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2003 3rd: Boulder PDF Print
3rd IATP Meeting
Boulder, 21 - 22 June 2003

Program in .pdf format

The meeting was opened by the Chairman, Prof. W.A. Wakeham, who welcomed all present and thanked Dr R. Perkins for the excellent arrangements as the local organiser of the meeting. The meeting was divided into the usual scientific session and a business session. The proceedings are recorded here in that order.


2.1. Viscosity and Surface Tension of Diisodecylphthalate
A.P. Froeba, A. Leipertz (Germany

2.2. Measurement and Correlation of the Viscosity of Water Vapour at Low Densities
E. Vogel, V. Teske (Germany

2.3. A Vibrating Wire Viscometer
M. Kandil, K N Marsh (Australia

2.4. Simultaneous Measurement of Viscosity and Density with an Oscillating-disk Instrument
A.H. Krall, J.V. Sengers (USA)

2.5. Viscosities of Some Molten Metals Including Fe and Al.
Y. Sato (Japan)

2.6. Uncertainty Analyses According to the Guide to the Expression of Uncertainty in Measurement
L. Vozar, W. Hohenauer (Slovakia

Each presentation engendered discussion and a few points of special interest are noted here:
a) Dr A. Froeba presented measurements of the viscosity of diisododecylphthalate performed in three laboratories (Prof. A. Leipertz in Erlangen, Dr H. Bauer in Hamburg and Prof. J. Fareleira in Lisbon). The purpose of this task was to examine the possibility of proposing diisodocylphthalate as a high-viscosity standard. The differences between the results of the various laboratories were complicated by the possibility that the viscosity depended upon the purity of the sample of the fluid and/or its supplier. Discussion revealed that further work within and between the three laboratories concerned was necessary before any definitive statements could be made.
b) Dr E. Vogel presented his new measurements of the viscosity of water vapour. The measurements were important as they were performed as part of an on-going project between IATP and IAPWS and aim to fill a gap in the low-density region in the viscosity of water vapour.
c) Dr K. Marsh presented a new oscillating-disk viscometer designed for measurements of the viscosity in gases and liquids.
d) Prof. J. Sengers discussed the problems associated with the simultaneous measurements of viscosity and density in oscillating-disc instruments
e) Prof. Y. Sato discussed the large discrepancies in the viscosity data of molten metals, and their alloys, while Prof. L. Vozar presented an uncertainty analysis in measurements.


The following projects were discussed:

1. Viscosity of Cyclopentane
N. Dalaouti, M.J. Assael (Greece), H. Bauer (Germany), K. Harris (Australia)
The project was concluded, and internally refereed. Hence, it will be submitted "under the guidance of IATP".
2. Viscosity of Toluene at Atmospheric Pressure in Wide Ranges of Temperature.
F.J.V. Santos, C.A. Nieto de Castro (Portugal), J.H. Dymond (UK),
N. Dalaouti, M.J. Assael (Greece), A. Nagashima (Japan)
The project for a separate publication was abandoned because the recent high-pressure correlation prepared under the guidance of IATP, included this particular low-pressure zone. Furthermore although the project was approved as complete in 1998, the paper had never submitted.
3. Viscosity of n-Pentane
A. Laesecke (USA), E. Vogel, A. Leipertz (Germany)
Project will stop due to lack of data as demonstrated by A. Froeba.
4. Correlation of the Thermal Conductivity of R134a.
R. Perkins, A. Laesecke, J.V. Sengers (USA)
Project will stop.

The following projects were discussed and it was agreed to continue them:
5. Viscosity of Alkali Chlorides
H. Oye (Norway), C.A. Nieto de Castro (Portugal)
The project continues although the group would wish to see some results at the next meeting if practicable.
6. Viscosity and Thermal Conductivity of Water & Steam
M.J. Assael (Greece), A. Nagashima (Japan), D. Friend, J.V. Sengers (USA),
E. Vogel (Germany)
The project continues. Mrs I. Metaxa has already concluded the zero-density viscosity correlation. This new correlation performed with the aid of Prof. E. Vogel, employed 12 sets of measurements (Alexandrov's correlation employed only 8) as well as the new low-density viscosity measurements of Prof. E. Vogel. It is hoped that a new correlation for the viscosity of water will be presented in the IAPWS Meeting in Kyoto in 2004.
7. Investigation of a New High-Viscosity Standard
J.M.N.A. Fareleira, C.M.B.P. Oliveira (Portugal), M.J. Assael (Greece),
A. Leipertz, H. Bauer (Germany), A. Nagashima (Japan)
Diisododecylphthalate is under investigation. Measurements of its
viscosity were performed in three laboratories (Prof. A. Leipertz's,
Prof. J. Fareleira's and Dr H. Bauer's). Results are still examined.
8. On the Book on the Properties of Water, Air and Sea Water
A. Nagashima (Japan), M.J. Assael (Greece), J. Millat (Germany).
Project continues.
9. Feasibility Study on Properties of Ionic Fluids
A. Heintz (Germany), K. Marsh (New Zealand), Padua (France), Fareleira (Portugal)
Project continues.

The following project was discussed and it was agreed to start:
10. Viscosity of D2O
M.J. Assael (Greece), A. Nagashima (Japan), D. Friend, J.V. Sengers (USA),
E. Vogel (Germany)
11. Viscosity of SF6
E. Vogel (Germany), A. Laesecke (USA)
12. Thermal Conductivity of SF6
R. Perkins, J.V. Sengers, J. Baranski (USA)

The group considered the issue of membership, corresponding membership and other forms of membership.

It remained the intent of the body that full membership of IATP (as in IUPAC earlier) was intended to be granted to those with a considerable international reputation in the field and a position of leadership within it. It was resolved that this level of membership was still to be granted by the invitation of the Chairman following the recommendation of exiting members of the group.

On the other hand it was recognised that there were several laboratories in the world engaged in transport property research that had never attended meetings and had seldom, if ever, been invited. This seemed equally to be unfortunate since IATP lost by their absence and the groups and/or individuals missed the opportunity to engage with an expert group in a manner that had proved very successful over more than 20 years.

It was agreed that for subsequent meetings invitations to attend should be distributed to all those delivering papers on transport properties at the Boulder conference. The idea was to increase awareness and participation without the formality of establishing membership or corresponding membership status.

The secretary would arrange for the invitations to be issued in due course.

The following dates and places of the IATP meetings were decided

5.1. IATP Meeting in 2004
In the immediate interests of involving one group of researchers with a big activity who had not participated in the meetings of IUPAC or now IATP, it was suggested that Professor Christian Boned be asked if he would host a meeting in July 2004. As a result of consultation after the formal meeting it has been agreed that the 2004 meeting of IATP will take place in Pau (France) in early July. The local host will be Prof. C. Boned.




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