Helmholtz Institute Freiberg for Resource Technology
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1328 research outputs found
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Data publication: Uranium (VI) reduction by an iron-reducing Desulfitobacterium species as single cells and in artificial multispecies bio-aggregates
No full textThe stored data sets represent both the raw data and the evaluated data that were used for the publication about speciation-dependent uranium(VI) reduction by an iron-reducing bacteria in both pure culture and artificial multispecies bio-aggregates
Data publication: Diaphragm performance of high-temperature Na-Zn cells evaluated by Neutron Imaging
No full textData and source code accompanying the publication Nash et al. (2024) Neutron imaging of high-temperature Na-Zn Cells: implications for cell design and fabrication. For the purposes of reproducing volume integration and self-discharge current calculations
Data publication: MineNetCD: A Benchmark for Global Mining Change Detection on Remote Sensing Imagery
No full textThis is the full version of the MineNetCD dataset. The paper has been published in IEEE TGRS 2024 (https://ieeexplore.ieee.org/document/10744421). The dataset contains 100 sites, and the metadata can also be found in the zip archive.
The cropped version can also be found in Huggingface Hub (https://huggingface.co/datasets/HZDR-FWGEL/MineNetCD256)
Data Publication: Boron isotopic and mineral chemical composition in greisen-related Li-Fe micas at the Sadisdorf Li-Sn-(W-Cu) prospect, Erzgebirge, Germany: Pathways and mechanisms for hydrothermal lithium enrichment
No full textData set composed of sample descriptions, major and trace element compositions of micas, in-situ B isotopic analyses of micas and whole-rock B isotopic compositions of major lithologies at the Sadisdorf prospect.This project is funded as part of the DFG (Project no. 441189074) priority program Dynamics of Ore Enrichment (DOME; SPP 2238). FIERCE is financially supported by the Wilhelm and Else Heraeus Foundation and by the DFG
Multiphase Python Repository by HZDR
No full textThe python package provides several routines and scripts required to operate the code and cases repositories containing additional code and set-ups for the open-source software released by the OpenFOAM Foundation. This includes among others utilities for pre- and post-processing of simulation cases, utilities to launch virtual environments containing the source code, and utilities to operate the continuous integration and continuous development environment in a self-hosted Gitlab instance
Data publication: Simulation results for standard statistics of Poisson and Crofton cells
No full textThis dataset contains extensive simulation results on standard statistics of Poisson and Crofton cells, random convex polytopes arising from random tessellations of the plane or space by straight lines or planes.
The statistics recorded are (in this order) the area, boundary length and number of sides (2D) and the volume, surface area, mean width and number of sides (3D).
The data is standardized in such a way that the mean length content of the underlying (stationary and isotropic) Poisson line system per unit area (2D) or the mean area content of the underlying (stationary and isotropic) Poisson plane system per unit volume (3D) has the value 1.
The realizations of the random cells on which the data are based were generated using the Julia package: Ballani, F.: RandomCells: Julia package for the generation of random convex polytopes (Version 0.6.3). Rodare (2024). https://doi.org/10.14278/rodare.323
Data publication: Solutal convection in Na-Zn liquid metal batteries and its influence on self-discharge
No full textData for numerical results on the investigations presented in the corresponding research article
UQTestFuns: A Python3 Library of Uncertainty Quantification (UQ) Test Functions
No full textUQTestFuns is an open-source Python3 library of test functions commonly used within the applied uncertainty quantification (UQ) community. Specifically, the package provides:
an implementation with minimal dependencies (i.e., NumPy and SciPy) and a common interface of many test functions
a single entry point collecting test functions and their probabilistic input specifications in a single Python package
an opportunity for an open-source contribution, supporting the implementation of new test functions or posting reference results.
In short, UQTestFuns is an homage to the Virtual Library of Simulation Experiments (VLSE).
v0.5.0 is a minor release that further expands the library of available UQ test functions. This update introduces 14 new test functions, bringing the total to 56
Multiphase Python Repository by HZDR
No full textThe python package provides several routines and scripts required to operate the code and cases repositories containing additional code and set-ups for the open-source software released by the OpenFOAM Foundation. This includes among others utilities for pre- and post-processing of simulation cases, utilities to launch virtual environments containing the source code, and utilities to operate the continuous integration and continuous development environment in a self-hosted Gitlab instance
FVV1455: CFD Simulation of Droplet Separators
No full textFor industrial applications, the two-fluid model is preferred due to its efficient modelling of small-scale interfaces. Whereas, a thin film model, based on a long wave approximation, is used for the unresolved interfaces to obtain the film features by solving the 2D Navier-Stokes equations for wall films. Within the project, the target is to develop an experimentally validated 3D-CFD model to investigate the separation efficiency of droplet separators for fuel cell systems. A hybrid model is developed, which couples the two-fluid model with a thin film model via mass transfer terms for droplet deposition, droplet entrainment and film separation. A two-way coupling between droplets and the thin film is established using mass and momentum source terms, derived analytical and from available experiments. The droplet separator is an essential component of an automotive fuel cell system that segregates a significant amount of liquid fractions from the air-water mixture. The flow dynamics inside a droplet separator consist of a dispersed gas and liquid with a wall adhered thin liquid film. The modelling is divided into the following stages due to the complex fluidic phenomenon inside a generic droplet separator:
Droplet deposition model,
Film separation model,
Film transition model, and
Population balance model.
The numerical simulations are validated and fine-tuned with experiments carried out at HZDR.The research project was self-financed (FVV funding no. 1455) by the FVV e.V