This paper simulates the buoyant flow changed with the parameters of fire and situation of surroundings atmosphere. We compute it with numerical method by using the FAC2 program.

• 本文应用FAC2程序,通过数值计算的方法,模拟了森林野外火区上的浮力流动随火区参数及环境气象因素的改变而变化的情况。