File:Dispersion.gif
Dispersion.gif (580 × 440 pixels, file size: 1.87 MB, MIME type: image/gif, looped, 14 frames, 7.0 s)
Captions
Summary
editDescriptionDispersion.gif |
English: Yellow food coloring spreading in water. The glass on the left contains hot water, while the glass on the right contains cold water. The food coloring was added to the cold water slightly before the coloring was added to the hot water, yet after a few seconds it has spread more thoroughly in the hot water. The frames are roughly 1 second apart (so the animation is roughly 2x real-time). The dispersion is caused by convective mass flow due to concentration gradients, temperature gradients, bulk convective flow from localized density gradients. Currents and eddies are clearly visible. If the food coloring was to move throughout the container purely by diffussion, assuming a diffusion coeficient of 10^-12 m^2/s, it would take approximately 10^10 seconds for the dye to reach a 90% equilibrium. |
Date |
Unknown date Unknown date |
Source | Own work. It is/was also available (along with the source images) at http://ctho.ath.cx/pics/new/2006-09-24/ |
Author | CTho at English Wikipedia |
Permission (Reusing this file) |
File has been released into the public domain on en.wikipedia (original upload at en:Image:Diffusion.gif) |
Licensing
editThe copyright holder of this work allows anyone to use it for any purpose including unrestricted redistribution, commercial use, and modification.
Please check the source to verify that this is correct. In particular, note that publication on the Internet, like publication by any other means, does not in itself imply permission to redistribute. Files without valid permission should be tagged with {{subst:npd}}. Usage notes:
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 20:22, 7 May 2008 | 580 × 440 (1.87 MB) | Kenmayer (talk | contribs) | Yellow food coloring diffusing through water. The glass on the left contains hot water, while the glass on the right contains cold water. The food coloring was added to the cold water slightly before the coloring was added to the hot w | |
17:48, 9 November 2006 | 640 × 480 (1.64 MB) | Svdmolen (talk | contribs) | == Summary == Yellow food coloring diffusing through water. The glass on the left contains hot water, while the glass on the right contains cold water. The food coloring was added to the cold water slightly before the coloring was adde |
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File usage on Commons
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- User:Jacopo Werther/Favourites/Animated GIF
- File:Diffusion.gif (file redirect)
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