SIMULATION OF IMPURITY SPREAD IN THE WORKING ROOM WITH A COMPLEX VENTILATION SCHEME

Problem statement. The development and practical use of a numerical model for the analysis of the process of air pollution in the workplace during an emergency leak of a toxic substance is considered. The purpose of the article. Creation of numerical models of aerodynamics and mass transfer of the non-stationary process of the spread of a toxic substance in the workplace. Methodology. Modeling of the spread of a toxic substance during the operation of emergency ventilation is carried out on the basis of the Laplace equation for the velocity potential and the mass transfer equation, which takes into account the convective and diffusive transport of the toxic substance. Numerical integration of the modeling equations of the mechanics of a solid medium is carried out using finite-difference schemes using the labeling method. Scientific novelty. A numerical model was created for forecasting the level of air pollution in the working room due to the emission of toxic gas. The model is based on the numerical integration of the fundamental equations of solid medium mechanics. A feature of the numerical model is the consideration of the main physical factors that affect the spread of toxic gas in the room (the presence of equipment in the room, the position of the ventilation holes, the cities of emission of the toxic substance, etc.) and the speed of calculation. Practical significance. The developed numerical model can be used for the scientific substantiation of emergency ventilation parameters for workplaces where the emission of toxic substances is possible. Conclusions. A dynamic multifactorial numerical model was developed to analyze and forecast the process of chemical contamination of the workplace. A feature of the numerical model is the possibility to take into account the main physical factors affecting the formation of pollution areas in the workplace. The developed numerical model can be used for scientific substantiation of emergency ventilation parameters for rapid reduction of the concentration of toxic (or explosive) substance in the working room.