Theory of supercritical flames with real-fluid equations of state

Wenkai Liang, Chung K. Law

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We report a theoretical analysis of the propagation and structure of the planar adiabatic/radiative flame in supercritical fluids, employing the Van der Waals and the Redlich-Kwong equations of state to describe the fluid properties. It is demonstrated that the effective molecular volume and attractive force terms in these non-ideal equations of state show opposite effects on the density modification, especially in the upstream unburned region. Furthermore, the non-ideal effect is found to strongly couple with radiative emission and reabsorption, whose respective weakening and strengthening effect can substantially affect the state of radiation-induced quenching. The theory is useful for the description of high-pressure flames as both the non-ideal state and radiation become more pronounced under such conditions.

Original languageEnglish (US)
Pages (from-to)1002-1018
Number of pages17
JournalCombustion Theory and Modelling
Issue number6
StatePublished - 2021
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Modeling and Simulation
  • Fuel Technology
  • Energy Engineering and Power Technology
  • General Physics and Astronomy


  • equation of state
  • flame theory
  • supercritical fluids


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