Saturation points of specified entropy

Research output: Contribution to journalArticle


A new algorithm to find the saturation conditions of a pure substance or mixture of specified entropy is proposed. An interesting aspect is that the type of saturation point, whether a dew or bubble point, is a priori unknown. This poses particular challenges to providing good initial estimates that ensure numerical convergence of the phase equilibrium equations. A safe initialization procedure is proposed. The examples show applications of the model to computations with pure methane, pure carbon dioxide, natural gas, and contaminated carbon dioxide. The algorithm succeeds in determining the saturation condition in all of these cases.

Original languageEnglish
Pages (from-to)105-109
Number of pages5
JournalFluid Phase Equilibria
Issue number1
Publication statusPublished - 15 Feb 2011



  • Bubble point
  • Dew point
  • Equations of state
  • Isentropic
  • Saturation

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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