Dynamics of Three-Dimensional Inclined Thermal
Publication: Journal of Hydraulic Engineering
Volume 121, Issue 8
Abstract
The flow dynamics of a three-dimensional thermal is investigated experimentally and theoretically. The lateral view and the plan view of the three-dimensional thermal are recorded by video camera. Variations of the maximum height, the maximum width, and the front speed of the thermal are obtained by the experiment. The front speed and the maximum height are nondimensionalized by the characteristic length and the characteristic time, which are determined by the initial conditions for the inclined thermal. It is shown that the nondimensional height and front speed are both dependent on the nondimensional time. The fundamental equations are developed for the three-dimensional inclined thermal consisting of the mass conservation equations of water and salinity, the momentum equation, and the equation of the thermal width. The numerical integration of the basic equations is shown to describe well the experimental results of the height and the speed of the inclined thermal.
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References
1.
Beghin, P., Hopfinger, E. J., and Britter, R. E.(1981). “Gravitational convection from instantaneous sources on inclined boundaries.”J. Fluid Mech., 107, 407–422.
2.
Beghin, P., and Olagne, X.(1991). “Experimental and theoretical study of the dynamics of powder snow avalanches.”Cold Regions Sci. and Technol., 19, 317–326.
3.
Britter, R. E., and Linden, P. F.(1980). “The motion of the front of a gravity current travelling down an inclined.”J. Fluid Mech., 99, 531–543.
4.
Escudier, M. P., and Maxworthy, T.(1973). “On the motion of turbulent thermal.”J. Fluid Mech., 61(3), 541–552.
5.
Fukushima, Y. (1986). “Analytical study of powder snow avalanches.”Seppyo (J. Japan Soc. of Snow and Ice), 48, 189–197 (in Japanese).
6.
Fukushima, Y. (1993). “Fluid dynamical simulation of pyroclastic flow and its application to Mt. Fugen, Unzen Volcano.”Proc. of IAHR XXV Cong., IAHR, 25(B-4), 133–140.
7.
Fukushima, Y., and Kagiyama, T. (1992). “Numerical simulation of pyroclastic flow at Mt. Fugen, Unzen Volcano based on the thermal theory.”Proc. Hydr. Engrg., JSCE, Tokyo, 36, 217–220 (in Japanese).
8.
Fukushima, Y., and Parker, G.(1990). “Numerical simulation of powder snow avalanches.”J. Glaciology, 36, 229–237.
9.
Hopfinger, E. J., and Beghin, P.(1980). “Buoyant clouds appreciable heavier than the ambient fluid on sloping boundaries.”Proc. 2nd Int. Symp. on Stratified Flows, Norway, 1, 495–506.
10.
Simpson, J. E.(1982). “Gravity current in the laboratory, atmosphere and ocean.”Ann. Rev. Fluid Mech., 14, 213–234.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 121 • Issue 8 • August 1995
Pages: 600 - 607
Copyright
Copyright © 1995 American Society of Civil Engineers.
History
Published online: Aug 1, 1995
Published in print: Aug 1995
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