It imposes gradually changing of special particle size and diaphaneity in density field, achieves realistic effect of smog, reaches the intent of reducing particle number.
利用浓度场内空间粒子大小与透明度的逐渐变化，实现烟雾生成的逼真效果，达到降低粒子数量的目的。
And at the same time introduce the concept of particle number density and the semi-implicit algorithm, effectively maintain the incompressible of the fluids.
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。
This article makes an experimental study of gas-phase turbulence modulation by particles with different material density in small particle Reynolds number range.
在颗粒雷诺数较小范围内，针对不同密度材料颗粒对气相湍流的调制规律进行了实验研究。
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