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The energy distribution resulting from an impact on a floating body. (English) Zbl 0983.76078

From the summary: We consider the initial stage of the water flow caused by an impact on a floating body. The vertical velocity of the body is prescribed and kept constant after a short acceleration stage. The study demonstrates that impact on a floating and non-flared body gives acoustic effects that are localized in time behind the front of compression wave generated at the moment of impact, and are of major significance for explaining the energy distribution throughout the water, but their contribution to the flow pattern near the body decays with time. We analyze the dependence on the body acceleration of both the water flow and the energy distribution – temporal and spatial. Calculations are performed for a half-submerged sphere within the framework of acoustic approximation. It is shown that the pressure impulse and total impulse of the flow are independent of the history of body motion, and can be found from pressure-impulse theory.

MSC:

76N99 Compressible fluids and gas dynamics
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