Tidligere arrangementer - Side 7
What we talk about when we talk about Yiddish: Anita Christensen discusses revitalization, transvaluation and representation of Yiddish in contemporary Sweden
Multiphase flow in pipes is very complex due to the large number of parameters involved. Differences in phase combinations (e.g. gas-liquid-liquid) and inclination angle can significantly affect the flow regime within the pipe. This in turn can lead to differences in demand on pressure support systems or other facilities. Therefore, accurate estimation of the flow behaviour is crucial for equipment design and operational safety of the production. In this talk, various experimental measurement techniques for monitoring multiphase flow in pipes will be discussed that are currently in use at the Well Flow Loop installation at IFE, Kjeller. In addition, some results from the ongoing research project focusing on flow in steeply inclined pipes will be shown.
Raelyn Sullivan, Institute of Theoretical Astrophysics, UiO
Welcome to the AtLAST Forum, a platform for the community to exchange ideas and opinions about the AtLAST project and anything related to it.
Based on the preprint Bhatt, Iyengar, Ma - Regular rings and perfectoid algebras. Notes for the lecture here.
Department seminar. Jette Bredahl Jacobsen is a Professor at the Department of Food and Resource Economics at the University of Copenhagen. She will present the paper "Incorporating biodiversity into net national income".
Zooplankton in Meromictic Lakes: Vertical Distribution and Seasonal Dynamics
In this lecture Dr. Julia Christine Marinaccio will discuss how overseas constituencies of non-resident citizens have become disenfranchised is rooted in nationalism and Taiwan's intricate relationship with China.
Victoria Marie Mostue (IFIKK)
Dean Karlan is the Frederic Esser Nemmers Distinguished Professor of Economics and Finance at Northwestern University and earlier Chief Economist of USAID. He will prsent the paper "Unconditional cash transfers: A Bayesian meta-analysis of randomized evaluations in low and middle income countries" (written with Tommaso Crosta, Finley Ong, Julius Rüschenp?hler, and Christopher R. Udry).
Department seminar. Jacopo Bizzotto is an Associate Professor of Economics at OsloMet. He will present the paper "Design and Sale of Market Segments" (written with Jesper Rüdiger and Stefan Terstiege).
By Eric Thomas, University of the Pacific, Stockton, California
Modulation of gene expression in foraminifera exposed to contaminants
Camilla Lee presents preliminary findings from her PhD project on emotional self-regulating strategies and writing processes, and she discusses ways to conceptualize well-being in the context of second language writing.
Actor Mads Ousdal will talk about his experience with playing Alfred Allmers in Ibsen's Little Eyolf.
QOMBINE seminar by H?kon R. Fredheim (University of Oslo)
Department seminar. Zack Grossman is an Associate Professor of economics at UC Merced. He will present the paper "Incentivizing agents with image concern".
The Departmental Seminar Series features researcher Carl Rommel, Department of Cultural Anthropology and Ethnology, Uppsala Universitet
Fyrste litter?re instituttseminar denne v?ren er med professor Ronny Spaans og om Olav Nygard sitt forfattarskap.
Qombine presentation by Delphine Martres (UiO): postponed to 5 March 2025
Eidmant? Kala?inskait?-Zavi?ien? (Vytautas Magnus University) will present ongoing work on Lithuanian phrasing and prosodic hierarchy
We are welcoming Simon Henriet from EMBL partner, the Michael Sars Centre in Bergen. He will present his work: "Reprogramming intron recognition at the base of the vertebrate phylum".
Department seminar. Jerry Montonen is a PhD student in Economics at Aalto University and Helsinki GSE. He will present the paper "Dating and Breaking Up With the Boss: Benefits, Costs and Spillovers" (written with David Macdonald and Emily Nix).
Recent advances in experimental techniques have enabled remarkable discoveries and insight into how the dynamics of thin gas/vapour films can profoundly influence the behaviour of liquid droplets: drops impacting solids can “skate on a film of air” [1], so that they can “bounce off walls” [2,3]; reductions in ambient gas pressure can suppress splashing [4] and initiate the merging of colliding droplets [5]; and evaporating droplets can levitate on their own vapour film [7] (the Leidenfrost effect). Despite these advances, the precise physical mechanisms governing these phenomena remain a topic of debate. A theoretical approach would shed light on these issues, but due to the strongly multiscale nature of these processes brute force computation is infeasible. Furthermore, when films reach the scale of the mean free path in the gas (i.e. ~100nm) and below, new nanoscale physics appears that renders the classical Navier-Stokes paradigm inaccurate.
In this talk, I will overview our development of efficient computational models for the aforementioned droplet dynamics in the presence of gas nanofilms into which gas-kinetic, van der Waals and/or evaporative effects can be easily incorporated [8,9]. It will be shown that these models can reproduce experimental observations – for example, the threshold between bouncing and wetting for drop impact on a solid is reproduced to within 5%, whilst a model excluding either gas-kinetic or van der Waals effects is ~170% off! These models will then be exploited to make new experimentally-verifiable predictions, such as how we expect drops to behave in reduced pressure environments. Finally, I will conclude with some exciting directions for future work.
[1] JM Kolinski et al, Phys. Rev. Lett. 108 (2012), 074503. [2] JM Kolinski et al, EPL. 108 (2014), 24001. [3] J de Ruiter et al, Nature Phys. 11 (2014), 48. [4] L Xu et al, Phys. Rev. Lett. 94 (2005), 184505. [5] J Qian & CK Law, J. Fluid. Mech. 331 (1997), 59. [6] KL Pan J. Appl. Phys. 103 (2008), 064901. [7] D Quéré, Ann. Rev. Fluid Mech. 45 (2013), 197. [8] JE Sprittles, Phys. Rev. Lett. 118 (2017), 114502. [9] MV Chubynsky et al, Phys. Rev. Lett.. 124 (2020), 084501.
Much of this work is based on a recent Annual Review: JE Sprittles, Ann. Rev. Fluid Mech. 56 (2024), 91.