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Global instability of homogeneous flows in non-one-dimensional domains. (Russian, English) Zbl 1114.76324
Prikl. Mat. Mekh. 70, No. 2, 257-263 (2006); translation in J. Appl. Math. Mech. 70, No. 2, 229-234 (2006).
In the paper instability conditions for flows or states independent of time and coordinates in non-one-dimensional domains are considered in linear approximation. The notion of global instability introduced earlier for one-dimensional case is generalized. For weakly unstable flows a method is proposed allowing to establish conditions under which there exist unboundedly growing in time perturbations independent of specific boundary conditions (however, nondegenerated).

76E05 Parallel shear flows in hydrodynamic stability
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