Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2015, Vol. 12, No. 2, pp. 127-139
Theoretical and experimental study of an effect of oil transfer behind booms
S.A. Ermakov
1,2 , I.A. Kapustin
1 , A.A. Molkov
1 , E.M. Sirotkin
2 , E.Yu. Cheban
2
1 Institute of Applied Physics RAS, Nizhny Novgorod, Russia
2 Volga State Academy of Water Transport, Nizhny Novgorod, Russia
According to airborne observations of ocean surface, attempts to contain and recover oil spills using booms may result in partial transmission of oil behind fencing. Results of theoretical and experimental studies of an effect of oil emulsion transfer behind booms are presented. Numerical simulation of the motion of particles of the emulsion in the flow field of near a barrier (booms) is performed. Laboratory and field experiments using special particles, simulating oil emulsion are carried out, and good agreement between numerical results and experiment is obtained. Different regimes of the dynamics of particles were observed, exactly: barrier particle retention at low speeds of the flow - with Froude numbers less than "critical"; the passage of particles at high speeds corresponding to the Froude number excess of the critical level. An important role of a natural (biogenic) film, accumulating in front of the barrier flowing around by a flow is demonstrated. It is shown that the film results in retention of the emulsion on the water surface and in reduction of the particle transfer behind the barrier. Enhancement of the particle transfer behind the barrier due to surface waves is revealed. Physical analysis of particle dynamics in the flow and conditions of emulsion transfer behind a barrier is given, and qualitative explanation of the results of numerical and physical experiments is presented.
Keywords: oil emulsion, booms, currents, surfactant films, surface waves
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