I am geoscientist with strong interest in high-performance computing (HPC). GPUs and supercomputers permit to investigate previously unsolvable problems at unprecedented resolutions. Recently, I developed GPU-based geophysical applications and designed mid-sized GPU-supercomputers to investigate fluid-rock interactions. My current project aims to better understand the rapid migration of greenhouse gases from sediments towards the atmosphere. Mountains, snow, telemark and cycling get me away from the screen.

Honors & Awards

  • Faculty price for an outstanding PhD thesis, University of Lausanne (2018)
  • Early Postdoc Mobility Fellowship, Swiss National Science Foundation (2018-2019)
  • Outstanding Student PICO and Poster Award (OSPP), division Geodynamics (GD), 2017, European Geoscience Union (EGU) (2017)

Professional Education

  • Ph.D, Université de Lausanne (2018)
  • Master of Science, Université de Lausanne (2013)
  • Bachelor of Science, Université de Lausanne (2011)

All Publications

  • Resolving hydromechanical coupling in two and three dimensions: spontaneous channelling of porous fluids owing to decompaction weakening Geophysical Journal International Räss, L., Duretz, T., Podladchikov, Y. Y. 2019; 218 (3): 1591–1616

    View details for DOI 10.1093/gji/ggz239

  • Spontaneous formation of fluid escape pipes from subsurface reservoirs. Scientific reports Räss, L., Simon, N. S., Podladchikov, Y. Y. 2018; 8 (1): 11116


    Ubiquitous observations of channelised fluid flow in the form of pipes or chimney-like features in sedimentary sequences provide strong evidence for significant transient permeability-generation in the subsurface. Understanding the mechanisms and dynamics for spontaneous flow localisation into fluid conductive chimneys is vital for natural fluid migration and anthropogenic fluid and gas operations, and in waste sequestration. Yet no model exists that can predict how, when, or where these conduits form. Here we propose a physical mechanism and show that pipes and chimneys can form spontaneously through hydro-mechanical coupling between fluid flow and solid deformation. By resolving both fluid flow and shear deformation of the matrix in three dimensions, we predict fluid flux and matrix stress distribution over time. The pipes constitute efficient fluid pathways with permeability enhancement exceeding three orders of magnitude. We find that in essentially impermeable shale (10-19 m2), vertical fluid migration rates in the high-permeability pipes or chimneys approach rates expected in permeable sandstones (10-15 m2). This previously unidentified fluid focusing mechanism bridges the gap between observations and established conceptual models for overcoming and destroying assumed impermeable barriers. This mechanism therefore has a profound impact on assessing the evolution of leakage pathways in natural gas emissions, for reliable risk assessment for long-term subsurface waste storage, or CO2 sequestration.

    View details for DOI 10.1038/s41598-018-29485-5

    View details for PubMedID 30042497

  • Efficient parallel random field generator for large 3-D geophysical problems Computers and Geosciences Räss, L., Kolyukhin, D., Minakov, A. 2019
  • Resolving thermomechanical coupling in two and three dimensions: spontaneous strain localization owing to shear heating Geophysical Journal International Duretz, T., Räss, L., Podladchikov, Y. Y., Schmalholz, S. M. 2019; 216 (1): 365-379

    View details for DOI 10.1093/gji/ggy434

  • Simulation of three-dimensional viscoelastic deformation coupled to porous fluid flow TECTONOPHYSICS Omlin, S., Rass, L., Podladchikov, Y. Y. 2018; 746: 695–701
  • M2Di: Concise and efficient MATLAB 2-D Stokes solvers using the Finite Difference Method GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS Rass, L., Duretz, T., Podladchikov, Y. Y., Schmalholz, S. M. 2017; 18 (2): 755–68
  • Quantification of viscous creep influence on storage capacity of caprock Rass, L., Makhnenko, R. Y., Podladchikov, Y., Laloui, L., Dixon, T., Laloui, L., Twinning, S. ELSEVIER SCIENCE BV. 2017: 3237–46
  • Chimneys, channels, pathway flow or water conducting features - an explanation from numerical modelling and implications for CO2 storage Raess, L., Yarushina, V. M., Simon, N. C., Podladchikov, Y. Y., Dixon, T., Herzog, H., Twinning, S. ELSEVIER SCIENCE BV. 2014: 3761–74