Talk:Diffusiophoresis and diffusioosmosis
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A fundamental question
editWhy to use the intricate "Diffusiphoresis" word in place of simply "Diffusion".
The page on Diffusiphoresis seems to simply describe the process of Molecular diffusion and uses strange terms poorly used in place of more common ones.
The "diffusion gradient" makes no sense and should be replaced by "concentration gradient".
This page should be critically reviewed and merged with that of Molecular diffusion, or simply deleted. Or do I miss a key point, and it describes another process than simple diffusion ? Shinkolobwe (talk) 22:34, 30 July 2009 (UTC)
Diffusiophoresis is not at all molecular diffusion. It is a process linked to the occurrence of diffusion and the development of a diffusion related flow flux in the course of it. — Preceding unsigned comment added by 192.67.218.50 (talk) 16:01, 24 October 2011 (UTC)
I also fail to understand how this is different than simple diffusion. It would really help distinguish this process if someone familiar with it could provide an equation not identical to Fick's laws for diffusion. The preceding comment claims they are distinct, but I believe the commentator was fundamentally confused. Belus 01:03, 19 November 2011 (UTC)
Was anyone able to access the references? I can't seem to find them anywhere. — Preceding unsigned comment added by 129.69.73.103 (talk) 10:03, 8 July 2014 (UTC)
I agree that "diffusion gradient" is confusing, so I have removed it. But diffusiophoresis is not the same as diffusion in the sense of Fick's law. Fick's law relates motion of species A due to a gradient in species A (ie in its own concentration) whereas diffusiophoresis is motion of species A in response to a gradient in species B. I will do a bit of work on the page to make this clearer. Rpsear (talk) 16:59, 24 December 2017 (UTC)
This is a nice article on an interesting topic. One little remark on the picture: the arrows probably indicate velocities. Yet there is an inconsistancy, if the particle moves to the right, the velocity of the nearby liquid is opposite, to the left. Indeed, the slip velocity ad midplane is larger than the particle velocity and of opposite sign. Also, the relation in the text between slip and particle velocities is not quite correct. — Preceding unsigned comment added by 147.210.24.135 (talk) 12:08, 23 April 2018 (UTC)