IFE Brage
Not a member yet
1015 research outputs found
Sort by
Evolving Soft Matter: Shape, Dynamics and Functionality. The Geilo School 2019, March 11-21, Geilo, Norway
Get PDFpublishedVersio
Differences in self‐assembly features of thermoresponsive anionic triblock copolymers synthesized via one‐pot or two‐pot by atom transfer radical polymerization
No full textacceptedVersio
Lifetime spectroscopy with high spatial resolution based on temperature- and injection dependent photoluminescence imaging
Get PDFacceptedVersio
Counting electrons - A new approach to tailor the hydrogen sorption properties of high-entropy alloys
Get PDFacceptedVersio
Gas-liquid slug flow in a horizontal concentric annulus, a comparison of numerical simulations and experimental data
Get PDFMultiphase flow simulations were run in OpenFOAM utilizing InterFoam, a volume of fluid type solver. A concentric annulus geometry was constructed and periodic boundary conditions were applied to alleviate the requirement for a longer domain. The simulations were run in 3, 5 and 7m long domains with the annulus dimensioned such that the outer and inner cylinder diameter were 0.1 and 0.05m respectively. The 4 individual mesh designs were constructed such that the coarsest mesh consists of 102k cells/m while the finest mesh was generated with 400k cells/m. Each mesh was significantly refined within 0.005m of both the inner and outer cylinder wall. The simulation data was compared with experimental pressure and holdup data collected at Institute for Energy Technology in Norway. The 3 and 7m domains reproduced slug frequencies to within 9% of the experiment results of 1.43 Hz for all mesh densities. Comparatively, the 5m domain has larger errors with respect to slugging frequency (22–27%). The 5m case performs poorly, probably due to an artificial restraint introduced by the limitation of available liquid which is set as oil = 0.53 for all cases. The αoil restriction combined with the domain length determines the amount of liquid in the system. This interaction of factors means that the domain length is an important parameter when preparing the simulation. The pressure data display a stronger dependence on the mesh quality in comparison to the slug frequency analysis. The 3m domain with a 400k cells/m mesh resulted in a maximum and minimum pressure gradient of 1783.5 and 803.9 Pa/m, compared to the experiment values of 1785 and 822 Pa/m, which are within 3% of the expected results.publishedVersio
Passivation Mechanisms of Atomic Layer-deposited AlOx Films and AlOx/SiOx Stack
Get PDFA new passivation layer of AlOx/SiOx were prepared, in which 80 nm SiOx was prepared by spin-coating perhydropolysilazane (PHPS) and annealed at 450°C. In order to compare the passivation effect of single AlOx layers and the SiOx/AlOx stack on silicon surface, the fixed charge (Qf) in the passivated layers and chemical passivation effect were obtained by corona charge method. Fourier transform infrared spectroscopy (FTIR) and Time-of-flight secondary ion mass spectrometry (TOF-SIMS) was used to investigate the Si-H, Si-O bonds and the hydrogen profile in the passivation layer, respectively. The result reveals that the single layer of AlOx provides good field effect with a large amount of negative Qf. Furthermore, SiOx capping on AlOx have more excellent chemical passivation because of amount of H saturate the dangling bonds on the silicon surface.publishedVersio
Evaluating Innovation Technologies Organizational capabilities
Get PDFPresentation of the concept of integrated operations, how it has been adopted in by oil and gas companies operating the Norwegian Continental Shelf and gives insights into what has worked well and what has worked not so well. Examples and practical guidance for how to use integrated operations in day to day operations are supplemented in the theoretical and methodological presentation.Evaluating Innovation Technologies Organizational capabilitiessubmittedVersio
