A5073153851- Ship Hydrodynamics and Maneuverability
- Fluid Dynamics Simulations and Interactions
- Structural Integrity and Reliability Analysis
- Maritime Navigation and Safety
- Offshore Engineering and Technologies
- Hydraulic and Pneumatic Systems
- Wave and Wind Energy Systems
- Cavitation Phenomena in Pumps
- Spacecraft and Cryogenic Technologies
- Maritime Transport Emissions and Efficiency
- Neonatal Respiratory Health Research
- Computational Fluid Dynamics and Aerodynamics
- Water Systems and Optimization
- Vibration and Dynamic Analysis
- Structural Health Monitoring Techniques
- Engineering Structural Analysis Methods
- Maternal and Neonatal Healthcare
- Global Maternal and Child Health
- Fluid Dynamics and Vibration Analysis
- Engineering Diagnostics and Reliability
- Parkinson's Disease and Spinal Disorders
- Renal function and acid-base balance
- Material Science and Thermodynamics
- Thyroid and Parathyroid Surgery
- Hydraulic flow and structures
Aalto University
2011-2024
Marine Technology Unit
2018
Tieto (Finland)
2007-2008
University of Technology
2004
Outokumpu (Finland)
2003
University of Helsinki
2002
VTT Technical Research Centre of Finland
1985
We present a modular mathematical model and reference technique for the rapid estimation of maneuvering trajectories motion time histories single- twin-screw propulsion ships. Heave, roll pitch radiation damping are estimated from non-linear unified seakeeping/maneuvering time-domain tool using numerical decay tests then implemented to 6–DoF in form critical natural period. Short waves idealised by integration along vessel's waterline profile associated hydrodynamic actions response curve...
When formulating a general, non-linear mathematical model of ship dynamics in waves the hydrostatic forces and moments along with Froude-Krylov part wave load are usually concerned. Normally radiation diffraction regarded as linear ones. The paper discusses briefly few approaches, which can be used this respect. concerned models attempt to non-linearities surface waves; both regular irregular ones, restoring moments. approach selected Laidyn method, is meant for evaluation large amplitude...
In recent years OpenFOAM studies have focused on pure wave modelling and wave-structure interaction. Considering that there is a lack of transparency concerning effects different motion settings in OpenFOAM, this paper presents the influence numerical setups accurate wave-induced motions. This achieved by applying interFoam solver included OpenFOAM-v2206 with waves2Foam toolbox. The optimal setup studied two-dimensional box-like ship idealisation heaving varying lengths while steepness...
Two different methods, pendulum model and computational fluid dynamics (CFD), to predict the forces on ship caused by flooded water are compared against test results. Calculations were performed for a tank in forced motions at frequencies, which experimental results available. The had dividing wall with an opening. overall behaviour of force time history was well captured model. In particular lower frequency agreement range is very good. Some small peaks due sloshing predicted good...
Defining numerical uncertainty is an important part of the practical application a method. In case ship advancing in short and steep waves, little knowledge exists on solution behaviour as function discretisation resolution. This paper studies interface-capturing (VOF) for passenger (kA = 0.24) waves (L w /L pp 0.16). The focus to estimate quantitative uncertainties longitudinal distributions first–third harmonic wave loads bow area. These estimates are derived from results three...
Kaplan turbine runner rotates in water flow inside an enclosed discharge ring. The vibratory motion the fluid induces pressure forces onto wet surfaces with inertia effects conveniently described by so-called hydrodynamic added mass and damping. These influence natural frequencies amplitudes. role of damping shaft rotor dynamics has not been sufficiently well understood. This paper focuses on comprehensive understanding these phenomena across design range. results are based a method derived...
Abstract This paper describes a method for simulation of viscous flows with free surface around realistic hull forms transom, which has been developed based on FINFLO RANS solver moving mesh. A dry‐transom model is proposed and implemented the treatment off transom. The bulk flow artificial compressibility solved by cell‐centred finite volume multigrid scheme deformed wave motions tracked satisfying kinematic dynamic free‐surface boundary conditions actual location surface. effects...