|2016 16th: London|
16th IATP Meeting, July 15th 2016
The meeting was opened by the Chairman, Prof. Sir William Wakeham, who welcomed all present and thanked Prof J.P. Martin Trusler for the excellent arrangements as the local organiser of the meeting. Prof. Wakeham expressed deep sorrow and sadness for the recent loss of Dr Mickey Haynes, a very active member of the thermophysical properties community and Editor of International Journal of Thermophyics.
2. SCIENTIFIC SESSION
2.1. Developing a Torsional Crystal Viscometer for Liquids at High Pressures
2.2. Necessary Conditions for the Proper Use of the Transient Hot-Wire Technique
2.3. Mutual Diffusion in the Ternary Mixture of Water + Methanol + Ethanol: Experiment and Molecular Simulation
2.4. Viscosity Measurements of Hexadecane using a Dual-Capillary Viscometer at Temperatures up to 723 K
2.5. Predicting the Transport Properties in Dense Ionic Fluids from Molecular Simulation: Challenges in Methods and Interaction Models
2.6. Characterization of Molecular Diffusion in Liquids with Dissolved Gases
2.7. Transport Properties of Dilute D2O Vapor from First Principles
2.8. Viscosity and Density of (CO2 + Synthetic crude oil) Mixtures at Temperatures from (298 to 423) K and Pressures from (0.1 to 100) MPa
2.9. Measurements of Mass Diffusion Approaching Critical Point
2.10. On the Proposal of TOTM for High Viscosity Industrial Reference Fluid
2.11. New Correlation for the Viscosity of Normal Butane
2.12. The Viscosity of Squalane Revisited – An Updated Reference Model
2.13. High Pressure Volumetric Properties, Heat Capacities and Thermal Conductivities of di(pentaerythritol) hexa(3,5,5-trimethylhexanoate)
2.14. New Viscosity Measurements on Compressed Liquid n-Tetradecane; Preliminary Results
Each presentation engendered discussion and a few points of special interest are noted here:
a) Regarding Instruments:
- Cl. Junker presented an excellent analysis of the electric field in the sensor of a new torsional crystal viscometer for 200-450 K and up to 100 MPa. Based on a well-founded analysis of the mechanical vibration of the crystal and smoother crystal surfaces, the new instrument aims at an uncertainty of less than 1%. Retrospective analyses of the measurements made with some instruments of this kind at NIST may be possible..
- As many investigators nowadays tend to oversimplify the application of the transient hot-wire technique, G. Tertsinidou presented the necessary conditions for its proper use. She further showed how easily measurements can be wrong, if these conditions are not met.
b) New measurements:
- T. Janzen presented mutual diffusion coefficient measurements in a ternary mixture of Water+Methanol+ Ethanol obtained in a Taylor dispersion instrument, and predictions from molecular simulation results. Prediction was very near the experimental result even with the rather simple potential employed. A Taylor-dispersion instrument was employed by V. Shevtova, to study mass diffusion approaching the critical point of benzene in supercritical CO2 up to 25 MPa, while Th.M. Koller combined study of DLS and MD for reliable determination of mass diffusion of liquids with different dissolved gases.
- Νew viscosity measurements, useful for future reference correlations, of hexadecane using a dual-capillary viscometer at temperatures up to 723 K and 4 MPa, were presented by Y. Sanchez-Vicente. Preliminary viscosity measurements, using the vibrating-wire technique, on compressed liquid n-tetradecane were presented by F. Caetano. These measurements will be useful for a future reference corelation.
- Cl. Calabrese employed a vibrating wire vicometer and an AntonPaar U-tube densimeter, to examine the effect of CO2 in synthetic dead oil, at high temperatures-high pressures conditions.
- New high-pressure measurements of density, heat capacity and thermal conductivity of di(pentaerythritol) hexa(3,5,5-trimethylhexanoate) were presented by J. Fernández.
c) Reference viscosity liquids:
- J.M.N.A Fareleira proposed TOTM as a very suitable liquid for a high temperatures-high pressures deepwater standard. He further discussed its rheological behavior and thermal stability. The tests carried out about these themes, have evidenced a satisfactory performance taking into account the required properties for such application.
- K. Schmidt presented a new correlation for the viscosity of squalane extended in pressure up to 1400 MPa (the previous correlation by Mylona et al. was valid only up to 200 MPa) based on Bair’s data. The two correlations agree well with each other up to 200 MPa.
- R. Hellmann presented their recent work employing kinetic theory to calculate transport properties of D2O in the dilute gas limit. Calculated values are to be employed in the new IAPWS viscosity and thermal conductivity reference correlations.
- S. Herrmann described a new viscosity correlation for n-butane, as a function of temperature and density, based on new precise experimental viscosity data.
- Α.A.H. Padua presented equilibrium and non-equilibrium techniques to simulate transport properties in dense ionic fluids.
3. BUSINESS SESSION
3.1. PROJECTS CONCLUDED
1. Round Robin project on ionic liquids viscosity, and thermal conductivity measurements.
3.2. PROJECTS CONTINUED
The following projects were discussed and it was agreed to continue them:
1. Reference correlations for the viscosity and thermal conductivity of fluids over extended temperature and pressure ranges.
2. Reference correlations for the viscosity and thermal conductivity of D2O over extended temperature and pressure ranges
3. High-temperature high-pressure viscosity standards
4. Two Two new volumes on experimental thermodynamics series published under the auspices of IUPAC. Editor in Chief, W.Wakeham
5. Diffusion nomenclature in the IUPAC Definitions of Symbols & Units
3.3. NEW COLLABORATIVE PROJECTS
6. Reference correlation for Thermal conductivity of Molten Metals
3.4. PROCEDURE FOR IATP ENDORSEMENT
Members were reminded that if they wish to have the endorsement of IATP for their work they should submit it to the Secretary in the first instance to arrange a rapid review. Referees agreed to participate in the review process in addition to the Executive Member are A. Fröba, J.M. Trusler, M.L. Huber, E. May, and K. Marsh.
Prof. M.J. Assael reminded everyone that all information about IATP activities, as well as the current list of members, can always be found at
http://transp.cheng.auth.gr/ -> I.A.T.P.
It was also decided that members who had not attended for some time, and where there was evidence that they would not have a continuing connection, would be removed form the list.
The following new member was approved:
5. FUTURE MEETINGS
5.1. 17th IATP Meeting, 2017
5.2. 18th IATP Meeting, 2018
5.3. 19th IATP Meeting, 2019
6. LIST OF ATTENDEES
List of people that attended the meeting:
1) Prof. Sir William A. Wakeham (UK), Chairman
3) Prof, Eckard Bich (Germany)