Notes on junction coefficients

Eero Matti Salonen*, Rauno Holopainen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review


Application of the principle of the balance of mechanical energy gives a constraint on the possible values of the junction coefficients at a duct system junction. In some cases the recorded junction coefficients in the literature do not satisfy this constraint. The values given may then be questionable. The terminology in connection with junctions is discussed and the role of the principle of balance of mechanical energy in duct system flow modelling is considered in some detail.

Original languageEnglish
Pages (from-to)191-196
Number of pages6
JournalInternational Journal of Ventilation
Issue number2
Publication statusPublished - 1 Sep 2010
MoE publication typeA1 Journal article-refereed


  • Balance of mechanical energy
  • Dissipation
  • Duct system flows
  • Junction coefficients

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