ORCID Profile
0000-0002-6895-8325
Current Organisation
University of Leeds
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Publisher: Elsevier BV
Date: 04-2013
Publisher: Acoustical Society of America (ASA)
Date: 07-2014
DOI: 10.1121/1.4883376
Abstract: A technique that is an extension of an earlier approach for marine sediments is presented for determining the acoustic attenuation and backscattering coefficients of suspensions of particles of arbitrary materials of general engineering interest. It is necessary to know these coefficients (published values of which exist for quartz sand only) in order to implement an ultrasonic dual-frequency inversion method, in which the backscattered signals received by transducers operating at two frequencies in the megahertz range are used to determine the concentration profile in suspensions of solid particles in a carrier fluid. To demonstrate the application of this dual-frequency method to engineering flows, particle concentration profiles are calculated in turbulent, horizontal pipe flow. The observed trends in the measured attenuation and backscatter coefficients, which are compared to estimates based on the available quartz sand data, and the resulting concentration profiles, demonstrate that this method has potential for measuring the settling and segregation behavior of real suspensions and slurries in a range of applications, such as the nuclear and minerals processing industries, and is able to distinguish between homogeneous, heterogeneous, and bed-forming flow regimes.
Publisher: ASMEDC
Date: 2011
Abstract: The UK nuclear industry has in its inventory legacy waste in the form of complex, polydisperse and “polydense” suspensions, slurries and sludges in a variety of storage and transport vessels. This waste has been difficult to characterise because of radioactivity and limited accessibility, and conditioning and disposal of the waste presents a continuing challenge. In addition, the mechanisms by which very dense particles are transported in pipes are not well understood. Our objectives are to investigate the effect of mono- and bidisperse suspensions with a range of particle sizes and densities on the turbulence characteristics, transport and settling behaviour of slurries that are chosen to be analogues of those found on nuclear sites. Two versatile slurry pipe-flow loops of different diameters have been commissioned which can be operated over a large range of Reynolds numbers and are amenable to ultrasonic measurement methods. Details of the flow loops are presented, including optimisation studies. Results are presented for a variety of particle characterisation studies that have been performed on the particle species that form the suspensions, along with mean and RMS (root mean square) velocity profiles over a range of Reynolds number and particle concentration. In particular, the effect of particle concentration on the formation of settled beds, and mean flow velocity and turbulence characteristics has been investigated.
Publisher: Elsevier BV
Date: 03-2019
Publisher: Elsevier BV
Date: 04-2015
Publisher: Elsevier BV
Date: 06-2020
Publisher: Elsevier BV
Date: 04-2015
Publisher: Elsevier BV
Date: 07-2017
Publisher: Elsevier BV
Date: 09-2022
Publisher: IEEE
Date: 10-2015
Publisher: IEEE
Date: 09-2016
Publisher: Elsevier BV
Date: 2020
Publisher: Wiley
Date: 25-05-2020
DOI: 10.1002/AIC.16268
Publisher: Begellhouse
Date: 2012
Publisher: Elsevier BV
Date: 2015
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Hugh Rice.