Tachikawa number: A proposal

JD Holmes, Christopher Baker, Y Tamura

Research output: Contribution to journalArticle

46 Citations (Scopus)


This paper describes the studies of windborne debris by Masao Tachikawa and shows that a parameter defined by him, representing the ratio of aerodynamic to gravity forces, is the main nondimensional parameter determining the trajectories of debris items of all types. A case for naming this parameter as the "Tachikawa Number" is made. (c) 2005 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)41-47
Number of pages7
JournalJournal of Wind Engineering and Industrial Aerodynamics
Publication statusPublished - 1 Jan 2006


  • debris
  • Tachikawa parameter


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