Author:
Escudier M. P.,Maxworthy T.
Abstract
An analysis is presented of the motion of a turbulent thermal in an unstratified environment. Although based upon the entrainment hypothesis introduced by G. I. Taylor (see Morton, Taylor & Turner 1956), the analysis differs from previous work in that it is not limited to small density differences between the thermal and its surroundings. Also, the influence of the virtual mass of the unsteadily moving fluid, ignored by previous investigators, is included and shown to be of significance for any density difference.Calculations of the temporal variations of size, velocity and density are presented in non-dimensional form for thermals with initial density ratios covering the practically attainable range. It is shown a posteriori that losses of momentum and buoyancy to a wake are probably of negligible influence in any real case.
Publisher
Cambridge University Press (CUP)
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics
Reference15 articles.
1. Wang, C. P. 1971 Motion of an isolated buoyant thermal.Phys. Fluids,14,1643.
2. Turner, J. S. 1973 Buoyancy Effects in Fluids .Cambridge University Press.
3. Scorer, R. S. 1957 Experiments on convection of isolated masses of buoyant fluid.J. Fluid Mech. 2,583.
4. Morton, B. R. 1968 On Telford's model for clear air convection.J. Atmos. Sci. 25,135.
5. Milne-Thompson, L. M. 1967 Theoretical Hydrodynamics ,5th edn. Macmillan.
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