Details of Grant 

EPSRC Reference:	GR/S64455/01
Title:	Vortex Induced Vibration of Deep Water Riser Pipes in Complex Configurations
Principal Investigator:	Graham, Professor JM
Other Investigators:	Sherwin, Professor S
Researcher Co-Investigators:
Project Partners:	BP Orcina Ltd
Department:	Aeronautics
Organisation:	Imperial College London
Scheme:	Standard Research (Pre-FEC)
Starts:	03 April 2004	Ends:	02 April 2007	Value (£):	171,664
EPSRC Research Topic Classifications:	Aerodynamics
EPSRC Industrial Sector Classifications:	Energy
Related Grants:
Panel History:	Panel Date Panel Name Outcome 16 Sep 2003 Engineering Prioritisation Panel (A) 16/09/03 Deferred
Summary on Grant Application Form
A quasi-3-dimensional Navier-Stokes code (VIVIC) which treats the flow field of a long flexible riser in a marine current on a linked sectional basis will be developed to simulate the flow around (a) pairs of flexible risers in relative motion including spasmodic contact and (b) a flexible riser having a moving tangential contact with the sea bed. For both of these generic cases an efficient deforming mesh will be developed, probably based on Delaunay triangulation of the union of two sub-meshes which has proved to be practical in preliminary tests. The validity of this sectional analysis will be established by comparisons with the flow field predictions of a fully three-dimensional code (NEKTAR) for selected representative cases. Comparisons will also be made with experimental data for case (a) of two flexibly mounted pipes in relative motion in a cross flow and as far as possible with case (b) interaction with the sea bed. The quasi-3-dimensional code will also be used to simulate flows involving local three-dimensional effects (spiral strakes and change of diameter due to buoyancy cans) and comparisons made with the fully 3-dimensional code.Information on high mode reponse for all the above cases will be disseminated to the Offshore Industry.
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Organisation Website:	http://www.imperial.ac.uk