Miscible displacements with a chemical reaction in a capillary tube

Yuichiro Nagatsu, Yuji Hosokawa, Yoshihito Kato, Yutaka Tada, Toshihisa Ueda

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Miscible displacement of a more-viscous liquid by a less-viscous one with a chemical reaction in a capillary tube was investigated experimentally and theoretically. In such a flow field, the less-viscous liquid continuously leaks from the tip of the fingershaped boundary between the two liquids to form another thin finger depending on flow condition. This is called a "spike." Experimental results show that in the spike product is clearly or scarcely observed when the initial reactant concentration in the less-viscous liquid is sufficiently larger or smaller than the stoichiometry, respectively. On the basis of theoretical results, a model is proposed in which the difference in the reaction plane's location in either the less-viscous liquid or in the boundary (determined by the variation in the initial reactant concentrations) results in a significant difference between the locations of the boundary and the reaction plane, this difference being affected by the spike configuration of the boundary.

Original languageEnglish
Pages (from-to)601-613
Number of pages13
JournalAIChE Journal
Issue number3
Publication statusPublished - 2008 Mar
Externally publishedYes


  • Convection- diffusionreaction analysis
  • Miscible displacement
  • Reacting flow
  • Spike formation
  • Viscous fingering

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)


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