Analyses on deformation of helical flagella of Salmonella

Yasunari Takano, Seishi Kudo, Megumi Nishitoba, Yukio Magariyama

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


In the present investigation, we constructed formulation to analyze the deformation of flagellar filament combining the evolution equations for space curves with the Kirchhoff rod model as well as the detailed structure of the filament of Salmonella. In the analytical results of the present study, experimental results of the large elongation of close-coiled filament (Hoshikawa and Kamiya, 1985) and the small deformation of normal filament rotating in water (Kudo et al.) are reproduced. Comparing the results of deformation of flagellar filament between the analyses and the experiments, the torsional and the flexural rigidity of the flagellar filament are estimated to be GJ = 4.6 pNμm2 and EI = 6.1 pNμm2.

Original languageEnglish
Pages (from-to)513-520
Number of pages8
JournalJSME International Journal, Series C: Mechanical Systems, Machine Elements and Manufacturing
Issue number4
Publication statusPublished - 2006 Jun 15


  • Flagellar deformation
  • Flagellar hydrodynamics
  • Kirchhoff rod model
  • Polymorphic flagellar form
  • Resistive-force theory
  • Salmonella

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


Dive into the research topics of 'Analyses on deformation of helical flagella of Salmonella'. Together they form a unique fingerprint.

Cite this