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Trevor Frank Jones

TFJ Consulting Ltd, England

Dr. Jones has been MD of a successful consultancy since 2004. In addition to industrial contacts, he maintains strong academic links with universities in the United Kingdom and internationally and has been appointed external examiner for several Ph.D. and MSc examinations. His extensive list of professional publications includes many technical contributions to the Hydrotransport and Transport and Sedimentation conferences. He takes an active committee role in both organisations. He studied at the University of London. Following an MSc in Thermal Power Engineering and a Ph.D. research degree, Dr. Jones joined the Mining Research and Development Establishment of the National Coal Board. He became a team manager where he led high-value European-funded research projects on the control and management of coal quality, the analysis of coal profiles, and the control of froth-flotation processes. After the closure of British Coal, Dr. Jones became a senior research fellow at the University of Nottingham. He secured research funding for the university with collaborations from Germany, Greece, Belgium, and Holland.

1books edited

3chapters authored

Latest work with IntechOpen by Trevor Frank Jones

Written by experts from around the world, this book presents a comprehensive overview of slurry technology. The editor is grounded in the science of dilute concentrations of coarse particles in horizontal ducts, including settling distributions, critical deposition, swirling flow, and the two-layer model. This volume includes ten chapters that address such topics as process modelling, measurement (including non-Newtonian rheology), high-concentration conveying, vertical transport of fine-particle slurries, rheometry of sludges, pipe wear, and wastewater applications. There is also a chapter on an application at the fringe of our subject: fluidisation.

Advances in Slurry Technology

Advances in Slurry Technology

Edited by Trevor Frank Jones

Chapters authored

Swirl-Inducing Ducts

By Trevor Frank Jones

This chapter examines the flow of swirling liquid in a duct. In many cases, circumferential velocity in the cross-section of a cylindrical duct is a remarkably linear function of radius up to the proximity of the duct wall. This is similar to the behaviour of a twisting solid shaft and the analogy leads to a solid body model for swirl flow in ducts. Helically profiled lobate duct walls provide a twisting torque, while wall friction in simple circular ducts causes swirl to decay. The liquid counterpart of the solid body is represented as a first-order system in downstream distance because of the way torque is transmitted by duct walls rather than by shaft stiffness as in the solid case. The effect of the inertia of the rotating and twisting cylinder is unchanged from its solid counterpart, and damping is related to the viscosity of the liquid acting over the annulus between the rotating liquid cylinder and the duct wall. The shear stress in the liquid is shown to be linearly related to the intensity of the swirl. The generation of swirl is briefly described with reference to lobate designs, their development of shape and helix.

Part of the book: Swirling Flows and Flames

Introductory Chapter: Slurry Technology – New Advances

By Trevor Frank Jones

Part of the book: Advances in Slurry Technology

Solid-Liquid Pipeflows – Holdup and the Two-Layer Model

By Trevor Frank Jones

The relative delay of the flow of solids in a pipe, holdup, is shown to be an important factor in the evaluation of the flow of settling particle-bearing liquids. Holdup can be determined using a new, modified interpretation of the two-layer model, originally published in the 1970s. In the original model, particles in the upper layer of the flow are supported by hydrodynamic forces only, while those in the lower layer are also supported by hindered settling and wall reactions. This concept has been retained in the new model. An initial approximated value of holdup can be refined to allow an increasingly accurate value to be calculated. Innovative coding of the new model overcomes instability and interface positioning problems. Applications for determinations of holdup and the model are examined. Pressure loss, flow rate and the prediction of the pipe velocity to avoid a stationary bed are established. The model allows a locus of stationary bed conditions to be plotted for a family of holdup values. A method to obtain the centre of concentration in the cross section is demonstrated. The locus of centre of concentration (LCC) gives an indication of the position and size of the particle burden as conditions change.

Part of the book: Advances in Slurry Technology

Related collaborators

Julio Marañón Di Leo

National University of La Plata , Argentina

Juan Sebastián Delnero

Lukashov Vladimir

Novosibirsk State University , Russia

Sergey Alekseenko

Institute of Thermophysics , Russia

Guillermo Capittini

Shan Zhong

University of Manchester , United Kingdom

Yuanye Zhou

University of Birmingham , United Kingdom

Vladimir Dulin

Aleksei Lobasov

Dmitriy Markovich

Institute of Thermophysics , Russia