| Abstract: | A model of eruption, which is a variant of that described in 4] and takes into account the disequilibrium of the pressure in the bubble and in the liquid in the absence of total solidification is proposed. The fragmentation zone is simulated by a disintegration wave with allowance for the velocity and temperature nonequilibrium of the particles of the gas suspension formed and its polydispersity. On the basis of the model constructed steady-state magma flow calculations are made for a given pressure difference and channel length. The results of the calculations show that taking pressure nonequilibrium into account leads to a qualitatively new dependence of the flow rate on the governing parameters and makes it possible to propose a catastrophic eruption intensification mechanism different from that proposed in 3].Translated from Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, No.2, pp. 49–60, March–April, 1993. |
