Browsing NTNU Open by Author "Kristiansen, David"
Now showing items 1-14 of 14
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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 ... -
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- ... -
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 ... -
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 ... -
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 ... -
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 ... -
Statistical modelling of extreme ocean current velocity profiles
Bore, Pål Takle; Amdahl, Jørgen; Kristiansen, David (Journal article; Peer reviewed, 2019)Knowledge about extreme ocean currents and their vertical structure is important when designing offshore structures. We propose a method for statistical modelling of extreme vertical current velocity profiles, accounting ... -
Wave induced effects on floaters of aquaculture plants
Kristiansen, David (Doctoral Theses at NTNU, 1503-8181; 2010:20, Doctoral thesis, 2010)The main objective of this work is to study wave loads on floaters of fish farms. Several incidents of major fish escapes due to structural collapse of fish farms in harsh weather have motivated this study, as a step towards ... -
Wave induced effects on floaters of aquaculture plants
Kristiansen, David (Doctoral Theses at NTNU, 1503-8181; 2010:20, Doctoral thesis, 2010)The main objective of this work is to study wave loads on floaters of fish farms. Several incidents of major fish escapes due to structural collapse of fish farms in harsh weather have motivated this study, as a step towards ...