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A new model is presented which describes the evolution of the 2-D Rayleigh-Taylor instability by evaluating the rate of change of the vorticity generated at the unstable interface. For single mode perturbations, the known results for the linear growth rate and for the asymptotic bubble velocity are recovered. The stabilising effect of mass ablation is also proved. In the case of multimode perturbations, the model predicts growth of the highest rising bubbles in agreement with recent experiments and numerical simulations.

Additional information

Authors: WOUCHUK J G, ENEA, Centro Ricerche Energia Frascati, Roma (IT)
Bibliographic Reference: Report: RT/NUCL/92/36 EN (1993) 24 pp.
Availability: Available from Servizio Studi e Documentazione, ENEA, Centro Ricerche Energia Frascati, C.P. 65-00044 Frascati, Roma (IT)
Record Number: 199311247 / Last updated on: 1994-11-29
Original language: en
Available languages: en