A5056762843- Groundwater flow and contamination studies
- Enhanced Oil Recovery Techniques
- Soil and Unsaturated Flow
- Hydrocarbon exploration and reservoir analysis
- Fecal contamination and water quality
- Hydraulic Fracturing and Reservoir Analysis
- Lattice Boltzmann Simulation Studies
- CO2 Sequestration and Geologic Interactions
- Advanced Mathematical Modeling in Engineering
- Surface Modification and Superhydrophobicity
- Bacteriophages and microbial interactions
- Heat and Mass Transfer in Porous Media
- Fuel Cells and Related Materials
- NMR spectroscopy and applications
- Landslides and related hazards
- Granular flow and fluidized beds
- Material Properties and Processing
- Electrostatics and Colloid Interactions
- Fluid Dynamics and Heat Transfer
- Atmospheric and Environmental Gas Dynamics
- Petroleum Processing and Analysis
- Geotechnical Engineering and Soil Mechanics
- Reservoir Engineering and Simulation Methods
- Toxic Organic Pollutants Impact
- Dam Engineering and Safety
Utrecht University
2015-2024
Stuttgart University of Applied Sciences
2021-2024
University of Stuttgart
2020-2024
Simulation Technologies (United States)
2022-2024
University of Cambridge
2023
Indian Institute of Technology Hyderabad
2022-2023
Deltares
2012-2019
Delft University of Technology
1996-2017
Procter & Gamble (Germany)
2017
Eindhoven University of Technology
2013
Important features of multiphase flow in porous media that distinguish it from single‐phase are the presence interfaces between fluid phases and common lines where three come contact. Despite this fact, mathematical descriptions these flows have been lacking rigor, consisting primarily heuristic extensions Darcy's law include a hysteretic relation capillary pressure saturation relative permeability coefficient. As result, standard concept appears to physically unrealistic properties. The...
In this article, the modeling of subsurface virus transport under saturated conditions and factors that affect adsorption inactivation are evaluated. Both equilibrium kinetic considered. Equilibrium is found to be little significance. Adsorption appears mainly kinetically limited. At pH 7 higher, generally unfavorable for attachment, but viruses may preferentially attach a minor surface fraction soil grains positively charged. The relation with charge their effects on sticking efficiencies...
In recent years, research activity on the recovery technique known as low salinity waterflooding has sharply increased. The main motivation for field application of is improvement oil by acceleration production (‘oil faster’) compared to conventional high brine injection. Up now, most focused core scale conducting coreflooding and spontaneous imbibition experiments. These tests serve proof that can lead additional recovery. Usually, it argued if flooding experiments show a positive shift in...
Current macroscopic theories of two-phase flow in porous media are based on the extended Darcy's law and an algebraic relationship between capillary pressure saturation. Both these equations have been challenged recent years, primarily theoretical works using a thermodynamic approach, which led to new governing for media. In equations, terms appear related fluid–fluid interfacial area non-equilibrium capillarity effects. Although there has growing number experimental aimed at investigating...
Capillary pressure plays a central role in the description of water flow unsaturated soils. While capillarity is ubiquitous analyses, theoretical basis and practical implications soils remain poorly understood. In most traditional treatments capillary pressure, it defined as difference between pressures phases, this case air water, assumed to be function saturation. Recent theories have indicated that should given more general thermodynamic definition, its functional dependence generalized...
To gain insight in relationships among capillary pressure, interfacial area, saturation, and relative permeability two-phase flow porous media, we have developed two types of pore-network models. The first one, called tube model, has only one element type, namely pore throats. second is a sphere-and-tube model with both bodies We shown that the models produce distinctly different curves for pressure permeability. In particular, find cannot reproduce hysteresis. investigated some basic issues...
The macroscopic porous medium equations for mass, momentum, and energy transport air, water, solid phases the interfaces between these are examined in light of second law thermodynamics. Attention is focused on momentum balance water phase. Appropriate forms obtained, general, slow flow situation case when phase completely wets solid. This last suggests that relative wettability air an important dependent thermodynamic variable which contributes to hysteretic nature capillary pressure versus...
In this study, we design a microfluidic chip, which represents the pore structure of naturally occurring oil-bearing reservoir rock. The pore-network has been etched in silicon substrate and bonded with glass covering layer to make complete is termed as 'Reservoir-on-a-chip' (ROC). Here report, for first time, ability perform traditional waterflooding experiments ROC. Oil kept resident phase ROC, performed displace oil from network. flow visualization provides specific information about...
In this study, we have developed a new method to generate multi-directional pore network for representing porous medium. The is based on regular cubic lattice network, which has two elements: bodies located at the points and throats connecting bodies. One of main features our that can be oriented in 13 different directions, allowing maximum coordination number 26 possible 3D space. ranges from 0 26, with pre-specified average value whole network. We applied reconstruct real sandstone...
We have developed a new approach for generating pore throat cross sections of various shapes based on distributions shape factors and radii inscribed circles. These are obtained from analysis grains packing. General formulas calculating geometrical properties entry capillary pressure given factor circle radius developed. relationships employed in network, which has number special features. In particular, it is highly flexible terms location bodies, variable coordination number, as well...
Abstract Darcy‐scale multiphase flow in geological formations is significantly influenced by the wettability of fluid‐solid system. So far it has not been understood how impacts pore‐scale regimes within rocks, which were most cases regarded as an alteration from base case strongly water‐wet conditions adjustment contact angles. In this study, we directly image regime a carbonate altered to mixed‐wet condition aging with crude oil represent natural configuration reservoir fast...
In currently applied theory of unsaturated flow, paradoxes exist concerning the equation state for water phase, idea a phase at negative absolute pressure, applicability hydrostatic pressure gradient equilibrium, and lack explicit inclusion interface effects in problem formulation. The flow presented here eliminates those indicates that hysteresis capillary relative permeability may be accounted by allowing these quantities to depend on interfacial area as well saturation. wettability...
A unifying approach for the derivation of watershed‐scale conservation equations governing hydrologic responses has recently been introduced. The is based on space‐time averaging corresponding point‐scale over an region called representative elementary watershed (REW). are supplemented by constitutive relationships needed closure various mass and momentum exchange terms. In this paper, we present a summary resulting somewhat simpler problem show how these can be employed to model long‐term...
The problem of concentrated brine transport arises in the study pollutants released from a repository rock salt formation. An important characteristic brine, as compared to other solutions normally encountered groundwater problems, is that it contains high concentration solutes. This factor requires special attention development mathematical models for problems. In this work we discuss certain physical and differences between low‐ high‐concentration situations. particular, consider three...
Development of pore network models based on detailed topological data the space is essential for predicting multiphase flow in porous media. In this work, an unstructured model has been developed to simulate a set drainage and imbibition laboratory experiments performed two‐dimensional micromodel. We used pixel‐based distance transform determine medial pixels void domain This process provides assembly with assigned local widths that simulates topology medium. Using model, capillary...