Browsing NTNU Open by Title
Now showing items 94250-94269 of 103737
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Three-dimensional internal gravity-capillary waves in finite depth
(Journal article; Peer reviewed, 2019)We consider three‐dimensional inviscid‐irrotational flow in a two‐layer fluid under the effects of gravity and surface tension, where the upper fluid is bounded above by a rigid lid and the lower fluid is bounded below by ... -
Three-dimensional Linear Eddy Modeling of a Turbulent Lifted Hydrogen Jet Flame in a Vitiated Co-flow
(Journal article; Peer reviewed, 2018)A new methodology for modeling and simulation of reactive flows is reported in which a 3D formulation of the Linear Eddy Model (LEM3D) is used as a post-processing tool for an initial RANS simulation. In this hybrid approach, ... -
Three-dimensional magnetotelluric modelling in a mixed space-wavenumber domain
(Peer reviewed; Journal article, 2022)We have developed a new 3D magnetotelluric modeling scheme in a mixed space-wavenumber domain. The modeling scheme is based on using a 2D Fourier transform along two horizontal directions to solve a vector-scalar potential ... -
Three-Dimensional Measurement of Azimuthally Forced Flames in an Annular Combustor
(Doctoral theses at NTNU;2023:56, Doctoral thesis, 2023)This thesis aims to better understand thermoacoustic instabilities in annular combustors. Thermoacoustic instabilities are a topic of interest since it is a challenge to operate gas turbines in a lean regime that reduces ... -
Three-dimensional migratory behaviour of European silver eels (Anguilla anguilla) approaching a hydropower plant
(Peer reviewed; Journal article, 2022)Three-dimensional migratory behaviour of European silver eels (Anguilla anguilla) approaching a hydropower plant facilities to accomodate downstream eel migration. The results of this recommendation are poorly studied, and ... -
A Three-Dimensional Model for Strength Assessment of Type-C Independent Cargo Tank Structures
(Peer reviewed; Journal article, 2020)For the analysis of the arrangement and strength of Type-C independent cargo tank structures, the linear spring or rod elements are usually used to model supporting woods, in which one-dimensional and linear contact behaviors ... -
Three-dimensional numerical modeling of local scour around a non-slender cylinder under varying wave conditions
(Chapter, 2015)The three-dimensional numerical model REEF3D is used to simulate the detailed flow field and sediment transport around a non-slender cylinder under regular waves. The location of the free surface is calculated with the ... -
Three-Dimensional Numerical Modeling of Local Scouring in Open Channel Flow
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:127, Doctoral thesis, 2011)In the present study the three-dimensional numerical model SSIIM is used to investigate local scouring in open channel flow. Based on an implicit finite-volume scheme, the transient Reynolds-averaged Navier-Stokes equations ... -
Three-dimensional numerical modeling of water flow in a rock-blasted tunnel
(Master thesis, 2017)Climate change leads to more intense precipitation in Norway. NVE requires all bypass tunnels have sufficient capacity for bypassing flood water. The hydro-power industry needs a method for establishing tunnel capacity, ... -
Three-dimensional numerical modelling of sediment transport during the flushing of hydropower reservoirs
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:295, Doctoral thesis, 2012) -
Three-dimensional numerical modelling of sediments in water reservoirs
(Master thesis, 2010)Many places in the world the rivers transport a lot of sediments. When these sediments enter slow flowing areas like a water reservoir, the sediments are deposited. This leads to a reduction in the volume of the reservoir. ... -
Three-Dimensional Numerical Modelling of Water Flow over a Rough Channel Bed
(Master thesis, 2017)A three-dimensional numerical model is used to simulate the water flow field over a rough channel bed, utilizing the open source computational fluid dynamics toolbox OpenFOAM. The geometry of the numerical model is a ... -
Three-dimensional numerical modelling of wave-induced scour around piles in a side-by-side arrangement
(Journal article; Peer reviewed, 2018)The paper presents the numerical modelling of wave-induced scour around piles in a side-by-side arrangement using the open-source CFD model REEF3D. The model solves the Reynolds-Averaged Navier-Stokes equations to calculate ... -
Three-dimensional numerical modelling of wave-induced scour around piles in a side-by-side arrangement
(Journal article; Peer reviewed, 2018) -
Three-Dimensional Numerical Study of Free-Flow Sediment Flushing to Increase the Flushing Efficiency: A Case-Study Reservoir in Japan
(Journal article; Peer reviewed, 2017)The catchment of the Dashidaira reservoir located on the Kurobe River has high sediment yield. Because of the sufficient available amount of water in the catchment during flood events, the free-flow sediment flushing ... -
Three-dimensional obstacle avoidance and path planning for unmanned underwater vehicles using elastic bands
(Journal article; Peer reviewed, 2024)Unmanned underwater vehicles (UUVs) have become indispensable tools for inspection, maintenance, and repair operations in the underwater domain. The major focus and novelty of this work is collision-free autonomous navigation ... -
Three-dimensional parabolic equation model for seismo-acoustic propagation: Theoretical development and preliminary numerical implementation
(Journal article; Peer reviewed, 2017)A three-dimensional (3D) parabolic equation (PE) model for sound propagation in a seismo-acoustic waveguide is developed in Cartesian coordinates, with x, y, and z representing the marching direction, the longitudinal ... -
Three-Dimensional Path Planning of Deep-Sea Mining Vehicle Based on Improved Particle Swarm Optimization
(Peer reviewed; Journal article, 2023)Three-dimensional path planning is instrumental in path decision making and obstacle avoidance for deep-sea mining vehicles (DSMV). However, conventional particle swarm algorithms have been prone to trapping in local optima ... -
Three-dimensional printing constructs based on the chitosan for tissue regeneration: State of the art, developing directions and prospect trends
(Peer reviewed; Journal article, 2020)Chitosan (CS) has gained particular attention in biomedical applications due to its biocompatibility, antibacterial feature, and biodegradability. Hence, many studies have focused on the manufacturing of CS films, scaffolds, ... -
Three-Dimensional Radio Channel Modeling for Mobile Communications Systems
(Dr. ingeniøravhandling, 0809-103X; 2001:89, Doctoral thesis, 2001)The work described in this report is within the area of three-dimensional (3D) radio channel modeling for mobile communications. The focus was towards rural areas, because radio coverage of rural areas is more costly when ...