Engineering Physics Annotation << Back PHYSICAL AND MATHEMATICAL MODELING OF THE EXPLOSION, OR COMBUSTION OF THE PYROTECHNIC COMPOSITION W. MARK, A.T. KUZNETSOV In this work, the resulting model explosion, or combustion of a pyrotechnic composition based on the conservation laws of momentum and energy. The calculation formulas were tested on a specific example – pyroxylin and compared with data from reference literature and the Internet. Unfortunately, the parameters of the formulas and the necessary data were obtained from disparate sources, due to the fact that the topic has long been a closed topic in all countries. The analysis of the calculation formula for pyroxylin showed that the main contribution to the destruction of the selected objects in the explosion process is made by the energy of the shock wave, about 88 % and only 12 % is made by the kinetic energy of incandescent gases, but it must be taken into account when calculating the force of the explosion. This will help to avoid mistakes and accidents in the production of pyrotechnic compositions. The proposed physical and mathematical model of the explosion has a wave basis, with a carrier wavelength in the infrared range. The harmonics of this electromagnetic wave, formed by the radiation of polyatomic molecules, are in the range of wavelengths from the infrared to the visible region of electromagnetic radiation, this is due to the complexity of the structure of the molecules. In this connection, the physical and mathematical model well explains the presence or absence of bright flashes in the explosion of various explosives. Keywords: energy, momentum, quantum, explosion, pyrotechnic composition, pyroxylin. DOI: 10.25791/infizik.02.2020.1115 Pp. 03-11.