Details of Grant 

EPSRC Reference:	GR/T27358/01
Title:	Near-wall flow structures in 3D turbulent boundary layers
Principal Investigator:	Carpenter, Professor PW
Other Investigators:	Thomas, Professor P Li, Professor SCL Cooper, Dr AJ Davies, Dr C
Researcher Co-Investigators:
Project Partners:
Department:	Sch of Engineering
Organisation:	University of Warwick
Scheme:	Standard Research (Pre-FEC)
Starts:	01 November 2004	Ends:	31 October 2007	Value (£):	260,156
EPSRC Research Topic Classifications:	Aerodynamics
EPSRC Industrial Sector Classifications:	Aerospace, Defence and Marine
Related Grants:	GR/T27365/01
Panel History:
Summary on Grant Application Form
It is widely recognized that the streak-like near-wall structures hold the key to understanding turbulent boundary layers (TBLs). Their so-called bursting process is responsible for generating the high surface shear stresses seen in turbulent wall flows. A proper understanding of these near-wall streaks and their quasi-periodic bursting process is essential for developing and optimizing flow-control devices. Considerable recent progress has been made towards understanding and predicting the near-wall structures in 2D TBLs. For example, we have developed a novel deterministic model that agrees well with the experimental observations. However, the TBLs most commonly encountered in engineering are strongly 3D. For example, swept aircraft wings, turbo-machinery blades and vanes, rotating-disk flows, wing-body junctions, flows around surface-mounted obstacles, TBLs on endwalls of curved ducts.We propose to undertake the first-ever experimental study of the near-wall structures in 3D TBLs to determine how they are effected by varying the degree of pressure-driven cross-flow. A complementary computational study will extend our novel deterministic model to the near-wall structures in 3D TBLs. We will also undertake a similar computational and experimental study of the 3D TBL on a rotating disc which is an example of a shear-driven cross-flow. We will thereby compare the forms and properties of the near-wall structures in 3D TBLS with pressure-driven and shear-driven cross-flows in order to identify fundamental differences. Overall we hope to elucidate many of the unanswered questions about 3D TBLs and thereby advance our understanding with the aim of improved flow control and predictive capability.
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Organisation Website:	http://www.warwick.ac.uk