Experimental investigation of fluid chemistry effect on adhesive properties of Calcite grains

My PhD project was an experimental study of the effect of pore fluid chemistry on calcite and calcite-bearing rocks. The result of this project has a strong impact in enhanced oil recovery and CO2 sequestration. The main objective was quantifying the short range forces between calcite grains that are affected by the fluid chemistry. My main tools were Atomic Force Microscopy (AFM) and Surface Force Apparatus (SFA). This project was funded by the National IOR Centre of Norway. The entire experimental work was performed at the Physics department, University of Oslo.

Here is the list of my publications:

Janssen's length scale for granular packing in a tube with moving and inclined walls

The whole idea was measuring the Janssen length scale in an experimental investigation in parallel to a simulation study. There are two cases to be studied here, while tube walls are moving, 1) horizontal tube , 2) inclined tube with small angle for identical size glass beads. I had a real honour of working in Prof. Knut Jørgen Måloy's group in the Advanced material and complex systems , Physics department , University of Oslo . Through which I received loads of scientific support also from Dr. Benjy Marks and Dr. Guillaume Dumazer.

Dynamics of particles in a thin drying colloidal film

As a thin colloidal film (e.g., spilled wine or a painted wall) dries, it turns to either a uniform flat surface or deposit at the edges, the so-called coffee ring effect . Interestingly, the main dynamical processes responsible for the final pattern of the lateral dried film occurs in a small region, where particles evolve from the liquid phase to the solid phase, i.e., the transition region. The width of the transition region, as a natural length scale, leads to understand the shape of the final dried film. As an experimental study, we, my former supervisor Dr. Lucas Goehring and I, were observing a thin colloidal film as it solidifies. We applied the particle image velocimetry (PIV) method through the transition region, during the drying process. Targeting the dynamical processes in the transition region helps our understanding of occurrence of phenomena to the colloidal particles, while we wait for the paint, on the wall, to dry completely.

There are many publications on this subject. Couple helpful ones in understanding of what I was working on can be listed as,

Continuum theory of nano-scale pattern formation on a solid surface, under ion-beam erosion

When a flat solid surface is bombarded by low-energy ions a generation of spontanous pattern, in nano-scale, develops on the surface. These remarkable patterns can appear as either ripples or conical modulations. As my master project, I, supervised by Prof. Reiner Kree , studied a method, based on continuum theory, to produce a clear self-organized pattern, ripples, on Si surface. This study followed the remarkable work of Mark Bradley and his colleague J. M. E. Harper, Bradley-Harper (BH) theory.