Richard Ho (Njord, UiO): "Minimal Model of Gastruloid Elongation".
Abstract: During morphogenesis, a group of cells can change shape and orientation, including breaking previous global symmetry. Simulations of this process often impose this symmetry breaking on the system, whereas we would like to make these changes emergent from the evolution of the individual cells. We extend a previously developed discrete 3D cell model, which couples the evolution equations of two polarities and position and its simplicity allows the simulation of thousands of interacting cells at reasonable computational cost. With a particular interest on how these results relate to organoids, we examine the presence of these effects on the morphological changes.
Paula Reis (Njord, UiO) : "A model for slow drainage with film-flow effects in porous media".
Abstract: During drainage in porous media, film flow through networks of corners and capillary bridges can establish connections between seemingly isolated defending fluid clusters. Coupled with the drainage through the bulk of pores and throats, the flow through these networks constitutes a secondary drainage mechanism that can significantly affect final fluid configuration and residual saturations. We propose a simple numerical model that incorporates such mechanism by modifying the cluster identification algorithm in an invasion percolation model for drainage. In the model, which represents quasi-2D porous media, wetting-phase-filled sites are considered available to invasion when connected to the liquid outlet directly through successions of pores and throats, or through chains of interconnected capillary bridges. With the proposed model, recently obtained experimental data of drainage of HeleShaw cells filled with spheres were reproduced, showing good qualitative agreement.
Syadhisy Dhanapal (Njord, UiO).
Abstract: Everyone suffers from stress. Rocks, despite being non-living occupants of this planet, are no exception to the case! My research (purposefully) subjects rocks into incredibly “stress”-ful situations and uses X-ray imaging to gain insights into their behaviour.
You will find the schedule for Njord Seminar Series Fall 2023 here.
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