Fire simulation method and device based on two-dimensional estimation and multi-scale grid

The invention relates to the technical field of disaster prevention and reduction of civil engineering, in particular to a fire simulation method and device based on two-dimensional estimation and multi-scale grids, and the method comprises the steps: importing building group data, and obtaining a building group two-dimensional model according to the building group data; performing three-dimensional modeling according to the two-dimensional model of the building group to obtain a three-dimensional model of the building group; based on the two-dimensional model of the building group, estimating a two-dimensional fire spreading range according to a fire spreading mechanism and historical fire statistical data; obtaining a target building group three-dimensional model based on the building group three-dimensional model according to the two-dimensional fire spreading range; based on the target building group three-dimensional model, building group efficient three-dimensional fire simulation is carried out. Accord