Workplace occupational exposure simulation analysis method based on computational fluid dynamics (CFD) technology

Abstract

The invention relates to a workplace occupational exposure simulation analysis method based on a computational fluid dynamics (CFD) technology. The method comprises the following steps of: determining a simulation scene through CFD three-dimensional modeling, and constructing a three-dimensional grid of the whole simulation region according to an arrangement region layout picture to be simulated; and constructing the grid of the whole simulation region by a bottom to top method in FLUENT preprocessing software GAMBIT. In the FLUENT, parameters are set according to a leakage scene to be simulated, namely a proper calculation model is selected according to a release state of toxic gas, the physical property of substances is defined, a boundary condition is set, and a flow field is initialized. A result is analyzed by utilizing a post-processing function and professional software such as Tecplot of the FLUENT, so that a gas diffusion path, a diffusion speed field, an atmosphere pressure field, concentration field distribution and the like of simulated toxic gas leakage are obtained; and therefore, toxic gas leakage and diffusion rule, exposure concentration and the like of a workplace are obtained through analysis.

Description

technical field [0001] The invention belongs to the field of preventive medicine occupational health and occupational disease control technology and occupational health risk management science and technology, and in particular proposes a simulation analysis technology for occupational exposure in the workplace based on CFD technology, which is mainly used in the occupational exposure assessment in the assessment of occupational disease hazards in construction projects , Quantitative analysis and practical application of hazardous substance exposure assessment. [0002] In this study, the CFD method was used to simulate occupational hazard exposure, and the three-dimensional computer simulation technology of FLUENT software was used to reveal the distribution law of the concentration field of toxic gases in the air of the crude oil refining operation site, and to achieve visualization. The FLUENT software based on the CFD method is used to realize the occupational exposure asse...

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Problems solved by technology

However, most of the poisonous gas leakage scenarios simulated by the current research are relatively simple, mainly focusing on the simulation of acute poison

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