by a factor of a few relative to that of Model 1. As a result, the gravitational energy released by the settling of the cloud, and dissipated into the background gas, is reduced by an order of magnitude relative to Model 1, as can be seen in Figure \[fig:mod4en\].

In the absence of trans/supersonic motion of the cloud through the background, shock dissipation cannot be a strong mechanism for the dissipation of energy due to motion of the cloud. The primary mechanism involves the wake of the cloud. In the simulations, the vortical motions behind the cloud dissipate energy on small scales, due to artificial and numerical viscosity. In three dimensions, the high Reynolds numbers would lead to the formation of turbulent wakes, which would lead to the dissipation of energy by viscous stress on sufficiently small length scales, leading to the same outcome as observed in Model 4. The observed outcome of the energy deposition is not, therefore, sensitive to the exact physical process responsible for it.

Summary and Discussion
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In this paper, we examine the interactions of a two-phase medium in a passive gravitational potential. This situation represents the physical environment that occurs naturally in the context 