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Development of new spacer device geometry: a CFD study (Part I)

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  • Ricardo Oliveira
  • Senhorinha Teixeira
  • Luís Silva
  • José Teixeira
  • Henedina Antunes

Abstract

Asthma is a widespread disease, affecting more than 300 million individuals. The treatment in children is based upon an administration of a pressurised metered-dose inhaler added with a spacer. The efficiency of drug delivery to the patient is strongly affected by the transient airflow pattern inside the spacer device. This paper presents a computational fluid dynamics (CFD) analysis of airflow inside a commercially available spacer device with wide application. This study, carried out in Fluent™, was the basis of an optimisation procedure developed to improve the geometry of the spacer and develop a more efficient product. The results show that an appropriate control of the boundary layer development, by changing the spacer shape, reduces the length of the recirculation zones and improves the flow. It can be concluded that CFD is a powerful technique that can be successfully applied to optimise the geometry of such medical devices.

Suggested Citation

  • Ricardo Oliveira & Senhorinha Teixeira & Luís Silva & José Teixeira & Henedina Antunes, 2012. "Development of new spacer device geometry: a CFD study (Part I)," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 15(8), pages 825-833.
    • Handle: RePEc:taf:gcmbxx:v:15:y:2012:i:8:p:825-833
    DOI: 10.1080/10255842.2011.563359
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    Cited by:

    1. Concepción Paz & Eduardo Suárez & Oscar Parga & Jesús Vence, 2017. "Glottis effects on the cough clearance process simulated with a CFD dynamic mesh and Eulerian wall film model," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 20(12), pages 1326-1338, September.

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