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Collective diffusionCollective diffusion is the diffusion of a large number of particles, most often within a solvent. Additional recommended knowledgeContrary to brownian motion, which is the diffusion of a single particle, interactions between particles may have to be considered, unless the particles form an ideal mix with their solvent (ideal mix conditions correspond to the case where the interactions between the solvent and particles are identical to the interactions between particles and the interactions between solvent molecules; in this case, the particles do not interact when inside the solvent). In case of an ideal mix, the particle diffusion equation holds true and the diffusion coefficient D the speed of diffusion in the particle diffusion equation is independent of particle concentration. In other cases, resulting interactions between particles within the solvent will amount for the following effects:
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Collective_diffusion". A list of authors is available in Wikipedia. |