Dr. Lukas Keller

ZHAW School of Engineering
ICP Multiphysics Modeling and Imaging
Technikumstrasse 71
8400 Winterthur

+41 (0) 58 934 77 78
lukas.keller@zhaw.ch

Projects

Characterisation of material changes during the sealing of water-exposed fractures in clay rock / Project leader / completed
CAPACITIVE – XCT Data of Opalinus Clay Clay and microstructural investigations / Project leader / completed
EURAD-WP-Gas: Mechanistic understanding of gas transport in clay materials / Project leader / completed

Publications

Articles in scientific journal, peer-reviewed

Keller, L. M., Seiphoori, A., Marschall, P., & Giger, S. (2026). Swelling-induced fracture closure in Opalinus Clay : an inert particle tracking approach. Applied Clay Science, 284(108134). https://doi.org/10.1016/j.clay.2026.108134
Keller, L. M. (2023). XCT analysis of drill cores of Opalinus clay and determination of sample size for effective properties evaluation. Frontiers in Earth Science, 11(1177408). https://doi.org/10.3389/feart.2023.1177408
Liu, L., Giger, S., Martin, D., Chalaturnyk, R., Schuster, K., Deisman, N., & Keller, L. (2022). In-situ shear modulus determination by pressuremeter tests in opalinus clay and reconciliation with laboratory tests. Rock Mechanics and Rock Engineering, 55(8), 4615–4635. https://doi.org/10.1007/s00603-022-02873-0
Keller, L. M. (2022). The hydromechanical behavior of opalinus clay fractures : combining roughness measurements with computer simulations. Frontiers in Earth Science, 10(945377). https://doi.org/10.3389/feart.2022.945377
Keller, L. M. (2021). 3D pore microstructures and computer simulation : effective permeabilities and capillary pressure during drainage in Opalinus Clay. Oil & Gas Science and Technology – Revue d’IFP Energies Nouvelles, 76(44). https://doi.org/10.2516/ogst/2021027
Keller, L. M., & Giger, S. B. (2019). Petrophysical properties of opalinus clay drill cores determined from Med-XCT images. Geotechnical and Geological Engineering, 37(4), 3507–3522. https://doi.org/10.1007/s10706-019-00815-2
Eidel, B., Gote, A., Ruby, M., Holzer, L., Keller, L., & Jiang, X. (2019). Estimating the effective elasticity properties of a diamond/β-SiC composite thin film by 3D reconstruction and numerical homogenization. Diamond and Related Materials, 97. https://doi.org/10.1016/j.diamond.2019.04.029
Keller, L., & Holzer, L. (2018). Image-based upscaling of permeability in opalinus clay. Journal of Geophysical Research: Solid Earth, 123(1), 285–295. https://doi.org/10.1002/2017JB014717
Keller, L. M., Schwiedrzik, J. J., Gasser, P., & Michler, J. (2017). Understanding anisotropic mechanical properties of shales at different length scales : in situ micropillar compression combined with finite element calculations. Journal of Geophysical Research: Solid Earth, 122(8), 5945–5955. https://doi.org/10.1002/2017JB014240
Keller, L. M. (2016). Porosity anisotropy of Opalinus Clay : implications for the poroelastic behaviour. Geophysical Journal International, 208(3), 1443–1448. https://doi.org/10.1093/gji/ggw469
Marschall, P., Keller, L., Giger, S. B., & Becker, J. (2016). Microstructural insights into the petrophysical characteristics of indurated clays. CMS Workshop Lectures, 21, 191–198. https://doi.org/10.1346/CMS-WLS-21.14
Keller, L. M. (2016). Pore geometry effects on elastic properties of Opalinus Clay. Geophysics, 81(5), D543–D551. https://doi.org/10.1190/geo2015-0452.1
Keller, L. M., Holzer, L., Gasser, P., Erni, R., & Rossell, M. D. (2015). Intergranular pore space evolution in MX80 bentonite during a long-term experiment. Applied Clay Science, 104, 150–159. https://doi.org/10.1016/j.clay.2014.11.024
Keller, L. M., Hilger, A., & Manke, I. (2015). Impact of sand content on solute diffusion in Opalinus Clay. Applied Clay Science, 112-113, 134–142. https://doi.org/10.1016/j.clay.2015.04.009
Keller, L. M., Jobmann, M., Schuetz, P., & Gasser, P. (2014). On the potential of tomographic methods when applied to compacted crushed rock salt. Transport in Porous Media, 104(3), 607–620. https://doi.org/10.1007/s11242-014-0355-y
Keller, L., Seiphoori, A., Gasser, P., Lucas, F., Holzer, L., & Ferrari, A. (2014). The pore structure of compacted and partly saturated MX-80 bentonite at different dry densities. Clays and Clay Minerals, 62(3), 174–187. https://doi.org/10.1346/CCMN.2014.0620302
Holzer, L., Iwanschitz, B., Hocker, T., Keller, L., Pecho, O., Sartoris, G., Gasser, P., & Muench, B. (2013). Redox cycling of Ni-YSZ anodes for solid oxide fuel cells: influence of tortuosity, constriction and percolation factors on the effective transport properties. Journal of Power Sources, 242, 179–194. https://doi.org/10.1016/j.jpowsour.2013.05.047
Holzer, L., Wiedenmann, D., Münch, B., Keller, L., Prestat, M., Gasser, P., Robertson, I., & Grobéty, B. (2013). The influence of constrictivity on the effective transport properties of porous layers in electrolysis and fuel cells. Journal of Materials Science, 48(7), 2934–2952. https://doi.org/10.1007/s10853-012-6968-z
Wiedenmann, D., Keller, L., Holzer, L., Stojadinović, J., Münch, B., Suarez, L., Fumey, B., Hagendorfer, H., Brönnimann, R., Modregger, P., Gorbar, M., Vogt, U. F., Züttel, A., La Mantia, F., Wepf, R., & Grobéty, B. (2013). Three-dimensional pore structure and ion conductivity of porous ceramic diaphragms. AIChE Journal, 59(5), 1446–1457. https://doi.org/10.1002/aic.14094
Keller, L. M., Holzer, L., Schuetz, P., & Gasser, P. (2013). Pore space relevant for gas permeability in Opalinus clay : statistical analysis of homogeneity, percolation, and representative volume element. Journal of Geophysical Research: Solid Earth, 118(6), 2799–2812. https://doi.org/10.1002/jgrb.50228
Keller, L. M., Schuetz, P., Erni, R., Rossell, M. D., Lucas, F., Gasser, P., & Holzer, L. (2013). Characterization of multi-scale microstructural features in Opalinus Clay. Microporous and Mesoporous Materials, 170, 83–94. https://doi.org/10.1016/j.micromeso.2012.11.029
Keller, L. M., Holzer, L., Wepf, R., Gasser, P., Münch, B., & Marschall, P. (2011). On the application of focused ion beam nanotomography in characterizing the 3D pore space geometry of Opalinus clay. Physics and Chemistry of the Earth, Parts A/B/C, 36(17-18), 1539–1544. https://doi.org/10.1016/j.pce.2011.07.010
Keller, L., Holzer, L., Wepf, R., & Gasser, P. (2011). 3D geometry and topology of pore pathways in Opalinus clay : implications for mass transport. Applied Clay Science, 52(1-2), 85–95. https://doi.org/10.1016/j.clay.2011.02.003

Other publications

Giger, S. B., Ewy, R. T., Favero, V., Stankovic, R., & Keller, L. M. (2018). Consolidated-undrained triaxial testing of Opalinus Clay : results and method validation. Geomechanics for Energy and the Environment, 14, 16–28. https://doi.org/10.1016/j.gete.2018.01.003
Keller, L. (2015). On the representative elementary volumes of clay rocks at the mesoscale. Journal of Geology and Mining Research, 7(6), 58–64. https://doi.org/10.5897/JGMR2015.0224

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