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Dispersion and uptake in a coiled tube

S R Kaye1, P Kavafyan, R C Schroter

  • 1Centre for Biological and Medical Systems, Imperial College of Science, Technology & Medicine, London.

Journal of Biomechanical Engineering
|February 1, 1993
PubMed
Summary

Tracer dispersion in a coiled tube is dominated by gas absorption and desorption at the wet gelatine wall. High tracer solubility reduces the impact of secondary flows on dispersion, confirming prior findings.

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Area of Science:

  • Fluid dynamics
  • Mass transfer
  • Chemical engineering

Background:

  • Tracer dispersion is crucial for understanding transport phenomena in various systems.
  • Secondary flows can significantly influence dispersion patterns in non-straight geometries.
  • Solubility of tracers at interfaces affects their transport behavior.

Purpose of the Study:

  • To investigate the dispersion characteristics of a highly soluble tracer gas in a coiled tube.
  • To determine the dominant mechanisms of tracer dispersion in this geometry.
  • To assess the role of secondary flows and wall interactions on dispersion.

Main Methods:

  • Experimental investigation of tracer gas dispersion.
  • Utilized a coiled tube lined with wet gelatine.
  • Focused on a highly soluble tracer gas.

Main Results:

  • Absorption and desorption of the tracer gas at the wet gelatine wall were identified as the dominant factors in tracer dispersion.
  • The influence of secondary flows on dispersion was found to be reduced when the tracer gas exhibited high solubility in the wall material.
  • Results align with previous findings in branching geometries.

Conclusions:

  • Wall absorption and desorption are key to understanding tracer dispersion in coiled tubes with soluble tracers.
  • The impact of secondary flows on dispersion is diminished by high tracer solubility, irrespective of geometry.
  • This study provides insights into mass transfer and fluid dynamics in confined, non-ideal systems.

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