同时该方法通过引入粒子数密度的概念和半隐式算法，有效地保持了流体的不可压缩性。

And at the same time introduce the concept of particle number density and the semi-implicit algorithm, effectively maintain the incompressible of the fluids.

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方程组采用SIMPLE(压力连接方程的半隐式)算法求解，求解结果较全面地反映了焊接气溶胶随时间、空间变化扩散的规律。

The equations were resolved by the SIMPLE algorithm. The results basically reflected the law of welding aerosol diffusion with the change of space and time.

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