Searched for: subject%3A%22porous%255C%2Bmedium%22
(1 - 5 of 5)
document
Nicasy, R. (author), Huinink, H.P. (author), Erich, S.J.F. (author), Adan, O.C.G. (author)
An improved High-Speed NMR profiling method is introduced that enables to measure capillary action in thin, non-transparent porous media. Liquid profiles can be measured as fast as 10 ms with a spatial resolution of 14.5 ┬Ám. Capillary absorption of microliter-sized droplets into non-transparent nylon-6,6 porous membranes was studied. In nylon-6...
article 2021
document
TNO Bouw en Ondergrond (author), Shamalta, M. (author), Breunese, A. (author), Peelen, W. (author), Fellinger, J. (author)
In this paper, the phenomenon of spalling of concrete in fire has been studied using a numerical model. Spalling is the violent or non-violent breaking off of layers or pieces of concrete when it is exposed to high temperatures as experienced in fires. The types and mechanisms of spalling have been explained. A numerical model has been developed...
article 2005
document
Zijl, W. (author), Nawalany, M. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)
We present a velocity-oriented discrete analog of the partial differential equations governing porous media flow: the edge-based face element method. Conventional finite element techniques calculate pressures in the nodes of the grid. However, such methods do not satisfy the requirement of flux continuity at the faces. In contrast, the edge...
article 2004
document
Zijl, W. (author), Nederlands Instituut voor Toegepaste Geowetenschappen TNO (author)
Inverse models to determine the permeability are generally based on existing forward models for the pressure. The permeabilities are adapted in such a way that the calculated pressures match the specified pressures in a number of points. To assimilate a priori knowledge about the flux, we introduce the 'flux assimilation method', which is based...
article 2004
document
Wipfler, E.L. (author), van Dijke, M.I.J. (author), van der Zee, S.E.A.T.M. (author)
We considered dense nonaqueous phase liquid (DNAPL) infiltration into a water-unsaturated porous medium that consists of two horizontal layers, of which the top layer has a lower intrinsic permeability than the bottom layer. DNAPL is the intermediate-wetting fluid with respect to the wetting water and the nonwetting air. The layer interface...
article 2004
Searched for: subject%3A%22porous%255C%2Bmedium%22
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