MIGRATION OF THE GAS GLOBE FROM UNDERWATER EXPLOSIONS: THE EFFECTS OF DRAG AND RADIATIVE ENERGY LOSS

Authors
  1. Heaton, K.C.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
In the report, previous formulations of the problem of the motion of an underwater bubble are discussed. The ways in which the effects of drag as well as those of the energy radiated by a bubble during its motion can be incorporated into its equations of motion are discussed. A more rigorous derivation of the dissipation function for the bubble is presented. The equations of motion incorporating the effects of gravity and loss of energy by drag and the radiation of sound by the bubble are derived using a Lagrangian formalism. It was found that the generalized dissipative force is approximately proportional to the cube of the rate of change of the bubble radius with respect to time. The algorithm by which various forms of the equations of motion were solved is briefly discussed. Some computational results are presented and discussed, along with suggestions for the further extension of this work. TRUNCATED
Report Number
DREV-4373/86 —
Date of publication
15 Dec 1986
Number of Pages
47
DSTKIM No
87-00260
CANDIS No
49112
Format(s):
Hardcopy;Originator's fiche received by DSIS

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