Formation and break-up of rigid agglomerates in turbulent channel and pipe flows

We have developed and applied an Eulerian–Lagrangian model for the transport, formation, break-up, deposition and re-entrainment of particle agglomerates. In this paper, we focus on agglomeration and break-up. Simulations were carried out to investigate what changes in the turbulent flow are inflicted by the presence of the agglomerates. Also,...

Design, operation and validation of a new fluid-sealed direct shear apparatus capable of monitoring fault-related fluid flow to large displacements

A new type of direct shear apparatus has been developed to allow for deformation of large and intact rock samples under fluid-sealed conditions. The sealed cell was specifically designed to monitor changes to fluid flow across the evolving rupture surface to large displacements (=120. mm), and effective stress conditions up to 36. MPa. To...

Pressure and fluid flow systems in the permian rotliegend in The Netherlands onshore and offshore

Hydrodynamics-based approaches were used to characterise and analyse the present-day pressure and fluid-flow conditions in the Permian Rotliegend reservoirs in the Netherlands. These approaches involve the use of multi-well pressure– depth plots, regional all fluid overpressure maps, salinity maps, and hydraulic-head maps. The maps and plots...

Development of a texture averaged Reynolds equation

The application of textured bearing surfaces results in a more complex lubricant flow pattern compared to smooth bearing surfaces. In order to capture the more complex flow pattern and possible inertia effects in the vicinity of the surface pockets, the NavierStokes equations should be used to model the flow between textured surfaces instead of...

Numerical modelling of the mechanical and fluid flow properties of fault zones - Implications for fault seal analysis

Existing fault seal algorithms are based on fault zone composition and fault slip (e.g., shale gouge ratio), or on fault orientations within the contemporary stress field (e.g., slip tendency). In this study, we aim to develop improved fault seal algorithms that account for differences in fault zone composition as well as deformation conditions...

The fluid flow consequences of CO2 migration from 1000 to 600 metres upon passing the critical conditions of CO2

The minimum injection depth for the storage of CO2 is normally set at 800 metres. At and beyond this depth in the subsurface conditions exist where CO2 is in a so-called critical state. The supercritical CO2 has a viscosity comparable to that of a normal gas and a liquid-like density, Due to the high density of the supercritical CO2, storing the...

An iterative ensemble Kalman filter for reservoir engineering applications

The study has been focused on examining the usage and the applicability of ensemble Kalman filtering techniques to the history matching procedures. The ensemble Kalman filter (EnKF) is often applied nowadays to solving such a problem. Meanwhile, traditional EnKF requires assumption of the distribution's normality. Besides, it is based on the...

Fluid-flow modeling of a relay node in an IEEE 802.11 wireless ad-hoc network

Wireless ad-hoc networks are based on shared medium technology where the nodes arrange access to the medium in a distributed way independent of their current traffic demand. This has the inherent drawback that a node that serves as a relay node for transmissions of multiple neighboring nodes is prone to become a performance "bottleneck". In the...

Coupled modelling of stress and fluid flow, with applications to gas extraction and disposal of energy residues

Coupled flow-stress numerical models have been increasingly used in geomechanical studies for a better understanding and more accurate prediction of subsurface behaviour due to the extraction of hydrocarbons and geological storage of energy residues. Two application studies are described demonstrating various ways of integration of the flow...

Geofluids in the Netherlands: Introduction

Traditionally, geologists focussed their research on the solid part of the subsurface. Increasingly geoscientists are aware of the role of fluids in the structural, sedimentological, mineral and (bio)geochemical evolution of the Earth’s crust. Geofluids research focusses on fluid-related processes on geological timescales. It includes a wide...

Fluid flow in the northern Broad Fourteens Basin during Late Cretaceous inversion

A basin-scale hydrogeological study of the inverted northern Broad Fourteens Basin, Netherlands offshore, has resulted in a reconstruction of geological evolution, an estimate of Late Cretaceous topography and model scenarios of syn-inversion meteoric water infiltration. This study was performed in the scope of a basin-scale analysis of the...

Application of fluid flow systems analysis to reconstruct the post-Carboniferous hydrogeohistory of the onshore and offshore Netherlands

The reconstruction of the post-Carboniferous hydrogeohistory of the onshore and offshore Netherlands is part of an ongoing TNO project on fluid flow systems analysis on geological timescales. The scope of the project is to assess the present-day hydrogeological and fluid flow conditions of the sedimentary basins in the onshore and offshore...

Flow pattern analysis for a well defined by point sinks

This paper deals with the analytical description of single-phase flow caused by abstraction wells and governed by Darcy's law. Since we are mainly interested in the velocity field upon which an analysis of transport phenomena can be based, we may assume that the flow is quasi steady. A well may be composed of a number of point sinks, therefore...