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Visualization of Unsteady Flow in a Multistage Helico-Axial Pump
(Journal article, 2023)Helico-axial pumps are designed to pump mixtures of gas and liquid. Secondary flows and rotor-stator interactions are known to add complexity to the flow field in unshrouded axial-flow turbomachinery. Here we use a high-speed ... -
Vorticity in peripheral collisions at the Facility for Antiproton and Ion Research and at the JINR Nuclotron-based Ion Collider fAcility
(Peer reviewed; Journal article, 2014-08-29)The flow vorticity development is studied in the reaction plane of peripheral relativistic heavy-ion reactions at energies just above the threshold of the transition to a quark-gluon plasma (QGP). Earlier calculations at ... -
W and Z boson production in p–Pb collisions at \(\sqrt{s_{\rm NN}}=5.02\) TeV
(Peer reviewed; Journal article, 2017-02)The W and Z boson production was measured via the muonic decay channel in proton-lead collisions at \(\sqrt{s_{\rm NN}}=5.02\) TeV at the Large Hadron Collider with the ALICE detector. The measurement covers backward ... -
A water droplet-powered sensor based on charge transfer to a flow-through front surface electrode
(Journal article; Peer reviewed, 2020)A water droplet sensor based on a flow-through front surface electrode is demonstrated. It is shown that a triboelectric nanogenerator based on a metal-dielectric junction can be utilized to construct simple, self-powered ... -
Water shutoff and conformance improvement: an introduction
(Journal article; Peer reviewed, 2021)This paper provides an introduction to the topic of water shutoff and conformance improvement. After indicating the volumes of water produced during oilfield operations, a strategy is provided for attacking excess water ... -
Waterflood Efficiency and Single-Phase Flow Properties of Carbonate Porous Media
(Doctoral thesis, 2009-12-17) -
Weinberg’s 3HDM potential with spontaneous CP violation
(Journal article; Peer reviewed, 2023)We study the potential of Weinberg’s Z2×Z2-symmetric three-Higgs-doublet model. The potential is designed to accommodate CP violation in the scalar sector within a gauge theory, while at the same time allowing for natural ... -
Wettability effects on oil recovery mechanisms in fractured chalk
(Doctoral thesis, 2007-02-02)This thesis is a part of the ongoing project, “Oil recovery from fractured chalk reservoirs”, which is a collaboration between the Reservoir Physics Group at the University of Bergen and ConocoPhillips Research Center in ... -
Wetting of porous thin films exhibiting large contact angles
(Journal article; Peer reviewed, 2023)Porous solid films that promote large apparent contact angles are interesting systems since their wetting properties are dependent on both the surface structure and water penetration into the film. In this study, a ... -
Wetting Stability of Aged Limestone in the presence of HPAM polymer
(Master thesis, 2020-06-04)The Norwegian Petroleum Directorate required that a polymer field pilot should be performed in the Johan Sverdrup field in the second phase of the field development to confirm potential enhanced recovery potential at the ... -
What Determines the Parameters of a Propagating Streamer: A Comparison of Outputs of the Streamer Parameter Model and of Hydrodynamic Simulations
(Journal article; Peer reviewed, 2021)Electric streamer discharges (streamers) in the air are a very important stage of lightning, taking place before formation of the leader discharge, and with which an electric discharge starts from conducting objects which ... -
What is the appropriate coordinate system for magnetometer data when analyzing ionospheric currents?
(Peer reviewed; Journal article, 2014-10)In this paper we investigate which coordinate representation is most appropriate when analyzing ground magnetometer data in terms of ionospheric currents, in particular the westward electrojet. The AL and the recently ... -
What is the flux of low energy electron precipitation in the lower thermosphere?
(Master thesis, 2022-06-03)The ionisation caused by Energetic particle precipitation (EPP) into the atmosphere, lead to chemical reactions producing NO_x (N, NO, NO_2) gases. Auroral electrons (1-30 keV) deposit their energy throughout the upper ... -
Why should we use residual thermodynamics for calculation of hydrate phase transitions?
(Journal article; Peer reviewed, 2020)The formation of natural gas hydrates during processing and transport of natural has historically been one of the motivations for research on hydrates. In recent years, there has been much focus on the use of hydrate as a ... -
Will Climate Change Impact Polar NOx Produced by Energetic Particle Precipitation?
(Journal article; Peer reviewed, 2020)Energetic electron precipitation (EEP) is an important source of polar nitrogen oxides (NOx) in the upper atmosphere. During winter, mesospheric NOx has a long chemical lifetime and is transported to the stratosphere by ... -
Wilson line correlators beyond the large-Nc
(Journal article; Peer reviewed, 2021)We study hard 1 → 2 final-state parton splittings in the medium, and put special emphasis on calculating the Wilson line correlators that appear in these calculations. As partons go through the medium their color continuously ... -
W±-boson production in p–Pb collisions at \( \sqrt{s_{\textrm{NN}}} \) = 8.16 TeV and Pb–Pb collisions at \( \sqrt{s_{\textrm{NN}}} \) = 5.02 Te
(Journal article; Peer reviewed, 2023)The production of the W± bosons measured in p–Pb collisions at a centre-of-mass energy per nucleon–nucleon collision \( \sqrt{s_{\textrm{NN}}} \) = 8.16 TeV and Pb–Pb collisions at \( \sqrt{s_{\textrm{NN}}} \) = 5.02 TeV ... -
Z boson production in Pb+Pb collisions at √sNN=5.02 TeV measured by the ATLAS experiment
(Journal article; Peer reviewed, 2020)The production yield of Z bosons is measured in the electron and muon decay channels in Pb+Pb collisions at √sNN = 5.02 TeV with the ATLAS detector. Data from the 2015 LHC run corresponding to an integrated luminosity of ... -
Z-boson production in p-Pb collisions at √sNN = 8.16 TeV and Pb-Pb collisions at √sNN = 5.02 TeV
(Journal article; Peer reviewed, 2020)Measurement of Z-boson production in p-Pb collisions at √ sNN = 8.16 TeV and Pb-Pb collisions at √ sNN = 5.02 TeV is reported. It is performed in the dimuon decay channel, through the detection of muons with pseudorapidity ... -
ZZ→ℓ+ℓ−ℓ'+ℓ'− cross-section measurements and search for anomalous triple gauge couplings in 13 TeV pp collisions with the ATLAS detector
(Peer reviewed; Journal article, 2018)Measurements of ZZ production in the lþl−l0þl0− channel in proton–proton collisions at 13 TeV center-of-mass energy at the Large Hadron Collider are presented. The data correspond to 36.1 fb−1 of collisions collected by ...