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单词 Ficks law of diffusion
释义

Ficks law of diffusion

中文百科

菲克定律 Fick's laws of diffusion

（重定向自Ficks law of diffusion）
图为宏观及微观观点下的分子扩散。一开始时，屏障（紫色线）的左边有一些溶质分子，而右边则没有。屏障被移走后，溶质开始扩散并愈来愈均匀地布满整个容器。上：一粒子在随机运动。中：更多粒子在随机运动，这个时候更容易看到溶质的分布是愈来愈均匀。下：当有大量溶质粒子的时候，所有随机性都消失了：溶质看起来就像有系统地且顺畅地，从高浓度的区域流到低浓度的区域去。菲克定律所描述的就是这种顺畅的流动。

菲克定律描述扩散作用，可以使用这条定律来求得扩散系数，D。定律由阿道夫·菲克于1855年推导出来。

英语百科

Fick's laws of diffusion 菲克定律

（重定向自Ficks law of diffusion）
Molecular diffusion from a microscopic and macroscopic point of view. Initially, there are solute molecules on the left side of a barrier (purple line) and none on the right. The barrier is removed, and the solute diffuses to fill the whole container. Top: A single molecule moves around randomly. Middle: With more molecules, there is a clear trend where the solute fills the container more and more uniformly. Bottom: With an enormous number of solute molecules, randomness becomes undetectable: The solute appears to move smoothly and systematically from high-concentration areas to low-concentration areas. This smooth flow is described by Fick's laws.

Fick's laws of diffusion describe diffusion and were derived by Adolf Fick in 1855. They can be used to solve for the diffusion coefficient, D. Fick's first law can be used to derive his second law which in turn is identical to the diffusion equation.
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