Isogeometric Finite Element Modelling of Ideal Non-Linear Free-Surface Flows: Towards total energy conservation

Delft University of Technology has access to a towing tank where a wave maker can generate waves. When generating waves, non-linear start-up effects occur at the start of a wave train which affect the rest of the signal.<br/> The aim of this thesis is to develop a model which can take these effects into account. A numerical modelling approach is...

Experimental Measurements of Wave Impacts in a Breaking Dam Flow: An Application of Computer Vision for Quantitative Reconstruction of the Free Surface in Breaking Waves

Breaking water waves still represent a very active research area, as they are involved in a broad spectrum of situations ranging from safety at sea to climate change. The detailed knowledge of the location of the free surface in case of breaking waves or wave impacts could prevent structural damages, increase the efficiency of ship hulls and...

Takeoff of a hydrofoil vessel in Panship: Prediction of lift and drag of a hydrofoil vessel during the takeoff in a Boundary Element Method

Recently the interest in hydrofoil vessels using a fully submerged hydrofoil increased. Hydrofoil vessels experience a resistance hump and possible instabilities during their takeoff of which both are influence by waves. In order to determine the required power during the takeoff to overcome the resistance hump and to investigate whether the...

Vertical Motion Simulation Of A DTMB 5415M Ship In Head Sea Using The Variational Multi-scale Method

This master thesis presents the computation of free-surface flow phenomena with emphasis on ship hydromechanics. We perform a simulation of the heave and the pitch motion of the DTMB 5415M ship moving in head sea. To this purpose we employ an existing Arbitrary-Lagrangian-Eulerian residual-based variational multiscale method (ALE-RBVMS) to...

Isogeometric Potential Flow Analysis of Linear Surface Waves

In numerical methods, correct geometry description and mesh refinement are a challenge. By using a more geometrically based Finite Element Analysis (FEA) type method called ‘Isogeometric Analysis’ (IGA), exact geometry description can be attained, even on coarse meshes. Furthermore, mesh refinement is relatively easy, since no communication with...

Verification and validation of full-scale propulsion analysis using CFD

An accurate prediction of propeller hull interaction is an important step in the design of a new vessel. The prediction of full-scale flow phenomena, which eliminates scale effects, is becoming available due to increasing computational power. However, the complexity of full-scale CFD calculations combined<br/>with a lack of validation data...