Porous aluminum oxide (PAO) is a nanostructured material used for various biotechnological applications, including the culturing microorganisms and other types of cells. The ability to chemically modify the PAO surface and tailor its surface properties is a promising way to expand and refine its applications. The immobilization of biomolecules on P...
Watergeven aan champignoncompost op het moment dat de vlucht uitgroeit, vertoont een verbetering van de opbrengst aan champignons. Dat is het resultaat van onderzoek dat door PRI Paddenstoelen is uitgevoerd
The major objective of this research is to gain a better understanding of the heterogeneous interactions between reactive solutes and the solid phase at the pore scale, to scale up to the core scale and compare with the results of experimental observations and analytical equations. In this research we develop a new technique for discretization of c...
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 forms a...
A new method is presented to construct a simple and general site bond correlated 3D HYdraulic POre Network model (HYPON) of hydraulic behavior of porous media for a wide range of permeability and porosity. Pore scale microstructure in this model is captured through simple power functions of Beti’s influence lines that fix both the location and the ...
This dissertation describes averaging of microscale flow equations to obtain a consistent description of liquid flow in unsaturated porous media on the macroscale. It introduces a new method of averaging the pressure term and a unit cell model capable of describing unsaturated flow. Starting from the description of liquid flow through individual po...
The structure and dynamics of water diffusion and -transport at a microscale in heterogeneous porous media have been investigated using various 1H NMR techniques. In particular in biological porous media the dynamics are usually very complex since it is intimately related to the microstructure (close environment). Fortunately, there is an almost en...
Considerable effort has been directed towards the application of percolation theory and fractal modeling to porous media. We combine these areas of research to investigate percolation in prefractal porous media. We estimated percolation thresholds in the pore space of homogeneous random 2-dimensional prefractals as a function of the fractal scale i...
Displacement imaging is a recent, powerful NMR method with which distributions of displacements can be acquired of e.g. fluids within a porous medium. Both motion parallel and perpendicular to the flow direction may be observed within a time window of a few milliseconds to several seconds. By combining displacement imaging with the line scan techni...
