Abstract
Since the seminal results of Batchelor, Morton and Turner who laid the foundations of classical convective plume theory, it has been recognized that convective thermals exhibit remarkable scaling properties. In this paper, the authors identify dynamics of strong thermals which can be drastically different from weak Boussinesq-type thermals. In general, the evolution of thermals is affected by the interplay of two processes: entrainment flux caused by thermal expansion and solid-body acceleration of the thermal centroid. As a result, depending on the density contrast between the thermal and the ambient environment, scaling laws are modified with different power-law exponents.
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