漏气轮胎中的克努森气体
Knudsen gas in flat tire
摘要:
我们考虑随机反射(根据朗伯分布)的光线在一个薄的可变宽度(但几乎圆形)管。当管的宽度变为零时,光线位置的适当重新缩放的角度分量在分布中收敛到扩散,扩散的参数(扩散率和漂移)在管宽度方面明确给出。
英文摘要:
We consider random reflections (according to the Lambertian distribution) of a light ray in a thin variable width (but almost circular) tube. As the width of the tube goes to zero, properly rescaled angular component of the light ray position converges in distribution to a diffusion whose parameters (diffusivity and drift) are given explicitly in terms of the tube width.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。