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Weinhardt, Felix

M.Sc.

Felix Weinhardt

Academic Staff
Institute for Modelling Hydraulic and Environmental Systems
Department of Hydromechanics and Modelling of Hydrosystems

Contact

+49 711 685-60103
+49 711 685-60430
Email
Business card (VCF)

Pfaffenwaldring 61
70569 Stuttgart
Germany
Room: 1.011

Office Hours

By appointment only

Teaching

Fluidmechanik 1 Lecture | Exercise
Fluidmechanik 2 Lecture | Exercise

Vita

Abitur

May 2011 in Bad Neustadt, Rhön-Gymnasium (Germany)

Academic Degrees

2016: B.Sc. in Environmental Engineering, University of Stuttgart (Germany)
2018: M.Sc. in Environmental Engineering, University of Stuttgart (Germany)

Academic Career

since 2018: Doctoral Researcher within SFB 1313, Institute for Modelling Hydraulic and Environmental Systems, University of Stuttgart (Germany)

Publications

(Journal-) Articles
1. von Wolff, L., Weinhardt, F., Class, H., Hommel, J., & Rohde, C. (2021). Investigation of Crystal Growth in Enzymatically Induced Calcite Precipitation by Micro-Fluidic Experimental Methods and Comparison with Mathematical Modeling. Transport in Porous Media, 137(2), Article 2. https://doi.org/10.1007/s11242-021-01560-y
  Abstract
  Enzymatically induced calcite precipitation (EICP) is an engineering technology that allows for targeted reduction of porosity in a porous medium by precipitation of calcium carbonates. This might be employed for reducing permeability in order to seal flow paths or for soil stabilization. This study investigates the growth of calcium-carbonate crystals in a micro-fluidic EICP setup and relies on experimental results of precipitation observed over time and under flow-through conditions in a setup of four pore bodies connected by pore throats. A phase-field approach to model the growth of crystal aggregates is presented, and the corresponding simulation results are compared to the available experimental observations. We discuss the model's capability to reproduce the direction and volume of crystal growth. The mechanisms that dominate crystal growth are complex depending on the local flow field as well as on concentrations of solutes. We have good agreement between experimental data and model results. In particular, we observe that crystal aggregates prefer to grow in upstream flow direction and toward the center of the flow channels, where the volume growth rate is also higher due to better supply.
  BibTeX
  @article{vonWolff2021-Weinhardt, abstract = {Enzymatically induced calcite precipitation (EICP) is an engineering technology that allows for targeted reduction of porosity in a porous medium by precipitation of calcium carbonates. This might be employed for reducing permeability in order to seal flow paths or for soil stabilization. This study investigates the growth of calcium-carbonate crystals in a micro-fluidic EICP setup and relies on experimental results of precipitation observed over time and under flow-through conditions in a setup of four pore bodies connected by pore throats. A phase-field approach to model the growth of crystal aggregates is presented, and the corresponding simulation results are compared to the available experimental observations. We discuss the model's capability to reproduce the direction and volume of crystal growth. The mechanisms that dominate crystal growth are complex depending on the local flow field as well as on concentrations of solutes. We have good agreement between experimental data and model results. In particular, we observe that crystal aggregates prefer to grow in upstream flow direction and toward the center of the flow channels, where the volume growth rate is also higher due to better supply.}, author = {von Wolff, Lars and Weinhardt, Felix and Class, Holger and Hommel, Johannes and Rohde, Christian}, day = 24, doi = {10.1007/s11242-021-01560-y}, issn = {1573-1634}, journal = {Transport in Porous Media}, month = {02}, number = 2, publisher = {Springer Science and Business Media LLC}, title = {Investigation of Crystal Growth in Enzymatically Induced Calcite Precipitation by Micro-Fluidic Experimental Methods and Comparison with Mathematical Modeling}, url = {https://doi.org/10.1007/s11242-021-01560-y}, volume = 137, year = 2021 }
  Link
  https://doi.org/10.1007/s11242-021-01560-y
2. Wagner, A., Eggenweiler, E., Weinhardt, F., Trivedi, Z., Krach, D., Lohrmann, C., Jain, K., Karadimitriou, N., Bringedal, C., Voland, P., Holm, C., Class, H., Steeb, H., & Rybak, I. (2021). Permeability Estimation of Regular Porous Structures: A Benchmark for Comparison of Methods. Transport in Porous Media, 138(1), 1–23. https://doi.org/10.1007/s11242-021-01586-2
  - BibTeX
  - Link
  BibTeX
  @article{lh2-2021-weinhardt-benchmark, author = {Wagner, Arndt and Eggenweiler, Elissa and Weinhardt, Felix and Trivedi, Zubin and Krach, David and Lohrmann, Christoph and Jain, Kartik and Karadimitriou, Nikolaus and Bringedal, Carina and Voland, Paul and Holm, Christian and Class, Holger and Steeb, Holger and Rybak, Iryna}, doi = {10.1007/s11242-021-01586-2}, journal = {Transport in Porous Media}, month = {04}, number = 1, pages = {1-23}, title = {Permeability Estimation of Regular Porous Structures: A Benchmark for Comparison of Methods}, url = {https://doi.org/10.1007/s11242-021-01586-2}, volume = 138, year = 2021 }
  Link
  https://doi.org/10.1007/s11242-021-01586-2
3. Weinhardt, F., Class, H., Dastjerdi, S. V., Karadimitriou, N., Lee, D., & Steeb, H. (2021). Experimental Methods and Imaging for Enzymatically Induced Calcite Precipitation in a microfluidic cell. Water Resources Research, 57, e2020WR029361. https://doi.org/doi.org/10.1029/2020WR029361
  Abstract
  Abstract Enzymatically induced calcite precipitation (EICP) in porous media can be used as an engineering option to achieve precipitation in the pore space, for example, aiming at a targeted sealing of existing flow paths. This is accomplished through a porosity and consequent permeability alteration. A major source of uncertainty in modeling EICP is in the quantitative description of permeability alteration due to precipitation. This report presents methods for investigating experimentally the time-resolved effects of growing precipitates on porosity and permeability on the pore scale, in a poly-di-methyl-siloxane microfluidic flow cell. These methods include the design and production of the microfluidic cells, the preparation and usage of the chemical solutions, the injection strategy, and the monitoring of pressure drops for given fluxes for the determination of permeability. EICP imaging methods are explained, including optical microscopy and X-ray microcomputed tomography (XRCT), and the corresponding image processing and analysis. We present and discuss a new experimental procedure using a microfluidic cell, as well as the general perspectives for further experimental and numerical simulation studies on induced calcite precipitation. The results of this study show the enormous benefits and insights achieved by combining both light microscopy and XRCT with hydraulic measurements in microfluidic chips. This allows for a quantitative analysis of the evolution of precipitates with respect to their size and shape, while monitoring their influence on permeability. We consider this to be an improvement of the existing methods in the literature regarding the interpretation of recorded data (pressure, flux, and visualization) during pore morphology alteration.
  BibTeX
  @article{Weinhardtetal2021, abstract = {Abstract Enzymatically induced calcite precipitation (EICP) in porous media can be used as an engineering option to achieve precipitation in the pore space, for example, aiming at a targeted sealing of existing flow paths. This is accomplished through a porosity and consequent permeability alteration. A major source of uncertainty in modeling EICP is in the quantitative description of permeability alteration due to precipitation. This report presents methods for investigating experimentally the time-resolved effects of growing precipitates on porosity and permeability on the pore scale, in a poly-di-methyl-siloxane microfluidic flow cell. These methods include the design and production of the microfluidic cells, the preparation and usage of the chemical solutions, the injection strategy, and the monitoring of pressure drops for given fluxes for the determination of permeability. EICP imaging methods are explained, including optical microscopy and X-ray microcomputed tomography (XRCT), and the corresponding image processing and analysis. We present and discuss a new experimental procedure using a microfluidic cell, as well as the general perspectives for further experimental and numerical simulation studies on induced calcite precipitation. The results of this study show the enormous benefits and insights achieved by combining both light microscopy and XRCT with hydraulic measurements in microfluidic chips. This allows for a quantitative analysis of the evolution of precipitates with respect to their size and shape, while monitoring their influence on permeability. We consider this to be an improvement of the existing methods in the literature regarding the interpretation of recorded data (pressure, flux, and visualization) during pore morphology alteration.}, author = {Weinhardt, Felix and Class, Holger and Dastjerdi, Samaneh Vahid and Karadimitriou, Nikolaos and Lee, Dongwon and Steeb, Holger}, doi = {doi.org/10.1029/2020WR029361}, eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2020WR029361}, journal = {Water Resources Research}, month = {03}, note = {e2020WR029361 2020WR029361}, pages = {e2020WR029361}, publisher = {American Geophysical Union (AGU)}, title = {Experimental Methods and Imaging for Enzymatically Induced Calcite Precipitation in a microfluidic cell}, url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020WR029361}, volume = 57, year = 2021 }
  Link
  https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020WR029361
4. Koch, T., Gläser, D., Weishaupt, K., Ackermann, S., Beck, M., Becker, B., Burbulla, S., Class, H., Coltman, E., Emmert, S., Fetzer, T., Grüninger, C., Heck, K., Hommel, J., Kurz, T., Lipp, M., Mohammadi, F., Scherrer, S., Schneider, M., … Flemisch, B. (2020). DuMux 3 – an open-source simulator for solving flow and transport problems in porous media with a focus on model coupling. Computers & Mathematics with Applications. https://doi.org/10.1016/j.camwa.2020.02.012
  Abstract
  We present version 3 of the open-source simulator for flow and transport processes in porous media DuMux. DuMux is based on the modular C++ framework Dune (Distributed and Unified Numerics Environment) and is developed as a research code with a focus on modularity and reusability. We describe recent efforts in improving the transparency and efficiency of the development process and community-building, as well as efforts towards quality assurance and reproducible research. In addition to a major redesign of many simulation components in order to facilitate setting up complex simulations in DuMux, version 3 introduces a more consistent abstraction of finite volume schemes. Finally, the new framework for multi-domain simulations is described, and three numerical examples demonstrate its flexibility.
  BibTeX
  @article{Kochetal2020JCP1d3dkernel, abstract = {We present version 3 of the open-source simulator for flow and transport processes in porous media DuMux. DuMux is based on the modular C++ framework Dune (Distributed and Unified Numerics Environment) and is developed as a research code with a focus on modularity and reusability. We describe recent efforts in improving the transparency and efficiency of the development process and community-building, as well as efforts towards quality assurance and reproducible research. In addition to a major redesign of many simulation components in order to facilitate setting up complex simulations in DuMux, version 3 introduces a more consistent abstraction of finite volume schemes. Finally, the new framework for multi-domain simulations is described, and three numerical examples demonstrate its flexibility.}, author = {Koch, Timo and Gl\"{a}ser, Dennis and Weishaupt, Kilian and Ackermann, Sina and Beck, Martin and Becker, Beatrix and Burbulla, Samuel and Class, Holger and Coltman, Edward and Emmert, Simon and Fetzer, Thomas and Gr\"{u}ninger, Christoph and Heck, Katharina and Hommel, Johannes and Kurz, Theresa and Lipp, Melanie and Mohammadi, Farid and Scherrer, Samuel and Schneider, Martin and Seitz, Gabriele and Stadler, Leopold and Utz, Martin and Weinhardt, Felix and Flemisch, Bernd}, doi = {10.1016/j.camwa.2020.02.012}, issn = {0898-1221}, journal = {Computers {\&} Mathematics with Applications}, month = {03}, publisher = {Elsevier {BV}}, title = {{DuMux} 3 {\textendash} an open-source simulator for solving flow and transport problems in porous media with a focus on model coupling}, url = {https://doi.org/10.1016/j.camwa.2020.02.012}, year = 2020 }
  Link
  https://doi.org/10.1016/j.camwa.2020.02.012
5. Koch, T., Gläser, D., Weishaupt, K., Ackermann, S., Beck, M., Becker, B., Burbulla, S., Class, H., Coltman, E., Fetzer, T., Flemisch, B., Grüninger, C., Heck, K., Hommel, J., Kurz, T., Lipp, M., Mohammadi, F., Schneider, M., Seitz, G., … Weinhardt, F. (2018). DuMuX 3.0.0. https://doi.org/10.5281/zenodo.2479595
  - BibTeX
  BibTeX
  @article{koch2018dumux, author = {Koch, Timo and Gläser, Dennis and Weishaupt, Kilian and Ackermann, Sina and Beck, Martin and Becker, Beatrix and Burbulla, S. and Class, Holger and Coltman, Edward and Fetzer, Thomas and Flemisch, Bernd and Grüninger, Christoph and Heck, Katharina and Hommel, Johannes and Kurz, Theresa and Lipp, Melanie and Mohammadi, Farid and Schneider, Martin and Seitz, Gabriele and Scholz, Simon and Weinhardt, Felix}, doi = {10.5281/zenodo.2479595}, title = {DuMuX 3.0.0}, year = 2018 }
Datasets
1. Weinhardt, F., Class, H., Vahid Dastjerdi, S., Karadimitriou, N., Lee, D., & Steeb, H. (2021). Optical Microscopy and pressure measurements of Enzymatically Induced Calcite Precipitation (EICP) in a microfluidic cell. DaRUS. https://doi.org/10.18419/darus-818
  - BibTeX
  - Link
  BibTeX
  @dataset{darus-Weinhardtetal2021, author = {Weinhardt, Felix and Class, Holger and Vahid Dastjerdi, Samaneh and Karadimitriou, Nikolaos and Lee, Dongwon and Steeb, Holger}, doi = {10.18419/darus-818}, publisher = {DaRUS}, title = {Optical Microscopy and pressure measurements of Enzymatically Induced Calcite Precipitation (EICP) in a microfluidic cell}, url = {https://doi.org/10.18419/darus-818}, version = {V1}, year = 2021 }
  Link
  https://doi.org/10.18419/darus-818
2. Vahid Dastjerdi, S., Steeb, H., Ruf, M., Lee, D., Weinhardt, F., Karadimitriou, N., & Class, H. (2021). micro-XRCT dataset of Enzymatically Induced Calcite Precipitation (EICP) in a microfluidic cell. DaRUS. https://doi.org/10.18419/darus-866
  - BibTeX
  - Link
  BibTeX
  @dataset{darus-Dastjerditetal2021, author = {Vahid Dastjerdi, Samaneh and Steeb, Holger and Ruf, Matthias and Lee, Dongwon and Weinhardt, Felix and Karadimitriou, Nikolaos and Class, Holger}, doi = {10.18419/darus-866}, publisher = {DaRUS}, title = {micro-XRCT dataset of Enzymatically Induced Calcite Precipitation (EICP) in a microfluidic cell}, url = {https://doi.org/10.18419/darus-866}, version = {V1}, year = 2021 }
  Link
  https://doi.org/10.18419/darus-866
Theses
1. Weinhardt, F. (2018). Experimental and numerical investigation of enzymatically induced calcite precipitation in porous media [Masterthesis].
  - BibTeX
  BibTeX
  @mastersthesis{NULL, author = {Weinhardt, Felix}, month = {09}, note = {, IWS2ID=4554 , Institution: Institut für Wasser- und Umweltsystemmodellierung , Address: Universität Stuttgart , Partnerinstitution: Institut für Mechanik (Bauwesen) , Partneraddress: Universität Stuttgart }, school = {Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung}, title = {Experimental and numerical investigation of enzymatically induced calcite precipitation in porous media}, type = {Masterthesis}, year = 2018 }
2. Weinhardt, F. (2016). Algorithmus zur Zeitschrittweitenanpassung für das linear elastische Modell [Bachelorarbeit]. Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung.
  - BibTeX
  BibTeX
  @mastersthesis{NULL, author = {Weinhardt, Felix}, month = {05}, note = {, IWS2ID=4398 , Institution: Institut für Wasser- und Umweltsystemmodellierung , Address: Universität Stuttgart }, school = {Universität Stuttgart, Institut für Wasser- und Umweltsystemmodellierung}, title = {Algorithmus zur Zeitschrittweitenanpassung für das linear elastische Modell }, type = {Bachelorarbeit}, year = 2016 }

Talks

2021
1. F. Weinhardt, L. von Wolff, J. Hommel, Ch. Rohde, and H. Class, “Investigation of crystal growth in Enzymatically Induced Calcite Precipitation by microfluidic experiments and mathematical modelling,” CrysPoM VII : 7th International Workshop on Crystallization in Porous Media, 07.09.21 - 09.06.21 Pau/online. Jun. 2021. [Online]. Available: https://cryspom7.sciencesconf.org/
  - BibTeX
  - Link
  BibTeX
  @misc{Weinhardt-Cryspom-2021, author = {Weinhardt, Felix and von Wolff, Lars and Hommel, Johannes and Rohde, CHristian and Class, Holger}, booktitle = {CrysPoM VII : 7th International Workshop on Crystallization in Porous Media, 07.09.21 - 09.06.21 Pau/online}, month = {6}, title = {Investigation of crystal growth in Enzymatically Induced Calcite Precipitation by microfluidic experiments and mathematical modelling}, type = {Konferenzbeitrag}, url = {https://cryspom7.sciencesconf.org/}, year = 2021 }
  Link
  https://cryspom7.sciencesconf.org/
2. F. Weinhardt, H. Class, S. Vahid Dastjerdi, R. Gerlach, N. Karadimitriou, and H. Steeb, “Experimental Methods and Imaging for Enzymatically Induced Calcite Precipitation in micro-fluidic devices,” Interpore German Chapter 01.02.2021-02.02.2021, Stuttgart/online. Feb. 2021.
  - BibTeX
  BibTeX
  @misc{Weinhardt-interporeGermanChapter-2021, author = {Weinhardt, Felix and Class, Holger and Vahid Dastjerdi, Samaneh and Gerlach, Robin and Karadimitriou, Nikolaos and Steeb, Holger}, booktitle = {Interpore German Chapter 01.02.2021-02.02.2021, Stuttgart/online}, month = {2}, title = {Experimental Methods and Imaging for Enzymatically Induced Calcite Precipitation in micro-fluidic devices}, type = {Konferenzbeitrag}, year = 2021 }
2020
1. F. Weinhardt, H. Class, S. Vahid Dastjerdi, R. Gerlach, N. Karadimitriou, and H. Steeb, “Experimental Methods and Imaging for Enzymatically Induced Calcite Precipitation in micro-fluidic devices,” Interpore 12th Annual Meeting and Jubilee 2020, 30.08.2020 - 04.09.2020, Qingdao/online. Sep. 2020.
  - BibTeX
  BibTeX
  @misc{Weinhardt-interpore-2020, author = {Weinhardt, Felix and Class, Holger and Vahid Dastjerdi, Samaneh and Gerlach, Robin and Karadimitriou, Nikolaos and Steeb, Holger}, booktitle = {Interpore 12th Annual Meeting and Jubilee 2020, 30.08.2020 - 04.09.2020, Qingdao/online}, month = {9}, title = {Experimental Methods and Imaging for Enzymatically Induced Calcite Precipitation in micro-fluidic devices}, type = {Konferenzbeitrag}, year = 2020 }

Posters

2021
1. F. Weinhardt et al., “The evolution of preferential flow paths during Enzymatically Induced Calcite Precipitation and its effect on the permeability,” Interpore 13th Annual Meeting (31.05.2021-04.06.2021), online. Jun. 2021.
  - BibTeX
  BibTeX
  @misc{Weinhardt-interpore-2021, author = {Weinhardt, Felix and Deng, Jingxuan and Karadimitriou, Nikolaos and Hommel, Johannes and Gerlach, Robin and Class, Holger and Steeb, Holger}, booktitle = {Interpore 13th Annual Meeting (31.05.2021-04.06.2021), online}, month = {6}, title = {The evolution of preferential flow paths during Enzymatically Induced Calcite Precipitation and its effect on the permeability}, type = {Poster Session}, year = 2021 }

Supervised student assignements

Experimental Investigation on the Impact of Induced Calcite Precipitation on Two-Phase Flow. (2021). (Bachalorarbeit).
Experimentelle Untersuchung von mikrobiologisch induzierter Kalkausfällung in mikrofluidischen Zellen. (2021). (Bachalorarbeit).
Experimental and numerical investigation of tracer transport in porous media on the pore scale. (2019). (Masterarbeit). Universität Stuttgart, Institut für Wasser-und Umweltsystemmodellierung, Lehrstuhl für Hydromechanik und Hydrosystemmodellierung.

Current research projects

SFB 1313, C04: Control-volume-based approaches to model flow and transport in fractured/fracturing porous media including biological and chemical pore-space alteration
Duration: 01/2018 - 12/2021
Department: LH2
Leader: Holger Class
Funding: DFG

Felix Weinhardt

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