A new modeling method for complicated scenarios that can not be compartmentalized is proposed, and the results of the numerical experiment show that the method is feasible.

• 提出了一种针对不能合理划分单元的复杂火灾场景，在单元间采用等效开口面积体现烟气运动影响的新的建模方法；数值实验结果表明该方法是可行的。