MANOEUVRING AND NAUTICAL STUDIES

MARITIME RESEARCH PROGRAMME

This research programme aims at increasing the understanding and modelling capabilities of hydrodynamics of manoeuvring ships and offshore constructions, in order to assess and improve the safety and efficiency of nautical operations, traffic flows and individual ships.

sub programmes

NAUTICAL SAFETY

In this sub-programme, assessment methods to quantify and evaluate nautical safety and ship manoeuvring performance are developed. The safe manoeuvring of individual vessels, and the safety of traffic in rivers and in open sea is considered.

NAUTICAL SAFETY

In this sub-programme, assessment methods to quantify and evaluate nautical safety and ship manoeuvring performance are developed. The safe manoeuvring of individual vessels, and the safety of traffic in rivers and in open sea is considered.

VISCOUS BLUFF-BODY HYDRO- AND AERODYNAMICS

This sub-programme is concerned with hydrodynamic and aerodynamic studies of the flow around bluff bodies, with the aim to accurately predict forces and moments on ships and structures in arbitrary calm-water conditions. Flow-induced motions of rigid bodies, such as vortex-induced motions (VIM), as well as vortex-induced vibrations (VIV), are included in this sub programme.

VISCOUS BLUFF-BODY HYDRO- AND AERODYNAMICS

This sub-programme is concerned with hydrodynamic and aerodynamic studies of the flow around bluff bodies, with the aim to accurately predict forces and moments on ships and structures in arbitrary calm-water conditions. Flow-induced motions of rigid bodies, such as vortex-induced motions (VIM), as well as vortex-induced vibrations (VIV), are included in this sub programme.

CONTROL DEVICES

This sub-programme focuses on the understanding, design and modelling of devices to control the vessel, such as rudders, thrusters, and their interaction.

CONTROL DEVICES

This sub-programme focuses on the understanding, design and modelling of devices to control the vessel, such as rudders, thrusters, and their interaction.

CONFINED WATER EFFECTS AND SHIP-SHIP INTERACTION

This sub-programme expands on the knowledge obtained regarding bluff bodies and control devices, by taking into account the effects of shallow water, river banks, and passing or overtaking vessels.

CONFINED WATER EFFECTS AND SHIP-SHIP INTERACTION

This sub-programme expands on the knowledge obtained regarding bluff bodies and control devices, by taking into account the effects of shallow water, river banks, and passing or overtaking vessels.

MANOEUVRING AND COURSE KEEPING IN WAVES

This sub-programme aims to bridge the gap between manoeuvring in calm water and seakeeping. Forces during manoeuvring are mainly driven by viscous effects, while seakeeping aspects are traditionally modelled using potential flow theory. Reliable methods to combine the physics occurring when sailing in calm water with the physics of motions due to waves need to be developed.

MANOEUVRING AND COURSE KEEPING IN WAVES

This sub-programme aims to bridge the gap between manoeuvring in calm water and seakeeping. Forces during manoeuvring are mainly driven by viscous effects, while seakeeping aspects are traditionally modelled using potential flow theory. Reliable methods to combine the physics occurring when sailing in calm water with the physics of motions due to waves need to be developed.
REFRESCO LOCK ENTRY
Complicated interactions with the environment happens when entering a lock entry. The sudden change of waterway width creates large dynamic effects. Since 2015, more and more detailed CFD computations were performed in ReFRESCO, showing very good results on this challenging case in confined waters and with bank suction.
ReFRESCO-XMF coupling zig-zag manoeuvre
Most ships have to comply with the IMO requirements on the zig-zag and turning circle manoeuvres. These manoeuvres can be simulated in fast time and with high accuracy thanks to the coupling between MARIN CFD code ReFRESCO and time domain simulation framework XMF.
ReFRESCO crabbing operation
Crabbing is the ability of a ship to move sideways when approaching or leaving a quay. This is especially important for cruise ships and ferries because they often enter and leave harbours without assistance of tugs. CFD is a powerful tool to understand the complex flow features during a push-pull manoeuvre, as presented in these videos, and therefore help to evaluate crabbing operations.
REFRESCO OSCILATION TEST
Oscillation tests can be carried out with the MARIN CFD code ReFRESCO, in addition to lock entry, free-running and crabbing manoeuvres. Oscillation tests are one way to obtain the hydrodynamic loads acting on a vessel in specific imposed conditions. These loads can be used to define a mathematical model. Such mathematical model can be used to perform simulations in a fast time or real time (full mission bridge) simulator.