Settling of dilute and semidilute fiber suspensions at finite Re

Juha Salmela, D. M. Martinez (Corresponding Author), M. Kataja

Research output: Contribution to journalArticleScientificpeer-review

18 Citations (Scopus)


The motion of tracer fibers settling in a suspension made optically transparent using an index-of refraction matching technique is studied as a function of concentration, aspect ratio, fluid viscosity, and fiber length distribution. At Re ∼ O(1), two different regimes of sedimentation are clearly identified. For small volume fractions we find that fibers settle with their long-axis preferentially in the horizontal state. With increasing volume fraction, fibers settle preferentially with their long-axis aligned in the direction of gravity. These findings are strikingly different than for those conducted with Re → 0 and qualitatively support the numerical simulations reported by Kuusela et al.
Original languageEnglish
Pages (from-to)1916-1923
JournalAIChE Journal
Issue number8
Publication statusPublished - 2007
MoE publication typeA1 Journal article-refereed


  • Fibers
  • Fluid mechanics
  • Setting/sedimentation

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