Details of Grant 

EPSRC Reference:	GR/R15474/01
Title:	Development of a Generalised Helmholtz Equation For the Calculation of Thermodynamic Properties of Fluid Mixtures
Principal Investigator:	Trusler, Professor JPM
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department:	Chemical Engineering
Organisation:	Imperial College London
Scheme:	Fast Stream
Starts:	14 May 2001	Ends:	13 September 2004	Value (£):	63,894
EPSRC Research Topic Classifications:	Continuum Mechanics Fluid Dynamics
EPSRC Industrial Sector Classifications:	Manufacturing Chemicals Energy No relevance to Underpinning Sectors
Related Grants:
Panel History:
Summary on Grant Application Form
The purpose of the proposed research is to develop a generalised Helmholtz equation for the calculation of thermodynamic properties of fluid mixtures. The basic idea is to use the Helmholtz function of a substance that obeys the principle of corresponding states to determine the reference potential and to calculate the perturbation term either from experimental information on binary systems or by using a corresponding states approach in the event that data are not available. The present implementation of the model does not include a perturbation term. The model works well for the single phase properties but fails to represent adequately the phase behaviour properties. The form of the perturbation contribution is largely empirical in nature and will be constructed specifically to improve the calculation of the phase behaviour of fluid mixtures. A generalised form based on the principle of corresponding states will be desirable in order to minimise the number of required interaction parameters. If limited data are available on particular mixtures these can be used to obtain optimised interaction parameters which would result in accuracies approaching the experimental uncertainties. However, even in the absence of experimental information, the model will still yield good predictions since the principle of corresponding states is known to be strongly predictive. The mixing rules to be considered should make it possible to reproduce accurately the critical parameters, a necessary condition for obtaining accurate phase properties.
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Organisation Website:	http://www.imperial.ac.uk