Visitor to PoreLab Oslo – Welcome to Tanguy Le Borgne!

By PoreLab7 November, 2018Visit

Tanguy Le Borgne is Professor (Physicien CNAP) at the University of Rennes 1, France. His research focuses on the study of transport and reaction phenomena in heterogeneous porous and fractured media. He will be visiting PoreLab Oslo next week, arriving on November the 9th for the 2nd national Interpore workshop to be held in Oslo. Welcome!

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On March the 19th, Benoit Cordonnier, researcher at the section of Physics of Geological Processes at UiO, specialist for CT studies in porous media, will give a presentation at 14:00 with the following title: Investigation of porous rocks under X-ray and neutron sources.

Summary:

Investigation of the flow properties in porous rocks is critical for the understanding of groundwater movement, the displacement of contaminants, subsurface waste storage, geothermal energy, enhanced oil and gas recovery, and natural and induced seismicity. Key parameters which control the variability of fluid flow and the movement of dissolved chemical species are i) the local hydraulic conductivity controlled by the porous media characteristics and the evolution of its permeability, and ii) the local adsorption properties of the dissolved chemical species which interacts with the solid matrix. These parameters can be constrained through tomography imaging of rock samples subjected to fluid injection at imposed flow rate and pressure. X-ray imaging allows fine spatial and temporal characterization and is ideal for mechanical tests. Neutron imaging is more oriented to explore the effect of fluid localization in porous materials due to its high sensitivity to hydrogen. However, until recently, this technique was underused in geology because of its large acquisition time.

It is not rare on imaging scientific sites to have both X-rays and neutrons options. However, if most neutron beamlines offer simultaneous X-ray imaging with small commercial sources, there exists not yet a full coupling of synchrotrons and neutron sources. Hence a choice of the method is still required before applying for beamtime. Resolution, experimental conditions, scan frequency and image post-processing are all key-parameter one must consider for selecting the optimal choice.

Here are presented in-situ X-ray and neutron tomographies results of mechanical tests and single-phase flow experiments for various porous rocks (limestone and sandstone) or fractured crystalline rock (granite and peridotite). We discuss the advantages and limits of both methods (hardware characteristics, measurement techniques and post-processing of the data). X-ray tomographies were acquired from the European Synchrotron Radiation Facility. Time-lapse 2D radiographies and 3D neutron tomographies of the samples were acquired on two neutron beamlines (ILL, France and SinQ, Switzerland) and demonstrate the feasibility of in-situ 3D imaging of fluid-rock interactions.

On March the 20th at 13:00, Prof. Dr. rer. nat. Patrick Huber from the Institute of Materials Physics and Technology, Hamburg University of Technology, Germany, will give a presentation on “Soft Matter in Nanoporous Media: From Nanoscale Physics to Metamaterials’ Science“

Cover story for Entropy

The paper from Mariá Barragán, Kim Kristiansen and Signe Kjelstrup entitled "Perspectives on Thermoelectric Energy Conversion in Ion-Exchange Membranes" was selected as the cover story for ENTROPY Volume 20. Read the paper here

Mechanisms of the Flying Chain Fountain

When a chain is released by one end from a container, it forms a striking arch extending well above the container. Watch the video of this curious phenomenon here and read more about the physics behind it here

50th Anniversary of the Nobel Prize to Lars Onsager

On Thursday 22 November, an exhibition on Lars Onsager opened at the Natural Science Library. It is now 50 years since he was awarded the Nobel Prize in Chemistry.

Plan S: På høy tid at dette skjer

Professor og leder for SFF ’en Porelab, Alex Hansen, gir Plan S sin fulle tilslutning. Forslaget om at all offentlig finansiert forskning skal publiseres i tidsskrifter med åpen tilgang er eneste riktige, slår han fast.

The Sound of Science