Blar i NTNU Open på forfatter "Kristiansen, David"
-
A Numerical Study on Stratified Shear Layers With Relevance to Oil-Boom Failure
Kristiansen, David; Faltinsen, Odd Magnus (Chapter, 2014)Interface dynamics of two-phase flow, with relevance for leakage of oil retained by mechanical oil barriers, is studied by means of a 2D lattice-Boltzmann method combined with a phase-field model for interface capturing. ... -
An Investigation of Sloshing Inside a Closed Fish Farm Cage
Tronvoll, Fredrik (Master thesis, 2020)I denne masteroppgaven, så blir effekten av skvulping i en lukket fiskemerd studert. Prosjektet omhandler et eksperiment og en numerisk simulering i WADAM. En modell av fiskemerden ble laget ved å benytte en bøtte. En ring ... -
An Investigation of Sloshing Inside Closed Aquaculture Plants
Tofte, Mona (Master thesis, 2017)In the present work sloshing inside closed aquaculture plants at sea has been investigated by both experimental methods and linear sloshing theory. An experiment conducted in the student towing tank at NTNU during the ... -
Application of FhSim for the Analysis of Environmental Loads on a Complete Fish-Farm System
Tsarau, Andrei; Kristiansen, David (Chapter, 2019)Fish farming at exposed locations requires robust and reliable structures that facilitate sustainable, safe and efficient production. There is also a need for proper numerical tools and analysis methods that can be utilised ... -
Bag and floater motions of a fabric membrane cage
Mukhlas, Muhammad; Lader, Pål Furset; Kristiansen, David; Kristiansen, Trygve; Kanazawa, Motoyasu (Journal article; Peer reviewed, 2021) -
Experimental and Numerical Investigation of a Vertical Pre-tensioned Membrane Sheet in Regular Waves
Mukhlas, Muhammad; Kristiansen, Trygve; Lader, Pål Furset; Kristiansen, David (Chapter, 2022) -
Experimental and Numerical Investigations of Global Motions and Slamming Loads on an Aquaculture Feed Barge
Zang, Yuyang (Master thesis, 2018)Local slamming on an aquaculture barge will occur on a deck that is located lower than the main deck. The problem is dependent on the global motions of the structure. If the structure has decks that are located at the port- ... -
Experimental and numerical study of current effects on a plastic containment boom
Vassanyi, Emma Løyland (Master thesis, 2021)Denne masteroppgava er en numerisk og eksperimentell studie gjennomført for å studere de hydrodynamiske effektene på lenser for oppsamling av plast fra havet. To-dimensjonale laboratorietester ble gjennomført for å analysere ... -
Experimental and numerical study of slowly varying added ship resistance in seaway
Riedesel, Haakon Ferdinand (Master thesis, 2021)Fokuset i denne oppgaven ligger på sakte varierende andre ordens krefter, og sammenligningen av forskjellige metoder brukt til estimation. Den nødvendige bølge motstands RAO blir vunnet gjennom eksperimentell testing og ... -
Hydrodynamics of a flexible containment boom
Calonnec, Capucine (Master thesis, 2023)Denne masteroppgaven studerer hydrodynamikken til en fleksibel inneslutningsbom. En global modell basert på teori om kabelstrukturer ble utviklet for å estimere deformasjonene til en bomstruktur som møter strøm. Denne ... -
Investigation of Sloshing Inside Closed Aquaculture Plants
Kosacki, Christian (Master thesis, 2017)This thesis concerns the sloshing effect inside closed fish farm plants exposed to external waves. To investigate the sloshing phenomenon, linear potential theory together with linear modal theory was implemented, and a ... -
Maneuvering and direction stability in restricted waters
Frøyen, Vetle Dyrli (Master thesis, 2023)Denne avhandlinga kastar lys over den siste utviklinga innan manøvrerbarheit og retningstabilitet i avgrensa farvatn. Nyleg vart dette emnet kjent for offentlegheita då tankskipet Ever Given grunnstøtte diagonalt i ... -
Modeling Operational Performance for the Global Fleet & Application of an Energy Saving Measure
Kim, Youngrong (Doctoral theses at NTNU;2023:88, Doctoral thesis, 2023)In order to reduce greenhouse gas emissions (GHG) from ships at sea, various measures have been considered, such as alternative fuels with low carbon intensity, innovative ship technology, and new policies. To successfully ... -
Modelling of Hydrodynamic Loads on Aquaculture Net Cages by a Modified Morison Model
Bore, Pål Takle; Amdahl, Jørgen; Kristiansen, David (Chapter, 2017)A modified Morison model is presented for calculation of hydrodynamic forces on aquaculture net cages. The model is based on a simple method for conversion of \textit{"screen model force coefficients"} to approximate ... -
Numerical analysis of local and global responses of an offshore fish farm subjected to ship impacts
Yu, Zhaolong; Amdahl, Jørgen; Kristiansen, David; Bore, Pål Takle (Journal article; Peer reviewed, 2019)Due to limited nearshore areas and great impact to local ecosystems, the aquaculture industry is moving the fish farms into more exposed sea regions where the environmental conditions are much more severe. Like other ... -
Numerical and Experimental Study on the Seakeeping Behavior of Floating Closed Rigid Fish Cages
Kristiansen, David; Lader, Pål Furset; Endresen, Per Christian; Aksnes, Vegard Øgård (Chapter, 2018)The present paper addresses the seakeeping behavior of a rigid type of floating closed fish cages, with focus on effects of sloshing on the coupled motions and mooring loads. Closed cages have gained much attention recently ... -
Numerical study of closed rigid fish cages in waves and comparison with experimental data
Su, Biao; Tsarau, Andrei; Endresen, Per Christian; Kristiansen, David; Lader, Pål Furset (Journal article; Peer reviewed, 2021)Closed fish cages have gained increased interest in marine aquaculture. However, knowledge on the seakeeping behaviour of a floating closed cage and the influence of the contained water inside the cage are still limited. ... -
OMAE2017-61659 Classification of Aquaculture Locations in Norway With Respect to Wind Wave Exposure
Lader, Pål; Kristiansen, David; Alver, Morten; Bjelland, Hans Vanhauwaert; Myrhaug, Dag (Chapter; Peer reviewed, 2017)In Norway there are a total of 1070 registered sites for salmon farming all along the coast. Trends in the aquaculture industry in the recent decade are that salmon farming sites tend to gradually relocate to more wave and ... -
Real-Time Simulation of Ship Waves
Kårstad, Jon Arnt (Master thesis, 2022)Denne oppgåva har som mål å utvikle ei rutine for realistisk og effektiv visuell modellering av skipsbølgjer i sanntid. Formålet er å forbetre dei virtuelle miljøa der algoritmar som skal brukast i autonome fartøy enklare, ... -
Ship collision analysis with a floating offshore fish farm
Yu, Zhaolong; Amdahl, Jørgen; Kristiansen, David (Chapter, 2019)Due to limited nearshore areas and great impact to local ecosystems, the aquaculture industry is moving the fish farms from nearshore to more exposed sea regions where waves and current are stronger. Like other offshore ...