MEchanics GAthering -MEGA- Seminar: Biological and chemical activities in confined flows: the role of physical heterogeneity and segregation


Event details

Date and time 25.10.2018 16:1517:30  
Place and room
Speaker Pietro de AnnaISTEUNIL
Category Conferences - Seminars
Abstract Within the shallow subsurface, soil, rock, fluids, gases and living organisms are in close interaction: the macroscopic resulting phenomena derive from the coupling between fluid flow, solutes mixing and microorganisms displacement, growth and adaptation. The common challenge in all these processes is their spatial variability (heterogeneity). The consequent complexity that rises from the coupling of these processes makes predictions, based on rates measured under homogeneized, well-mixed conditions different by orders of magnitudes from laboratory and field observations. The aim of my research is the investigation of the coupling between non uniform flows through confined micro-structures and the activity of biotic and a-biotic components of the subsurface. This is done with theoretical and numerical modelling combined with experiments with microfluidics devices and time-lapse video-microscopy.

Bio I am a physicist, I got a Master from the university of Florence (Italy) in Statistical Mechanics and PhD in Geosciences from the University of Rennes 1 (Brittany, France), where I studied mixing and reactions in porous media flows. I was a postdoctoral fellow at MIT (Boston, US), where I learned and developed microfluidics and microscopy techniques for porous media flows investigation. Since 2015 I am an assistant professor (tenure track) at the Institute of Earth Sciences (ISTE) of the University of Lausanne (UNIL). I am interested in the physics of flow and mixing-driven processes in confined micro-structures, like filters and soil, with particular attention to their coupling with biological activities.

Practical information

  • General public
  • Free


  • MEGA.Seminar Organizing Committee



Solids Structures Fluids