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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Professor Wojciech Debski, head of the department of Theoretical Geophysics at the Polish Academy of Sciences, will visit PoreLab on January the 18^th and will give a seminar entitled “Time Reversal method, from mathematical principles to waveform analysis applications”. The lecture will take place at our PoreLab premises (PTS2, second floor) on January the 18^th from 13 to 14.

Marcel Moura, postdoctoral fellow at the department of Physics, University of Oslo, will present on January the 23rd at 13:00 a paper on:

Unconventional transport mechanisms in porous media: connectivity enhancement due to thin film flow.

Authors are: Marcel Moura¹, Knut Jørgen Måløy¹, Eirik Grude Flekkøy¹, Gerhard Schäfer² and Renaud Toussaint^1,3

1.PoreLab, The Njord Center, Department of Physics, University Oslo, Norway,

2.LHyGeS, CNRS, University of Strasbourg, France,

3.IPGS, CNRS, University of Strasbourg, France

Abstract:

The standard liquid transport processes in porous media happen through the usual network of interconnected pore bodies and pore throats (here called the primary network). When a non-wetting phase displaces a wetting phase from a porous sample (drainage), thin films of the wetting phase are bound to be left on the surface of the constituting grains (for example when air displaces water from a porous rock, thin films of water are left behind, covering the rock grains). Under certain conditions, isolated liquid films can eventually merge, forming a secondary network of interconnected films and capillary bridges that can effectively enhance the overall connectivity of the medium and act as a new pathway for fluid transport. We have performed experiments using transparent networks with the objective of studying these unconventional transport processes. After the usual drainage process, a set of trapped liquid clusters remains in the sample, but we observe that a small portion of them can surprisingly still be drained. This kind of unconventional drainage event can only be possible due to the enhanced connectivity introduced by the secondary network of thin films and capillary bridges. We have observed the existence of an active zone behind the main drainage front where the probability of these unconventional drainage events is maximized.

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