A theoretical model of critical heat flux in flow boiling at low qualities

Hyuk Sung Kwon, Dae Hyun Hwang, Ho Young Kim, Yongchan Kim

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A new theoretical critical heat flux (CHF) model was developed for the forced convective flow boiling at high pressure, high mass velocity, and low quality. The present model for an intermittent vapor blanket was basically derived from the sublayer dryout theory without including any empirical constant. The vapor blanket velocity was estimated by an axial force balance, and the thickness of vapor blanket was determined by a radial force balance for the Marangoni force and lift force. Based on the comparison of the predicted CHF with the experimental data taken from previous studies, the present CHF model showed satisfactory results with reasonable accuracy.

Original languageEnglish
Pages (from-to)921-930
Number of pages10
JournalKSME International Journal
Issue number7
Publication statusPublished - 2001 Jul


  • Critical heat flux
  • Flow boiling
  • Pressurized water reactor
  • Sublayer dryout model
  • Theoretical model

ASJC Scopus subject areas

  • Mechanical Engineering


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