... 非线性不不变性 nonlinear instability 数值粘性 numerical viscosity 年夜涡模拟 large eddy simulation ...
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In liquid and smoke simulation using Euler model, the common Semi-Lagrangian Method(SLM) has numerical viscosity due to excessive averaging steps, and the surface extracting method will further smear out details of water surface.
半拉格朗日方法在欧拉模型的液体与烟雾模拟中，因均值运算过多而存在数值粘性的问题，且表面提取算法会抹平液体表面的细节。
参考来源 - 稳定且维护细节的液体与烟雾模拟算法·2,447,543篇论文数据，部分数据来源于NoteExpress
文中应用负射流理论解释三维计算中较大的数值粘性带来的尾迹偏移现象。
The negative eject theory is employed to explain the phenomena that the wake over-turn is due to large numerical viscosity.
如果粘性高，它非常粘稠，这个数值，会变得很高。，C 1, will, be, very, high。，所以我们叫它粘性项，这个我们叫做压力项。
If you have a high viscosity, it's very sticky, then this number, C1 So this we call the viscous term, and this we call the pressure term.
但若采纳较高的过滤速度，或存在粘性或低孔率的尘埃层，应取稍高的数值。
However, the higher the filtration rate, or the presence of viscous or low porosity dust layer, should take a slightly higher value.
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