GEOFFREY G.
DUFFY
Professor (Personal Chair)
BSc, ASTC Dip N.S.W., PhD, DEng, FRSNZ, FIChemE, CEng
Room: 1.808
Ext.: 87805
Email: gg.duffy@auckland.ac.nz
PRESENT POSITIONS:
Professor of Chemical Engineering
Department of Chemical and Materials Engineering (since 1989)
Associate Dean
Research,
PREVIOUS POSITIONS:
Director, Pulp and Paper
Research Unit, The University of Auckland
Director, Pulp and Paper
Research Organisation of New Zealand, PAPRO NZ, January 1986-September 1988;
Associate Director, Pulp and Paper Research Organisation of New Zealand,
September 1988-March1990;
Professor, and Head of Department of Chemical and Materials Engineering,
August 1989-February 1994;
Associate Professor, Department of Chemical and Materials Engineering,
1976-1988;
Senior Lecturer, Department of Chemical and Materials Engineering, The
University of Auckland,1969-1975;
Lecturer, NSW Institute of Technology, 1965-1969.
PROFESSIONAL AFFILIATIONS:
·
FRS NZ Fellow
of the Royal Society of
·
FIChemE Fellow Institution of
Chemical Engineers,
·
Fellow
Technical Association of the Pulp and Paper Industry, (Tappi),
·
Member Australian and
(Appita),
· Member International Association of Scientific Papermakers
TEACHING ACTIVITIES:
Fluid mechanics,
non-Newtonian fluid flow, solid-liquid two-phase flow, heat transfer, process
dynamics and control, pulp and paper technology.
RESEARCH EXPERTISE:
Flow of wood pulp fibre suspensions and associated problems of flow metering, fibre concentration measurement, pressure pulsations, flocculation, screening, mixing, fibre fractionation, defibration, pneumatic transport of fibres. Infrared heating and drying, wood chip screening, pulp washing, particulate solids transport in fibre suspensions, paper sheet formation and formation-flocculation, energy reduction in mechanical pulping, heat transfer to fibre suspensions, novel processing methods.
CONSULTING AND INDUSTRIAL PROJECTS:
· Consulted widely in New Zealand Australia USA Sweden Norway Finland
· Managing Director of my own consulting and marketing company, Fibre Dynamics Ltd, specialising in infrared drying and fluid mechanics problems.
· Industrial projects include the design of pipeline systems, product development, infrared heating and drying, wet-end problems, paper and pulp testing, pulp characterisation, and fibre processing problems.
· Special projects include technical consultants and expert witness in law suits and project/planning in research organisations.
PRESENT RESEARCH:
Pulp suspension flow and
flocculation flow problems, fibre separation and characterisation, pulp
washing; infrared drying; solids and capsule transport in fibre suspensions;
pulp and fibre characterisation and prediction of final sheet properties; heat
transfer fouling and mitigation
DISTINCTIONS AND AWARDS:
·
New Zealand Science and Technology Silver
Medal, for “an exceptional contribution to industry and the community over
three decades in the field of fluid mechanics of fibre suspensions”, The
Royal Society of New Zealand 2003.
·
ESSO Award from Chemeca
for “Outstanding, innovative, on going published contributions in Chemical
Engineering” in Australasia 2002.
· University Medal Distinguished Teaching Award, The University of Auckland (1995) Merit Awards for excellence in undergraduate teaching, Faculty of Engineering, 1990, 1991, 1997, 1998, and 2003; “Top Twenty” 1999, 2000, 2002, 2004
· Fellow of IPENZ, 1991
· Fellow of TAPPI, 1990
·
Personal Chair
(Professorship), The
· DEng Doctor of Engineering degree, The University of Auckland, 1988
·
FRSNZ Fellow of
the Royal Society of
·
L. R. Benjamin Appita Silver Medal (1982)
· E. R. Cooper Royal Society Medal (1975).
PUBLICATIONS:
218 published journal and conference papers including 10 patents. 62 technical reports.
Some Recent Refereed Publications
Chen, J., Müller-Steinhagen,
H.M., and Duffy, G.G. "Heat transfer enhancement in dimpled tubes", J.
Applied Thermal Eng. 21(5): 535-547 (2001).
Duffy, G.G., Kazi, S.N., Chen, X.D. “Pulp fibre quality measurement from flowing wood pulp fibre suspensions”, Das Papier J., 7: 39-46 (2002).
Duffy, G.G. “The significance of
mechanistic-based models in fibre suspension flow”, Nordic Pulp and Paper
Research J. 18 (1): 74-80 (2003).
Duffy, G.G., Kazi, S.N., Chen, X.D. “Heat transfer to flowing fibre suspensions”. J. Pulp and Paper Science 29 (3): 99-105 (2003).
Duffy, G.G. "Misapplication of the Metzner-Reed non-Newtonian correlation method", Chem. Eng. Communications, 191 (2): 182-188 (2004).
Murton, K., and Duffy, G.G.
“The influence of pulp residence time on refining intensity and pulp
quality”, Appita J. 58 (1): 64-71 (2005).
Patent:
Duffy, G.G., (with Burger, R., Lange, W., Veh, G.
Schabel, S.) “Process for wet screening
fibre suspensions”,
European Patent DEA 102 17 926.3, 2003,
Conference Proceedings:
Song, G., Duffy, G.G. "An investigation of fibre deformations in medium consistency processing", Proceedings of the 55th Annual Appita Conference, Vol.1, 267-278,Tasmania, April (2001).
Kazi, S. N., Duffy, G.G., Chen, X. D. "Heat transfer fouling mitigation with wood pulp fibres" Proceedings of the Heat Exchanger Fouling Conference – Fundamental Approaches and Technical Solutions, Section III, paper 5, 1-7, Davos, Switzerland, July (2001).
Duffy, G.G., Chen, X.D., Kazi, S.N. “Fibre particle characterisation in suspension flow” proceedings of the 15th International Hydrotransport 15 Conference, Vol. 2, 825-842, Banff, Canada, June (2002).
Paul, T., Duffy, G.G., and Chen, X.D. “Simple evaluation methods for
deflocculants and their affect on fibre network
structure”, Proceedings of the 57th Annual Appita
Conference, Paper 1A 42, 57-62,
Duffy, G. G. “A new method of fibre fractionation”, Proceedings of the 57th Annual Appita Conference, Paper 2D 43, 453-458, Melbourne, May (2003).
Duffy, G. G. and Wahjudi
Winters, U. “Some developments for characterising wood pulp fibres in pulp and
paper mills”, Proceedings of the 58th Annual Appita
Conference, Paper 3B32, 421-431,
