24 Result(s)
within
Bernd Flemisch
Earth Sciences
English
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Article
A benchmark study on problems related to CO2 storage in geologic formations
This paper summarises the results of a benchmark study that compares a number of mathematical and numerical models applied to specific problems in the context of carbon dioxide (CO2) storage in geologic formation...
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Efficient multiphysics modelling with adaptive grid refinement using a MPFA method
A sequential solution procedure is used to simulate compositional two-phase flow in porous media. We employ a multiphysics concept that adapts the numerical complexity locally according to the underlying proce...
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Dimensionally reduced flow models in fractured porous media: crossings and boundaries
For the simulation of fractured porous media, a common approach is the use of co-dimension one models for the fracture description. In order to simulate correctly the behavior at fracture crossings, standard m...
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Editorial
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Development of Open-Source Porous Media Simulators: Principles and Experiences
By its very nature, research into multi-physical processes occurring in porous and fractured media requires a collaborative approach. An interdisciplinary approach has led to the adoption of collaborative soft...
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Chapter
Conclusions and Outlook
In this book, we have focused on the theory and practice of subsurface environmental modelling at the science-policy interface from an interdisciplinary perspective.
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Chapter
Introduction
Groundwater, resources, hidden secrets from the past... The subsurface contains all this and has consequently attracted the attention of engineers, geologists and many others. Groundwater has always served as ...
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Overview of Mathematical and Numerical Solution Methods
This chapter provides a brief overview of the mathematical and numerical methods which are employed for solving the systems of equations that arise from the kind of subsurface environmental problems discussed ...
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The Science-Policy Interface of Subsurface Environmental Modelling
Modelling activities in science are not limited to the scientific community itself, but relate to and impact other domains of society. With this chapter, we conceptually explore matters of modelling at the sci...
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Hydraulic Fracturing
Hydraulic fracturing—fracking, for short—refers to the stimulation of rock via the injection of fluids, typically water with additives, aiming at increasing the rock’s permeability. For hydrocarbon-bearing roc...
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Further Subsurface Environmental Modelling Cases
The scope of this book does not allow all related subsurface environmental engineering applications to be covered in as much detail as in the topics of the previous sections. Yet, many fields and problems rema...
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Conceptual Models for Environmental Engineering Related to Subsurface Flow and Transport
This chapter aims at providing an overview of research related to subsurface flow and transport modelling. We address the existing literature and discuss the role of modelling for engineering activities in the...
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Chapter
Software Concepts and Implementation
Coding a discretised mathematical model like the ones presented in Chaps. 2 and 3 yields a computational model in the form of software. Performing a numerical simulation corresponds to running a computational ...
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Geologic Carbon Sequestration
The energy transition has become a key political issue in many countries. The main emphasis of responses to climate change challenges is in transforming the energy system from high to low carbon energy supply ...
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Nuclear Energy and Waste Disposal
A field of subsurface environmental engineering which is likely to (re-)receive enormous societal attention is the fate of vast amounts of nuclear waste world-wide. One of the most likely options, given today’...
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Article
Open AccessSurrogate-based Bayesian comparison of computationally expensive models: application to microbially induced calcite precipitation
Geochemical processes in subsurface reservoirs affected by microbial activity change the material properties of porous media. This is a complex biogeochemical process in subsurface reservoirs that currently co...
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Open AccessComparison study of phase-field and level-set method for three-phase systems including two minerals
We investigate reactive flow and transport in evolving porous media. Solute species that are transported within the fluid phase are taking part in mineral precipitation and dissolution reactions for two compet...
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Open AccessCorrection to: Relating Darcy-Scale Chemical Reaction Order to Pore-Scale Spatial Heterogeneity
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Open AccessRelating Darcy-Scale Chemical Reaction Order to Pore-Scale Spatial Heterogeneity
Due to spatial scaling effects, there is a discrepancy in mineral dissolution rates measured at different spatial scales. Many reasons for this spatial scaling effect can be given. We investigate one such reas...
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Open AccessA surrogate-assisted uncertainty-aware Bayesian validation framework and its application to coupling free flow and porous-medium flow
Existing model validation studies in geoscience often disregard or partly account for uncertainties in observations, model choices, and input parameters. In this work, we develop a statistical framework that i...
