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Theses

Imprégnation forcée de fluides dans des milieux poreux

Abstract : This thesis is about the ability of foam to extract a pollutant trapped in a fabric. We studied the forced impregnation of fluids into a single pore, in two particular cases : (i) when a liquid droplet impact vertically on the pore (this situation corresponds to the model of the impregnation of the pollutant into the fabric), and (ii) when a foam is sucked through a pore, which illustrate the competition between the suction on the foam and those of the porous media. For each case, the diameter of the pore is smaller than the diameter of droplet or bubble. At first, we studied the volume and how deep penetrates the liquid penetrates, for hydrophobic and hydrophilic surfaces. We established diagrams of impregnation as a function of the pore diameter and impact velocity, and a model determines the limits between the different areas of the diagram. For the second case, we showed that during the suction, the foam go into the pore only for one delimited area of the diagram liquid fraction, ration pore diameter / bubble diameter. Out of this area, suction force solely liquid or solely gas into the pore. Again, a model determines the limits between the different areas of the diagram. Finally an applied part of our work is about the ability of foam to extract a pollutant trapped in a fabric
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  • HAL Id : tel-00542832, version 2

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Aline Delbos. Imprégnation forcée de fluides dans des milieux poreux. Autre [cond-mat.other]. Université Paris-Est, 2010. Français. ⟨NNT : 2010PEST1056⟩. ⟨tel-00542832v2⟩

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