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Image: DiffusionMicroMacro

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DiffusionMicroMacro.gif ‎(360 × 300 pixels, file size: 402 KB, MIME type: image/gif, looped, 60 frames, 6.5 s)

Description: 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 evenly. Bottom: With an enormous number of solute molecules, the randomness is gone: The solute appears to move smoothly and systematically from high-concentration areas to low-concentration areas, following Fick's laws. Image is made in Mathematica, source code below.
Title: DiffusionMicroMacro
Credit: Own work
Author: Sbyrnes321
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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