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The Effect of a Bubble in B nard Convection at Low Rayleigh Number
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 Title & Authors
The Effect of a Bubble in B nard Convection at Low Rayleigh Number
Eom, Yong-Gyun; Gwon, Gi-Han;
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 Abstract
n a enclosed square cavity occurred B nard convection, the flow phenomena in the surrounding of the bubble attached at the upper cooled solid wall were studied by using a thermo-sensitive liquid-crystal tracer and image processing techniques. This method offers the advantage of measuring the entire flow field in a selected plane within the fluid at a given instant of time in contrast to point by point method like T/C. Quantitative data of the temperature were obtained by applying a colour-image-processing to the visualized image. As the flowing in a bubble, In a bubble size appears the flow phenomena which the direction of flow is reversed in the entire temperature and flow field. The observed phenomena are described with regard to the thermocapillary convection.
 Keywords
Thermocapillary Flow;Therms-Sensitive Liquid-Crystal;Image Processing;
 Language
Korean
 Cited by
 References
1.
McGrew, J. L., Bamford, F. L. and Rehm, T. R., 1966, 'Marangoni Flow : An Additiona Mechanism in Boiling Heat Transfer,' Science, Vol. 153 , pp. 1106-1107 crossref(new window)

2.
Gaddis, E. S., 1968, 'The Thermal Equilibrium of a Vapour Bubble on a Heated Solid Surface,' Ph. D., Thesis Manchester University, UK

3.
Kao, Y.S. and Kenning, D. B. R., 1972, 'Thermocapillary Flow Near a Hemispherical Bubble on a Heated Wall,' J Fluid Mech, Vol. 53, pp. 715-735 crossref(new window)

4.
Huplik, V. and Raithby, G. D., 1972, 'Surface Tension Effects in Boiling from a Downward-Facing Surface,' J. Heat Transfer, Vol. 94, pp. 403 -409

5.
Chun, Ch-H. and Wuest, W., 1979, 'Experiments on the Transition from the Steady to the Oscillatory Marangoni Convection of a Floating Zone under Reduced Gravity Efect, Acta Astronautica, Vol. 6, pp. 1073 - 1082 crossref(new window)

6.
Raake, D., Siekmann, J. and Chun, Ch-H., 1989, 'Temperature and Velocity Fields due to Surface Tension Driven Flow,' Exp. Fluids, Vol. 7, pp. 164-172 crossref(new window)

7.
Wozniak, G., Wozniak, K. and Bergelt, H., 1996, 'On the Influence of Buoyancy on the Surface Tension Driven Flow Around a Bubble on a Heated Wall,' Experiments in Fluids, Vol. 21, pp. 181-186 crossref(new window)

8.
Kassemi, M. and Rashidnia, N., 1997, 'Steady and Oscillatory Flows Generated by a Bubble in I-G and Low-G Environment,' 35th Aerospace Sciences Meeting & Exhibit, 6-10 Reno. NV

9.
Ozawa, M., Muller, U., Kimura, I. and Takamori, T., 1992, 'Flow and Temperature Measurement of Natural Convection in a Hele-Shaw Cell Using a Thermo-Sensitive Liquid-Crystal Tracer,' Exp. in Fluids, Vol. 12, pp. 213-222 crossref(new window)

10.
Dabiri, D. and Gharib, M., 1996, ' The Effects of Forced Boundary Conditions on Flow Within a Cubic Cavity Using Digital Partical Image Thermometry and Velocimetry(DPITV),' Exp. Thermal and Fluid Science, Vol. 13, pp. 349-363 crossref(new window)

11.
Baughn, J.W., Anderson, M.R., Mayhew, J.E. and Wolf, J.D., 1999, 'Hysteresis of Thermochromic Liquid Crystal Temperature Measurement Based onHue,' J. Heat Transfer, Vol. 121, pp. 1067-1072

12.
Ozawa, M, Shinoki, M, Kimura, I. and Umekawa, H., 1997, 可視化 情報, Vol. 17, No. 64, pp. 41-45