontal Plate,” Int. J. Heat Mass Transf., 29, pp. 369–379.
Fukui,  K., Nakajima,  M., and Ueda,  H., 1983, “The Longitudinal Vortex Effects on the Transport Process in Combined Free and Forced Laminar Convection Between Horizontal and Inclined Parallel Plates,” Int. J. Heat Mass Transf., 26, pp. 109–119.
Maughan,  J. R., and Incropera,  F. P., 1987, “Experiments on Mixed Convection Heat Transfer for Airflow in a Horizontal and Inclined Channel,” Int. J. Heat Mass Transf., 30, pp. 1307–1318.
Maughan,  J. R., and Incropera,  F. P., 1990, “Regions of Heat Transfer Enhancement for Laminar Mixed Convection in a Parallel Plate Channel,” Int. J. Heat Mass Transf., 33, pp. 555–570.
Evans,  G., and Greif,  R., 1989, “A Study of Traveling Wave Instabilities in a Horizontal Channel Flow with Applications to Chemical Vapor Deposition,” Int. J. Heat Mass Transf., 32, pp. 895–911.
Evans,  G., and Greif,  R., 1993, “Thermally Unstable Convection With Applications to Chemical Vapor Deposition Channel Reactors,” Int. J. Heat Mass Transf., 36, pp. 2769–2781.
Cheng,  K. C., and Shi,  L., 1994, “Visualization of Convective Instability Phenomena in the Entrance Region of a Horizontal Rectangular Channel Heated From Below and/or Cooled From Above,” Exp. Heat Transfer, 7, pp. 235–248.
Lin,  W. L., and Lin,  T. F., 1996, “Experimental Study of Unstable Mixed Convection of Air in a Bottom Heated Horizontal Rectangular Duct,” Int. J. Heat Mass Transf., 39, pp. 1649–1663.
Lin,  W. L., and Lin,  T. F., 1996, “Unstable Aiding and Opposing Mixed Convection of Air in a Bottom-Heated Rectangular Duct Slightly Inclined from the Channel,” ASME J. Heat Transf., 118, pp. 47–55.
Chang,  M. Y., Yu,  C. H., and Lin,  T. F., 1997, “Changes of Longitudinal Vortex Roll Structure in a Mixed Convective Air Flow Through a Horizontal Plane Channel: An Experimental Study,” Int. J. Heat Mass Transf., 40, pp. 347–363.
Vafai,  K., and Ettefagh,  J., 1990, “Thermal and Fluid Flow Instabilities in Buoyancy-Driven Flows in Open-Ended Cavities,” Int. J. Heat Mass Transf., 33, pp. 2329–2344.
Vafai,  K., and Ettefagh,  J., 1990, “The Effects of Sharp Corners on Buoyancy-Driven Flows With Particular Emphasis on Outer Boundaries,” Int. J. Heat Mass Transf., 33, pp. 2311–2328.
Vafai,  K., Desai,  C. P., Iyer,  S. V., and Dyko,  M. P., 1997, “Buoyancy Induced Convection in a Narrow Open-Ended Annulus,” ASME J. Heat Transf., 119, pp. 483–494.
Hart,  J. E., 1971, “Transition of a Wavy Vortex Regime in Convective Flow Between Inclined Plates,” J. Fluid Mech., 48, Part 2, pp. 265–271.
Manca, O., Morrone, B., and Nardini, S., 1997 “Visualization of Natural Convection in Inclined Parallel Plates,” Thermal Managment of Electronic System, Vol. II, Kluwer Academic, Dordrecht, pp. 283–292.
Manca, O., Morrone, B., and Nardini, S., 1997, “Flow Visualization of Natural Convection between Horizontal Heated Parallel Plates,” Proceedings of the 4th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics, Brussels, 2–6 June, Vol. 4, pp. 2251–2258.
Chyu,  M. C., 1987, “On the Boundary Condition and Data Reduction of Heat Transfer Experiment,” Int. Commun. Heat Mass Transfer, 14, pp. 543–550.
Labview Reference Manual, 1993, National Instruments, Austin.
DANTEC, 1996, “Probes for Hot-Wire Anemometry,” Dantec Meas. Tech. Publ. No. 196-105-01.
Bruun, H. H., 1995, “Hot-Wire Anemometry: Principles and Signal Analysis,” Oxford University Press, New York.
Kline,  S. J., and McClintock,  F. A., 1953, “Describing Uncertainty in Single Sample Experiments,” Mech. Eng., 75, pp. 3–12.
Moffat,  R. J., 1988, “Describing the Uncertainties in Experimental Results,” Exp. Therm. Fluid Sci., 1, pp. 3–17.
Lavine,  A., 1993, “On the Linear Stability of Mixed and Free Convection Between Inclined Parallel Plates With Fixed Heat Flux Boundary Conditions,” Int. J. Heat Mass Transf., 36, pp. 1373–1387.

Figures

Grahic Jump Location
(a) View of the test section; (b) Sketch of heated sandwiched plate
Grahic Jump Location
Sketch of the visualization and anemometric arrangement
Grahic Jump Location
Relative heat fluxes distributions along the length of the plate: (——) convective and (−−−) conductive
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Subdivision of the main flow in the longitudinal section
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Longitudinal section at z=0.0 mm for b=32.2 mm,qΩ=60 W/m2; (a) Mode I (Gr=2.42×105); (b) Mode II (Gr=1.22×105); (c) Mode III (Gr=1.24×105)
Grahic Jump Location
Cross-stream sections for b=32.2 mm,qΩ=60 W/m2, and Gr=1.24×105, Mode III at (a) x=20 mm; (b) x=60 mm; (c) x=100 mm; (d) x=150 mm
Grahic Jump Location
b=32.2 mm,qΩ=120 W/m2, and Gr=2.35×105, Mode III: (a) longitudinal section z=0.0 mm; cross-stream section at (b) x=20 mm; (c) x=60 mm; (d) x=100 mm; (e) x=160 mm
Grahic Jump Location
Cross-stream section for b=32.2 mm,qΩ=240 W/m2, and Gr=4.65×105, Mode III: (a) x=20 mm; (b) x=60 mm; (c) x=100 mm
Grahic Jump Location
Time records of the air temperature at selected x-coordinate and y=8 mm for b=32.2 mm and (a) qΩ=60 W/m2(Gr=1.24×105); (b) qΩ=120 W/m2(Gr=2.35×105)
Grahic Jump Location
Time records of the air temperature at selected y-coordinate for b=32.2 mm and qΩ=120 W/m2(Gr=2.35×105) at (a) x=60 mm; (b) x=100 mm
Grahic Jump Location
Time records of the air temperature at selected y-coordinate for b=40.0 mm and qΩ=120 W/m2(Gr=5.56×105) at (a) x=50 mm; (b) x=100 mm
Grahic Jump Location
Time-average temperature along the y-direction at z=0.0 mm and several x-coordinates for Mode III: (a) b=32.2 mm and qΩ=60 W/m2(Gr=1.24×105); (b) b=32.2 mm and qΩ=120 W/m2(Gr=2.35×105); (c) b=40.0 mm and qΩ=120 W/m2(Gr=5.56×105); (d) b=40.0 mm,qΩ=240 W/m2(Gr=1.06×106)

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