Mathematical Simulation of the Fall and Fragmentation of the Sikhote-Alin Bolide

Abstract

The problem of the hypersonic motion, destruction, and fragmentation of the Sikhote-Alin bolide in the atmosphere under the influence of power and thermal loads is studied numerically. Two mechanisms of heat transfer from the gas to the surface of the celestial body are taken into account: convective and radiative. The priority of each mechanism is studied on different parts of the trajectory of the fall. The process of the progressive fragmentation of the bolide is considered in the model of sequential fracturing. At the final stage of the fall, the process of small fragments breaking into dust due to temperature stresses is taken into account. It is noted that the results of the calculations reflect the actual process of fragmentation of the bolide qualitatively correctly.