Visualization method and device for gas leakage diffusion and nonvolatile storage medium

The invention discloses a gas leakage diffusion visualization method and device and a nonvolatile storage medium. The method comprises the following steps: determining the source intensity of leaked gas according to target data of a leakage opening of a container where the leaked gas is located; according to the relative molecular mass of the leaked gas and the source intensity of the leaked gas, the concentration of the leaked gas at any point in the target three-dimensional space coordinate system is determined, and the original point of the target three-dimensional space is the position of the leakage opening; in the target three-dimensional space coordinate system, a plurality of contour surfaces are determined, and the concentrations of the contour surfaces are the same; according to the contour surfaces, a three-dimensional simulation model is determined, and the diffusion condition of the leaked gas is visualized through the three-dimensional simulation model. The gas leakage diffusion visualization me