Tidligere gjesteforelesninger og seminarer - Side 33

Title: Microscale wave breaking and airflow separation in stratified two-phase pipe flow

by: Petter Vollestad, matematisk institutt, UiO.

Abstract: We perform an experimental study of stratified gas-liquid pipe flow with the aim to detect small-scale wave breaking and its influence on both the gas and liquid phase. Particle image velocimetry (PIV) is applied simultaneously in the two phases, and a criterion based on the vorticity in the crest region is used to detect microscale breaking waves. Airflow separation is frequently observed, and the study aims to investigate the correlation between small scale wave breaking and airflow separation above waves.  Results indicate that at moderate gas flow rates, microscale wave breaking has a stabilizing effect on the airflow above waves, reducing the sheltered region in the lee of the wave crest and the turbulence directly above the waves. At higher gas flow rates, no influence of wave breaking on the airflow is observed.

Friday Mingle

Title: Cement foams: yield stress and stability

Speaker: Eirik Valseth (South Dakota School of Mines & Technology) Title: Automatic Variationally Stable Analysis for Finite Element Computations Abstract

Dawn Erb, University of Milwaukee

An abstract of the talk is available here.

We will have a “mingle” meeting. There will be updates from Kristine and Per on the running of the institute. But fear not, there will also be plenty of time for informal chat and eating of cake. All are welcome to the lobby on the first floor.

Hans J. Skaug (Department of Mathematics, University of Bergen) and Mike Spagat (Department of Economics, Royal Holloway University of London) will both give a talk on December 6th at 14:15 and 15:15 in the Seminar Room 819, Niels Henrik Abels hus, 8th floor.

CEES Extra seminar by Love Dalén, Swedish Museum for Natural History, Stockholm

It is time to fasten your seat belt and get ready for a brief introduction to aircraft flight!

By airline captain Stig Patey, Norwegian Air Shuttle

A conference in algebraic geometry on the occasion of Geir Ellingsrud’s 70th birthday

Francesca Figueras, Institute of Cosmos Science, University of Barcelona (Spain) 

Tore S. Kleppe (Department of Mathematics and Physics, University of Stavanger) and Christopher Nemeth (Department of Mathematics and Statistics, Lancaster University) will both give a talk on November 30th, at 10:15 and 11:15, respectively, in the Seminar Room 819, Niels Henrik Abels hus, 8th floor.

Asle Sudbø, Department of Physics, Norwegian University of Science and Technology

Lund, Sweden, will soon host two of the most advanced particle accelerators for photon and neutron science, MAX IV - an electron synchrotron, and the European Spallation Source - a high power proton linac. This double seminar (25 + 25 min) will give an overview of both facilities, covering the complementarity of the two facilities as well as the accelerator science challenges. The seminar is suited for students as well as staff. 

Thordis L. Thorarinsdottir (Statistical Analysis, Machine Learning, and Image Analysis Group, Norwegian Computer Center) will give a talk on November 20th at 14:15 in the Seminar Room 819, Niels Henrik Abels hus, 8th floor.

Max Grönke, postdoc Santa Barbara, CA

By Lukas Keller, University of Zurich