Drop Breakup and Liquid Jet Penetration

The dimensions and stabilization altitude are analyzed for the cloud produced by many near-surface nuclear bursts closely spaced and nearly simultaneous. Assumptions of the analysis include: the fluid is incompressible, except for small density variations in buoyancy terms; the entrainment rate of ambient air at the cloud boundary is proportional to the cloud mean vertical velocity; and the initial cloud has the form of a circular disk. Equations for conservation of mass, momentum and energy are written. Experimental determination of the entrainment parameter for the multiburst cloud is also discussed.