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Thermal signature of salt precipitation at the surface of cylindrical sand columns during evaporation

The top left is sand saturated with pure water serving as a reference. Other columns are sand saturated with identical NaCl solutions. The closer to red indicates the higher temperature. The complex thermal dynamics and patterns observed at the surface of the evolving precipitated salt have notable implications on water evaporation dynamics from porous media.

The above image has been kindly donated for use on this website by Nima Shokri from the Hamburg University of Technology. The video from which this image originated can be viewed in the original LinkedIn post made by Nima Shokri here.

Fluid distribution during immiscible two-phase fluid flow in porous media delineated by direct numerical simulation

The above image has been kindly donated for use on this website by Nima Shokri. This image originates from work performed for the following study, though it was not one of the images actualy published:

Effects of the Pore Morphology on Multiphase Fluid Displacement in Porous Media─A High-Resolution Modeling Investigation

Tannaz Pak, Harris Sajjad Rabbani, Ali Qaseminejad Raeini, and Nima Shokri

DOI: 10.1021/acsomega.2c06295

This paper can be read here.

 

The following photos were all provided by PoreLab - Center of Excellence.

“Dispersion in Fractures with Ramified Patterns” by Le Xu

“Water saturated with gypsum is injected into a radial disk plaster sample with a ramified dissolution pattern. The flow in the aperture above the sample is traced by fluorescence. The traced flow clearly shows the dispersion flowline influenced by the fractal-like initail ramified pattern. The high resolution digital camera recorded the whole injection process.”

(c) 2020 University of Oslo

This image, which is available here, was kindly provided by PoreLab - Center of Excellence.

“It could be so simple” by Joachim Falck Brodin

“Experimental method – development of 3D-scanner, based on index matching. Verification of the segmentation algorithm.”

(c) 2020 University of Oslo

This image, which is available here, was kindly provided by PoreLab - Center of Excellence.

“Alchemy” by Joachim Falck Brodin

“Experimental method – development of 3D-scanner, based on index matching. Trial samples to find index matched glass spheres, fluids and appropriate fluorescent dyes.”

(c) 2020 University of Oslo

This image, which is available here, was kindly provided by PoreLab - Center of Excellence.

“Labyrinth” by Kristian Stølevik Olsen

Large branching patterns like these, called frictional fingers, can appear due to instabilities in frictional fluids. The colors indicate a certain mathematical ordering of the branches into different types depending on how many branching events has happened away from path leading to the exit, shown in bright blue.

(c) 2020 University of Oslo

This image, which is available here, was kindly provided by PoreLab - Center of Excellence.

“Invasion pattern” by Joachim Falck Brodin

“Experimental result – 3D-scanner, based on index matching. Here we see a 3D rendering of the segmented invading fluid phase. The porous medium and the defending fluid have been removed, leaving the invading structure suspended alone.”

(c) 2020 University of Oslo

This image, which is available here, was kindly provided by PoreLab - Center of Excellence.

 

Information on the previous homepage image can be found here.