14 Result(s)
within
Bernd Flemisch
Geotechnical Engineering & Applied Earth Sciences
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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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Article
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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Article
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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Article
Editorial
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Article
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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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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Article
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...
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FluidFlower: A Meter-Scale Experimental Laboratory for Geological CO2 Storage
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Open AccessVisual Ensemble Analysis of Fluid Flow in Porous Media Across Simulation Codes and Experiment
We study the question of how visual analysis can support the comparison of spatio-temporal ensemble data of liquid and gas flow in porous media. To this end, we focus on a case study, in which nine different r...
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Article
Open AccessThe FluidFlower Validation Benchmark Study for the Storage of CO \(_2\)
Successful deployment of geological carbon storage (GCS) requires an extensive use of reservoir simulators for screening, ranking and optimization of storage sites. However, the time scales of GCS are such tha...
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Article
Open AccessUpscaling and Effective Behavior for Two-Phase Porous-Medium Flow Using a Diffuse Interface Model
We investigate two-phase flow in porous media and derive a two-scale model, which incorporates pore-scale phase distribution and surface tension into the effective behavior at the larger Darcy scale. The free-...
