Istituto di Scienza e Tecnologie dell'Informazione     
Morandi Cecchi M. A numerical study of a non linear instability due to a three-dimensional disturbance in a plane parallel flow. In: International Conference on Computational Methods in Nonlinear Mechanics (Austin, Texas, 23-25 Sept 1974). Proceedings, pp. 281 - 288. 1974.
The solution of the diferential equation governing the evolution of localized point-centred three-dimensional disturbance in a plane parallel flow is presented here. A localized bust at a finite time can be produced for certain values of the coefficients which can be determineted analytically. The study was made numerically using an extension of the finite element method to parabolic operators in space-time. The solution are obtained into the complex field solving non linear systemsof equations using a functional interation method.

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