Knudsen diffusion

例句：

1. 1. The process of Knudsen diffusion is crucial for understanding the behavior of gases in nanoscale systems.
   努森扩散过程对于理解气体在纳米尺度系统中的行为至关重要。
2. 2. In the field of materials science, Knudsen diffusion has been widely used to study the transport properties ofsolids at very low temperatures.
   在材料科学领域，努森扩散被广泛用来研究固体在非常低温度下的传输特性。
3. 3. The Knudsen diffusion coefficient can be calculated using the formula: D = kT/(6πmD), where D is the diffusion coefficient, k is the Boltzmann constant, T is the temperature, mis the mass of the particle, and D is the diameter of the molecule or atom.
   可以通过公式 D = kT/(6πmD) 计算努森扩散系数，其中 D 是扩散系数，k 是玻尔兹曼常数，T 是温度，m 是粒子的质量，D 是分子或原子的直径。