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Evaporation characteristics of the 3-pentanone–isooctane binary system

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Abstract

The results of a numerical and experimental investigation into the evaporation characteristics of the 3-pentanone–isooctane binary system are presented. The behaviour of the system is shown to be nonideal, exhibiting positive deviations from Raoult's law. Thus, the evaporation characteristics of 3-pentanone–isooctane mixtures are shown to be controlled by the relative mole fractions of the two components contained within the liquid phase. The preferential evaporation of 3-pentanone from mixtures containing low concentrations of 3-pentanone is predicted numerically and is confirmed experimentally. The implications of this result with respect to the use of 3-pentanone as a fluorescence marker for isooctane fuel in engine research are discussed at length. The influence high 3-pentanone concentrations on the atomisation behaviour and the optical depth of 3-pentanone–isooctane mixtures is predicted and discussed.

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Abbreviations

A :

empirical constant

B :

empirical constant

C :

empirical constant

D :

empirical constant

P :

total pressure

P c :

critical pressure

P i 0 :

vapour pressure of component i

T :

absolute temperature

T c :

critical temperature

x i :

liquid-phase mole fraction of component i

y i :

vapour-phase mole fraction of component i

γ i :

activity coefficient of component i

γ i ∞ :

activity coefficient of component i at infinite dilution

η :

liquid viscosity

θ :

1−(T/T c), see Eq. (5)

ρ :

liquid density

σ :

surface tension

Λ ij :

empirical constant

1:

isooctane

2:

3-pentanone

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Authors and Affiliations

  1. Department of Mechanical Engineering, University College London, Torrington Place, WC1E 7JE, London, England

    M. Davy & P. Williams

  2. Combustion Research Facility, Sandia National Laboratories, Livermore, CA, USA

    D. Han & R. Steeper

Authors
  1. M. Davy
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  2. P. Williams
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  3. D. Han
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  4. R. Steeper
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Correspondence to M. Davy.

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Davy, M., Williams, P., Han, D. et al. Evaporation characteristics of the 3-pentanone–isooctane binary system. Exp Fluids 35, 92–99 (2003). https://doi.org/10.1007/s00348-003-0639-4

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  • DOI: https://doi.org/10.1007/s00348-003-0639-4

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