Self-organized criticality and 1/f-noise at interacting nonequilibrium phase transitions

Oscillatory combustion regimes were experimentally investigated under the c onditions of ignitable liquid boiling-up before the reaction front. Fluctua tions with a power spectral density inversely proportional to frequency (1/ f-noise) were observed and the power-law character of distribution function s was found. The phenomena are connected with the intersection and interact ion of nonequilibrium phase transitions. A mathematical model describing th e initiation of 1/f fluctuations at the interaction of a subcritical phase transition and supercritical one in a space-distributed system was suggeste d. (C) 2001 Elsevier Science B.V. All rights reserved.