A new differential pressure flow meter for measurement of human breath flow

Simulation and experimental investigation

Devon Bridgeman, Francis Tsow, Xiaojun Xian, Erica Forzani

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The development and performance characterization of a new differential pressure-based flow meter for human breath measurements is presented in this article. The device, called a "Confined Pitot Tube," is comprised of a pipe with an elliptically shaped expansion cavity located in the pipe center, and an elliptical disk inside the expansion cavity. The elliptical disk, named Pitot Tube, is exchangeable, and has different diameters, which are smaller than the diameter of the elliptical cavity. The gap between the disk and the cavity allows the flow of human breath to pass through. The disk causes an obstruction in the flow inside the pipe, but the elliptical cavity provides an expansion for the flow to circulate around the disk, decreasing the overall flow resistance. We characterize the new sensor flow experimentally and theoretically, using Comsol Multiphysics® software with laminar and turbulent models. We also validate the sensor, using inhalation and exhalation tests and a reference method.

Original languageEnglish (US)
Pages (from-to)956-964
Number of pages9
JournalAICHE Journal
Volume62
Issue number3
DOIs
StatePublished - Mar 1 2016

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Flow simulation
Pipe
Exhalation
Pressure
Inhalation
Software
Sensors
Equipment and Supplies

Keywords

  • Biomedical engineering
  • Computational fluid dynamics
  • Fluid mechanics
  • Transport
  • Turbulence

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Biotechnology
  • Environmental Engineering

Cite this

A new differential pressure flow meter for measurement of human breath flow : Simulation and experimental investigation. / Bridgeman, Devon; Tsow, Francis; Xian, Xiaojun; Forzani, Erica.

In: AICHE Journal, Vol. 62, No. 3, 01.03.2016, p. 956-964.

Research output: Contribution to journalArticle

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