INFLUENCE OF EFFECTS OF FLOW AROUND ON THE DYNAMICS OF NATURAL FIRE IN RELIEF IRREGULARITIES

Postnov A.D, Maslennikov D.A, Kataeva L.Y, Loshchilov S.A

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The paper discusses issues related to the influence of topography on the dynamics of wildfire due to the effects of flow.The basis of the calculations is a physical model of forest fires in the two-dimensional formulation that takes into account the laws of conservation of mass, momentum, energy, and chemical and physical processes. For the numerical solution of the problem, a method of Harlow used. This paper investigates the propagation of a fire in different configurations of relief: hill, plain and ravine. Isotherm and the velocity field for various time points shown. The influence of relief on the flow and consequently on the shape of the flame and the speed of fire propagation analyzed. Clearly demonstrated the dependence relief on the fire rate propagation is not confined to the function of the angle of inclination. Despite the fact that in some areas the rate of fire can vary significantly, the average speed of propagation approximately the same, which is associated with a low angle slopes of the hill and ravine (11 °).

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Постнов А.Д, Масленников Д.А, Катаева Л.Ю, Лощилов С.А ВЛИЯНИЕ ЭФФЕКТОВ ОБТЕКАНИЯ НА ДИНАМИКУ ПРИРОДНОГО ПОЖАРА В УСЛОВИЯХ НЕОДНОРОДНОСТИ РЕЛЬЕФА // Научное обозрение. Физико-математические науки . 2020. № 1. С. 49-49;
URL: https://physics-mathematics.ru/en/article/view?id=66 (дата обращения: 24.06.2026).