Blar i NTNU Open på tittel
Viser treff 37305-37324 av 100934
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Fresnel imaging of ferromagnetic domain wall motion using fast pixelated electron detector
(Master thesis, 2022)Magnetic imaging techniques are of great importance for the further development of magnetic materials to be used in promising applications for information storage and sensory devices. The main aim of this thesis was to ... -
Freznel zone in VTI and orthorhombic media
(Journal article; Peer reviewed, 2017)The reflecting zone in the subsurface insonified by the first quarter of a wavelength and the portion of the reflecting surface involved in these reflections is called the Fresnel zone or first Fresnel zone. The horizontal ... -
Fri flyt av sykler i Beijing
(Master thesis, 2019)I 2016 så vi en enorm vekst av stasjonsløse delingssykler i Kina. I løpet av bare noen måneder ble flere store byer dekt av fargerike sykler. Veksten var enorm, noe som har ført til at stasjonsløse delingssykler preger ... -
Fri og frank: Hvordan Martin Scorsese instruerer skuespillere
(Bachelor thesis, 2021)Denne oppgaven forsøker å avgrense Martin Scorseses personinstruksjonsstil. Den søker å oppdage hva som gjør hans instruksjon unik og hvorfor han er i stand til å vekke godt spill. Hans instruksjon anskueliggjøres blant ... -
Fri til å dra - Villig til å bli: Norske fremmedkrigere i den russisk-ukrainske krigen
(Master thesis, 2023)Denne masteroppgaven utforsker norske fremmedkrigere i den russisk-ukrainske krigen, og hva som gjør dem villige til å delta i krig. Oppgaven er et kvalitativt prosjekt som basert på dybdeintervjuer gir en innsikt i (1) ... -
FRICTION AND WEAR OF COATINGS FOR SUBSEA GATE VALVES OPERATING AT HIGH TEMPERATURE AND PRESSURE
(Doctoral thesis at NTNU;2016:161, Doctoral thesis, 2016)Gate valves for subsea oil and gas operation work under harsh conditions. Proper design ensures the valves functional integrity over the designed lifetime of the valve. The design of the valve includes material choice ... -
Friction Factor Model and Interpretation of Real Time Data
(Master thesis, 2013)The interest in torque and drag issues has over the last years increased when the complexity of wells drilled has become higher. The petroleum industry continually expands the extended reach drilling envelope, which forces ... -
Friction Factors in Oil Wells through Analysis of Hook Load
(Master thesis, 2014)As the easy oil and gas is gone, there is today a need for more complex wells in orderto extract the remaining hydrocarbons. Over recent decades, both inclination andlength of drilled wells have increased significantly. ... -
Friction Fluctuations of Gold Nanoparticles in the Superlubric Regime
(Journal article; Peer reviewed, 2018)Superlubricity, or alternatively termed structural (super)lubrictiy, is a concept where ultra-low friction is expected at the interface between sliding surfaces if these surfaces are incommensurate and thus unable to ... -
Friction Mechanisms by Carboxylic Acids in Aqueous Lubricants
(Journal article; Peer reviewed, 2018)Carboxylic acids are well known for their friction-reducing abilities driven by the formation of low-shear-strength films on the steel surface. However, understanding of the adsorption mechanisms especially in polar solvents ... -
Friction models for evaluating dynamic stresses in non-bonded flexible risers
(Journal article; Peer reviewed, 2017)This paper addresses friction models used for evaluating dynamic stresses in non-bonded flexible risers. A review of the most commonly used methods to model friction between layers in such structures was performed. Four ... -
Friction Models for Oscillating Flow in a U-tube
(Master thesis, 2014)The basic theory of friction in pipe flow was reviewed in the first part of this thesis. Using the results from this review, steady state friction relations were derived for laminar and turbulent pipe flow.Steady state ... -
Friction Reduction by using Nano-Fluids in Drilling
(Master thesis, 2014)The increasing requirements of drilling fluids in long extended reach wells desires for new solutions to solve torque and drag problems in the wellbore. Nanotechnology is an upcoming technology development, which is already ... -
Friction reduction by using nanoparticles in oil-based mud
(Master thesis, 2014)Nowadays, increasing demand on petroleum resources and depletion of easy accessible reservoirs result in exploration of challenging reservoirs. Drilling of deeper reservoirs is an important part of this challenge where ... -
Friction stir welding/processing of mg-based alloys: A critical review on advancements and challenges
(Peer reviewed; Journal article, 2021)Friction stir welding (FSW) and friction stir processing (FSP) are two of the most widely used solid-state welding techniques for magnesium (Mg) and magnesium alloys. Mg-based alloys are widely used in the railway, aerospace, ... -
Friction vs. Area Scaling of Superlubric NaCl-Particles on Graphite
(Journal article; Peer reviewed, 2019)Structural lubricity is an intriguing tribological concept, where extremely low friction is anticipated, if two surfaces in relative motion do not share the same lattice structure and consequently instabilities originating ... -
Friction welding of selective laser melted Ti6Al4V parts
(Journal article; Peer reviewed, 2017)Ti6Al4V alloy samples fabricated by selective laser melting (SLM) were subjected to solid-state welding friction welding (FW). The welded alloy exhibits a α´-martensitic microstructure in the form of platelets with dimensions ... -
Friction, facts and fiction: Hybridity in Jean Potocki’s ‘Oriental’ travelogues
(Chapter; Peer reviewed, 2015) -
Frictional fluid instabilities shaped by viscous forces
(Peer reviewed; Journal article, 2023)Multiphase flows involving granular materials are complex and prone to pattern formation caused by competing mechanical and hydrodynamic interactions. Here we study the interplay between granular bulldozing and the stabilising ... -
Frictional Pressure Drop for Two-phase Flow of Carbon Dioxide in a Tube: Comparison between Models and Experimental Data
(Journal article; Peer reviewed, 2014)We compare models for two-phase frictional pressure drop with experimental data for pure CO2 taken in a tube of 10 mm inner diameter. The flow was nearly adiabatic, and the mass fluxes ranged from 1058 to 1663 kg/(m2 s), ...