Browsing Fakultet for ingeniørvitenskap (IV) by Title
Now showing items 22484-22503 of 22886
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Voltage Sensor Fault Detection in Li-ion Battery Energy Storage Systems
(Chapter, 2022)Safe and optimal operation of battery energy storage systems requires correct measurement of voltage, current, and temperature. Therefore, fast and correct detection of sensor faults is of great importance. In this paper, ... -
Volume Control in the Surface Drilling Fluid System
(Master thesis, 2010)During drilling operations the mud pit volume varies quite a lot. These variations are unavoidable due to different short term factors such as tripping in and out of the hole and pump rate changes, and different long term ... -
Volume Free Strain Energy Density Method for Applications to Blunt V-Notches
(Peer reviewed; Journal article, 2020)This work investigates the application of the strain energy density method to rounded V-notches under mode I loading conditions and to components without stress concentrators through finite element models that do not involve ... -
Volume growth during uniaxial tension of particle-filled elastomers at various temperatures–Experiments and modelling
(Journal article; Peer reviewed, 2017)A common presumption for elastomeric material behaviour is incompressibility, however, the inclusion of filler particles might give rise to matrix-particle decohesion and subsequent volume growth. In this article, the ... -
Volumetric strain measurement of polymeric materials subjected to uniaxial tension
(Journal article; Peer reviewed, 2019)A novel method for measuring and calculating volumetric strain in circular cylindrical uniaxial tension samples made from polymeric materials is proposed. It is shown that special considerations must be taken when calculating ... -
Voluntary Speed Loss of Ships
(Master thesis, 2017)When a ship is caught in heavy seas, speed loss follows. This thesis focuses on the subjective part of speed loss; voluntary speed reductions to maintain the safety of the ship, the cargo and the people. The objective is ... -
Volunteered geographic information research in the first decade: a narrative review of selected journal articles in GIScience
(Peer reviewed; Journal article, 2020)More than 10 years have passed since the coining of the term volunteered geographic information (VGI) in 2007. This article presents the results of a review of the literature concerning VGI. A total of 346 articles published ... -
Volunteered Geographic Information Research in the First Decade: Visualizing and Analyzing the Author Connectedness of Selected Journal Articles in GIScience
(Peer reviewed; Journal article, 2020)Volunteered geographic information (VGI) has been widely explored by researchers for decision support in various application domains because the data are cost-effective to collect and their richness in volume and spatiotemporal ... -
Vortex dislocation mechanisms in the near wake of a step cylinder
(Peer reviewed; Journal article, 2020)Vortex interactions behind step cylinders with diameter ratio D/d = 2 and 2.4 at Reynolds number ( ReD ) 150 were investigated by directly solving the three-dimensional Navier–Stokes equations. In accordance with previous ... -
Vortex dynamics and flow patterns in a two-dimensional oscillatory lid-driven rectangular cavity
(Peer reviewed; Journal article, 2020)The vortex dynamics in a two-dimensional oscillatory lid-driven cavity with depth-to-width ratio 1:2 has been investigated, covering a wide range of Reynolds numbers and Stokes numbers where this flow is known to be in the ... -
Vortex dynamics of a jet at the pressure node in a standing wave
(Journal article; Peer reviewed, 2020)In this paper we investigate the vortex structure and dynamics formed in the near field of a turbulent axisymmetric jet subjected to transverse acoustic forcing. Full three-dimensional phase-averaged velocity measurements ... -
Vortex generator's effect on trailing edge vortex shedding and fluid structure interaction
(Peer reviewed; Journal article, 2020)An initial study of the effects vortex generators (VGs) have on the mitigation of vortex-induced vibrations (VIVs) of hydrofoils have been performed at the Waterpower laboratory of the Norwegian University of Science and ... -
Vortex generator's effect on trailing edge wake and fluid structure interaction
(Master thesis, 2020)Detaljer rundt bruk av virvelgeneratorer i hydrodynamiske miljøer og deres effekter på mildning av virvelinduserte vibrasjoner er ennå ikke tilstrekkelig undersøkt i litteraturen. Vannkraftverk som er utsatt for disse ... -
Vortex Induced Fatigue Damage of a Steel Catenary Riser near the Touchdown Point
(Master thesis, 2013)In this thesis, the fatigue damage of a steel catenary riser was investigated, especially in the vicinity of the touchdown point.The steel catenary riser is a promising riser solution due to its simplicity and low cost. ... -
Vortex Induced Vibrations in Fish Farm Structural Elements
(Master thesis, 2015)Norway produces over 14 million meals of salmon every day. This corresponds to an annual value of close to 40 billion NOK. The world s continuous population increase will require a substantial increase in food production. ... -
Vortex induced vibrations of free span pipelines
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:106, Doctoral thesis, 2009)Pipelines from offshore petroleum fields must frequently pass overareas with uneven seafloor. In such cases the pipeline may havefree spans when crossing depressions. Hence, if dynamic loads canoccur, the free span ... -
Vortex Induced Vibrations of Marine Risers
(Master thesis, 2012)SummaryThis Master s Thesis goal is to present fundamental physical aspects of Vortex Induced Vibrations (VIV) of marine risers, and outline methods for suppression of VIV. Main emphasis has been given to the use of strakes, ... -
Vortex Induced Vibrations of Pipelines With Non-Linear Seabed Contact Properties
(Chapter; Peer reviewed, 2016)A promising time domain model for calculation of cross-flow vortex induced vibrations (VIV) is under development at the Norwegian University of Science and Technology. Time domain, as oppose to frequency domain, makes it ... -
Vortex Induced Vibrations of Slender Catenary Structures
(Master thesis, 2015)A wide range of offshore science and engineering applications utilize slender catenary-shaped structural elements in their design. These applications include moorings and steel catenary riser designs. The susceptibility ... -
Vortex Induced Vibrations of Slender Marine Structures
(Master thesis, 2013)The main objective of this thesis is to study the behaviour of slender marine structures exposed to vortex induced vibrations (VIV). Especially the interaction between active response frequencies is important. This is done ...