go to top scroll for more

Projects: Projects for Investigator
Reference Number	EP/S013296/1
Title	Aerodynamics and aeroacoustics of turbulent flows over and past permeable rough surfaces
Status	Started
Energy Categories	Renewable Energy Sources(Wind Energy) 5%; Energy Efficiency(Transport) 5%; Not Energy Related 88%; Energy Efficiency(Industry) 2%;
Research Types	Basic and strategic applied research 100%
Science and Technology Fields	ENGINEERING AND TECHNOLOGY (Mechanical, Aeronautical and Manufacturing Engineering) 100%
UKERC Cross Cutting Characterisation	Not Cross-cutting 100%
Principal Investigator	Dr B (Bharathram ) Ganapathisubramani No email address given School of Engineering Sciences University of Southampton
Award Type	Standard
Funding Source	EPSRC
Start Date	01 July 2019
End Date	31 December 2024
Duration	66 months
Total Grant Value	£910,574
Industrial Sectors	No relevance to Underpinning Sectors
Region	South East
Programme	NC : Engineering
Investigators	Principal Investigator	Dr B (Bharathram ) Ganapathisubramani , School of Engineering Sciences, University of Southampton (99.999%)
	Other Investigator	Dr R Deiterding , Sch of Engineering, University of Southampton (0.001%)
	Industrial Collaborator	Project Contact , Embraer, Brazil (0.000%) Project Contact , University of Southern California, USA (0.000%)
Web Site
Objectives
Abstract	A variety of turbulent flows are either over porous surfaces or in the wake of bodies with surface porosity. Evolution, engineering design, manufacturing constraints and natural phenomena lead to rough and permeable boundaries in these porous surfaces (e.g. flow in heat exchangers, forest and urban canopies, bird feathers and river beds). The permeability and the roughness of a porous surface alters the turbulent boundary layer that develops over it and consequently the wake past an object with surface porosity. This entirely depends on the interaction between the external flow in the boundary layer over the roughness or the wake and the flow field within the porous media. Despite the wide-ranging impact and relevance, there is a clear lack of fundamental understanding and the scaling laws that relate the properties of porous media to the features of external flow. This points to the clear need for a systematic fundamental study aimed at understanding the flow mechanisms and the relationship between the properties of porous substrates, the flow field within the porous media and the structure of turbulent flow over and past them. In this ambitious collaborative project we combine the experimental expertise at Southampton and Bristol with the computational and modelling expertise at Cambridge and Southampton, to gain fundamental understanding of the turbulent boundary-layer and wake flow over and past permeable rough surfaces. This will be used to develop a fully-validated modelling framework that can predict the aerodynamics and aeroacoustics of turbulent flows interacting with realistic porous surfaces. Specifically, we will (1) examine the aerodynamic and aeroacoustic characteristics of wall-turbulence that develop over porous surfaces using high-fidelity experiments, (2) we will perform detailed DNS and LES of flow over porous surfaces using new in-house tools to understand the interaction between internal flow within the porous media and external flows, (3) use the experimental and numerical data to develop new models to represent the interaction between internal and external flow of porous surfaces in other lower fidelity simulations, (4) Utilise the new models in LES to predict the aerodynamics and aeroacoustics and (5) carry out measurements on the aerodynamics and aeroacoustics of flow over and past permeable rough surfaces over a large range of Reynolds numbers to further our understanding as well as to validate our new models. Ultimately, this will enable us and our industry partner to examine the utility of different realistic porous surfaces in flow/noise control
Publications	(none)
Final Report	(none)
Added to Database	15/08/19