Computational Modelling Group

Seminar  21st January 2011 10 a.m.  University of Southampton, Building 59 (Tizard), Room 3021

Acoustic Characterisation of the Hydraulic Flows and Boundary Conditions in Pipes and Open Channels

Professor Kirill Horoshenkov
School of Engineering, Design and Technology, University of Bradford

Web page
Acoustics, Oceanography, Wave propagation
Petrina Butler

This talk will discuss non-invasive acoustic methods developed to measure the conditions in pipes and open channels.

It will be shown how the instantaneous acoustic intensity vector can be used to detect wall cracks, sediment deposits, their locations and evolution.

Accurate data on the boundary conditions and hydraulic flows in pipes are required to predict accurately the probability of flooding and ground subsidence incidents and to optimise the investment in the underground water infrastructure.

This talk will also illustrate how acoustic waves can provide a reliable means to measure the surface roughness in shallow water flows.

A turbulent, shallow water flow is typically characterised by its dynamically rough water surface that carrier information on the hydraulic processes within this system.

It has been suggested that the spectral and statistical characteristics of this surface can be related to the scale and intensity of the flow turbulent structures which cause the water surface to appear rough.

These characteristics are very important for our better understanding of the hydraulic energy losses and the mixing processes in turbulent flows.

It will be shown that these characteristics can be obtained from accurate measurements of amplitude, phase and the intensity of the acoustic signal scattered by the dynamically rough water surface.



Susan Brindle, ISVR (Institute for Sound and Vibration Research, University of Southampton)