Browsing NTNU Open by Title
Now showing items 64983-65002 of 101443
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Numerical Experiments on a Deep Learning Approach to Solving High- Dimensional Partial Differential Equations
(Master thesis, 2020)Denne masteroppgaven utforsker en metode for å løse høydimensjonale partielle differentialligninger ved bruk av dyp læring. Numerisk analyse av partielle differentialligninger er av stor betydning ettersom det kan beskrive ... -
Numerical Failure Analysis of a Carbon Fiber Composite Ring Sleeve for a High-Speed Rotor
(Master thesis, 2020)Å begrense de økende utslippene fra kommersiell luftfart har blitt en global prioritering. For å møte kravene om redusert miljøpåvirkning, forskes det for tiden på hybrid-elektriske flyteknologi. Denne oppgaven undersøker ... -
Numerical Failure Analysis of a Carbon Fiber Composite Ring Sleeve for a High-Speed Rotor
(Master thesis, 2021)Denne master oppgaven omhandler en studie av en karbonfiber hylse. Denne hylsen har som funksjon å holde på plass en rotorkonstruksjon som sitter i en elektrisk motor. Oppgaven er skrevet i samarbeid med Nils Petter ... -
A numerical framework for estimating the effective reproduction number of infectious diseases from compartmental epidemic models
(Peer reviewed; Journal article, 2021)We present a numerical framework for estimating the effective reproduction number of infectious diseases from compartmental epidemic models. The idea is to augment the reproduction number as an extended state variable in ... -
Numerical Framework for Modeling Cyclic Degradation of Soils
(Master thesis, 2017)For many years fatigue in soils has been a major design challenge. Due to cyclic loading the material behavior changes and permanent deformations are observed. Although explicit cyclic calculation methods exists, none are ... -
A numerical framework for modelling the dynamics of open ocean aquaculture structures in viscous fluids
(Peer reviewed; Journal article, 2020)This paper presents a complete numerical framework for modelling open ocean aquaculture structures in waves and current using Computational Fluid Dynamics (CFD). A structural dynamics model is incorporated to account for ... -
Numerical Generation of Hill-Diagrams; Validation on the Francis99 Model Turbine
(Journal article; Peer reviewed, 2018)This article compares a numerically simulated, and an experimentally obtained Hill-Diagram. The Francis99 model turbine was used in the validation. By using steady-state simulations and passage modeling in ANSYS CFX, the ... -
A numerical geotechnical model for computing soil slides at banks of water reservoirs
(Peer reviewed; Journal article, 2020)Soil slides can occur when the water level in a lake or a reservoir is lowered. This may take place in situations when a reservoir is flushed to remove sediments. The current study describes a three-dimensional numerical ... -
Numerical heat and mass transfer study of a biomass thermal treatment
(Master thesis, 2019)For å nå fremtidige klimamål, pålegger FN bedrifter utslippskrav i økende mengder for å stramme inn karbonutslipp. Elkem ASA forsker på hvordan dagens kull og koks brukt i reduksjonsprosessen av kvarts kan erstattes med ... -
Numerical Implementation and Evaluation of a Set of Population Balance Breakage Closures
(Master thesis, 2016)The population balance equation (PBE) can be used to model multiphase processes, where one or more dispersed phases are distributed in a continuous medium. In such systems, the interfacial area is an important quantity, ... -
Numerical implementation of a non-local GTN model for explicit FE simulation of ductile damage and fracture
(Journal article, 2021)In this study, we follow the work of Tvergaard and Needleman (1995, 1997) and Needleman and Tvergaard (1998) and present the numerical implementation and initial applications of a non-local Gurson-Tvergaard-Needleman (GTN) ... -
Numerical Implementation of Brittle Failure Model for Glass
(Master thesis, 2017)This thesis is concerned with a strength model for float glass. Failure of glass is usually initiated from surface flaws and the glass is reckoned as failed with the first failing flaw. The model implements a flaw map over ... -
Numerical implementation of the pressure-patch model of ships on flows of arbitrary shear profiles
(Master thesis, 2019)I denne oppgaven er det utviklet en numerisk metode for å finne en ekstern trykkfordeling som modellerer et skip på vannoverflaten gitt skrogets form, fartøyets fart, vanndybden og en dybdeavhengig skjærprofil. Trykkflekker ... -
Numerical integration in inverse problems for ordinary differential equations
(Master thesis, 2022)Dersom ein kjenner punkter av løysinga til ei ordinær differensiallikning (ODE), handlar det inverse problemet om å finne ein approksimasjon av vektorfeltet. Ei forskingsretning som nyleg har vorte særs aktiv, dreier seg ... -
Numerical integrators for Lagrangian oceanography
(Peer reviewed; Journal article, 2020)A common task in Lagrangian oceanography is to calculate a large number of drifter trajectories from a velocity field pre-calculated with an ocean model. Mathematically, this is simply numerical integration of an Ordinary ... -
Numerical Investigation and Optimization of a District-Scale Groundwater Heat Pump System
(Peer reviewed; Journal article, 2023)Groundwater heat pump (GWHP) systems are acknowledged as renewable and sustainable energy sources that can effectively fulfill the heating and cooling requirements of buildings on a district level. These systems harness ... -
Numerical investigation into the effects of corrosion on the shear performance of pretensioned bridge girders with cast-in-place slabs
(Peer reviewed; Journal article, 2022)Corrosion and shear cracking are frequently observed near supports of pretensioned bridge girders in coastal climates, so non-linear finite element analysis was used to study the effect of corrosion on shear performance ... -
Numerical investigation of 3D flow around a circular cylinder with forced oscillations
(Master thesis, 2023)Sirkulære sylindere blir brukt i ulike maritime anvendelser som rørledninger og stigerør. Flere eksperimenter utført ved Marintek ble gjennomført av K.H. Aronsen på problemet med en sylinder som svinger både i x- og ... -
Numerical Investigation of 3D Flow Around Two Tandem Cylinders
(Master thesis, 2015)Circular cylinders in tandem arrangement are used in many marine applications like dual pipelines and dual risers. Turbulent flow in 3D around two tandem cylinders is simulated numerically using Large Eddy Simulation (LES) ...