Mathematical Simulation of Forest Fuel Element at the Crown Forest Fire Impact Taking Into Account Multiphase Reactive Media Mechanics Fundamentals; International Review of Mechanical Engineering (IREME); Vol. 14, № 8
| Parent link: | International Review of Mechanical Engineering (IREME) Vol. 14, № 8.— 2020.— [P. 504-515] |
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| Shrnutí: | Title screen In order to predict crown forest fires, it is necessary to study the behavior of various forest fuels in a high-temperature environment. In this work, the main regularities of pyrolysis in a foliage sample of angiosperms (birch) have been studied under conditions typical for the crown forest fire. Mathematically, the pyrolysis process in the forest fuel element is described by the system of non-stationary non-linear heat conduction equations with corresponding initial and boundary conditions. The problem is solved within the framework of the two-dimensional formulation by the finite difference method. The locally one-dimensional method has been used to solve two-dimensional equations of the heat conduction. In order to solve nonlinear effects caused by the pyrolysis of forest fuel material, the simple iteration method has been used. At the interface between the subareas, the boundary conditions of the fourth kind are used. The software implementation of the mathematical model is made in the high-level programming language Delphi in the RAD Studio software. The main regularities in changes of the temperature field and the phase composition of the sample under high-temperature exposure from the forest fire are presented. The induction period of the thermal decomposition of dry organic matter in the sample has been determined. Recommendations are made about the features of accounting for the pyrolysis process when predicting forest fire danger. The research results can be used in the development and the improvement of systems for predicting forest fire danger and environmental consequences of the forest fires. Режим доступа: по договору с организацией-держателем ресурса |
| Jazyk: | angličtina |
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2020
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| On-line přístup: | https://doi.org/10.15866/ireme.v14i8.19655 |
| Médium: | Elektronický zdroj Kapitola |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663412 |