Mostafa Mollaali

OpenGeoSys

Lars Bilke, Dmitri Naumov, Thomas Fischer, Jörg Buchwald et autres

Process' changes TH2M !5784 The unused process parameter reference_temperature was removed, see issue #3135. Component transport process / reactive transport process with coupling of Phreeqc !5591 OGS-PhreeqC reactive transport runs under OpenMP, MPI or both (hybrid parallelisation): ghost nodes are synchronised before …

de, co (code pays fourni par la source)

Numerical benchmarking of GREAT cell experiments: Poly-axial stress effects on fluid flow in fractured rock

Mostafa Mollaali, Wenqing Wang, Tao You, Thomas Nagel et autres

The present work deals with the fracture mechanics of crystalline rocks and in particular with the barrier integrity for the isolation of hazardous waste. The experimental data base is derived from the GREAT cell, a rock mechanics facility at the University of …

de, at, gb (code pays fourni par la source)

OpenGeoSys

Lars Bilke, Dmitri Naumov, Wenqing Wang, Thomas Fischer et autres

Process' changes Component transport process / reactive transport process with coupling of Phreeqc - [!5548](https://gitlab.opengeosys.org/ogs/ogs/-/merge_requests/5548) The data exchange between PhreeqC and OGS is now using string in the memory as the default option. It should accelerate the simulation for models with large …

de (code pays fourni par la source)

OpenGeoSys

Lars Bilke, Dmitri Naumov, Wenqing Wang, Christoph Lehmann et autres

Process' changes TH2M !5449 An H2M elastoplastic excavation benchmark. PhaseField !5451 Spectral decomposition for PhaseField. Component transport process / reactive transport process with coupling of Phreeqc !5472 When running HTC process with the presence of heat transport and one or more components, …

de, at, jp (code pays fourni par la source)

Numerical benchmarking of GREAT cell experiments: Poly-axial stress effects on fluid flow in fractured rock

Olaf Kolditz, Mostafa Mollaali, Wenqing Wang, Christopher Ian McDermott

The present work deals with the fracture mechanics of crystalline rocks and in particular with the barrier integrity for the isolation of hazardous waste. The experimental database is derived from the GREAT cell, a rock mechanics facility at the University of Edinburgh. …

de, gb (code pays fourni par la source)

Numerical Benchmarking of GREAT Cell Experiments: Poly-Axial Stress Effects on Fluid Flow in Fractured Rock Using Smeared and Discrete Methods

Mostafa Mollaali, Wenqing Wang, Tao You, Thomas Nagel et autres

The present work deals with the fracture mechanics of crystalline rocks and in particular with the barrier integrity for the isolation of hazardous waste. The experimental data base is derived from the GREAT cell, a rock mechanics facility at the University of …

SAFENET-2 – fracture evolution in crystalline rocks (from lab to in situ scale)

Olaf Kolditz, Christopher Ian McDermott, Jeoung Seok Yoon, Jörg Renner et autres

The DECOVALEX Task SAFENET is dedicated to advancing the understanding of fracture nucleation and evolution processes in crystalline rocks, with applications in nuclear waste management and geothermal reservoir engineering. Further improvements to fracture mechanics models are required in two distinct areas. Firstly, …

de, gb, cn (code pays fourni par la source)

Numerical benchmarking of GREAT cell experiments: insights into the impact of polyaxial stresses on fluid flow in fractured rock

Mostafa Mollaali, Wenqing Wang, Tao You, Keita Yoshioka et autres

A systematic benchmark suite is conducted to evaluate numerical methods in hydro-mechanical (HM) fracture mechanics. These benchmarks draw inspiration from experimental data collected using the GREAT cell at the University of Edinburgh—an advanced equipment designed to analyze fractured rocks under rotating stress …

de, at (code pays fourni par la source)

Integrating Finite Element Modeling and Machine Learning for Hydro-Mechanical Analysis of Swelling in Clay-Sulfate Rocks

Reza Taherdangkoo, Mostafa Mollaali, Matthias Ehrhardt, Thomas Nagel et autres

The swelling behavior of clay-sulfate rocks poses significant challenges in geotechnical engineering due to complex hydro-mechanical and chemical interactions. This study introduces a hybrid framework combining finite element modeling (FEM) with machine learning (ML) to efficiently analyze and predict the nonlinear behavior …

de (code pays fourni par la source)

A finite element-based machine learning model for hydro-mechanical analysis of swelling behavior in clay-sulfate rocks

Reza Taherdangkoo, Mostafa Mollaali, Matthias Ehrhardt, Thomas Nagel et autres

The hydro-mechanical behavior of clay-sulfate rocks, especially their swelling properties, poses significant challenges in geotechnical engineering. This study presents a hybrid constrained machine learning (ML) model developed using the categorical boosting algorithm (CatBoost) tuned with a Bayesian optimization algorithm to predict and …

Variational Phase‐Field Fracture Approach in Reactive Porous Media

Mostafa Mollaali, Keita Yoshioka, Renchao Lu, Vanessa Montoya et autres

ABSTRACT We present a comprehensive model to simulate fracture nucleation and propagation in porous media, incorporating chemical reactions. This model integrates three main processes: fluid flow in porous media, reactive transport, and the mechanical deformation of fractured porous media using a variational …

de, at, be, es (code pays fourni par la source)

A systematic model- and experimental approach to hydro-mechanical and thermo-mechanical fracture processes in crystalline rocks

Olaf Kolditz, Christopher J. McDermott, Jeoung Seok Yoon, Mostafa Mollaali et autres

The paper presents the key findings of Task G SAFENET of the DECOVALEX 2023 project “Safety Assessment of Fluid Flow, Shear, Thermal and Reaction Processes within Crystalline Rock Fracture NETworks”. It utilizes a systematic and experimental approach to numerically simulate mechanical (M), …

de, gb, us, kr, cn, ca (code pays fourni par la source)