National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Transport of Gaseous Mixtures in a Porous Membrane Support Modelled Using a Random Three-Dimensional Pore Network
Čapek, P. ; Veselý, M. ; Hejtmánek, Vladimír
In this paper, we developed a pore network model of multi-component mass transport in porous solids. Constitutive equations applied on the pore-scale level were based on the Maxwell-Stefan formulation. Fitting effective transport parameters like tortuosity was completely avoided. Essential information about pore sizes was extracted from the pore network model. It was shown that conditions for unusual phenomena, particularly up-hill flow, can be found quite often in practice. Pore network models also appear to be a very convenient tool for estimation of optimal conditions of diffusion experiments.
Fulltext: content.csg - Download fulltextPDF
Plný tet: SKMBT_C22014050212450 - Download fulltextPDF
Vícesložkový transport hmoty v nosiči membrán modelovaný pomocí náhodné třírozměrné sítě pórů
Čapek, P. ; Hejtmánek, Vladimír
The main objective of this work is to demonstrate unusual phenomena that attend transport of multicomponent mixtures of ideal gases in the porous membrane support represented by the pore network model. For this purpose, we simulated isobaric counter- current diffusion of binary and ternary mixtures. We also simulated viscous slip flow of multicomponent mixtures in order to show the significance of small pressure gradients on overall mass transport.

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