On Particle Image Velocimetry (PIV) measurements in the breathing zone of a thermal breathing manikin

David Marr, Hiroshi Higuchi, Tanveer Khan, Jianshun Zhang, Mark Glauser

Research output: Contribution to journalConference Articlepeer-review

29 Scopus citations


A time-resolved PIV system has been employed to obtain quantitative velocity vectors in the breathing zone (nose only) of a thermal manikin that is placed within an Indoor Air Flow-field Laboratory (IAFL). Phase averaged (with breathing cycle) velocity measurements are taken in a vertical plane down the center of the manikin face. During exhalation, an interaction between the shear layers of the air jets from the nose and the buoyant flow created by the thermal plume of the manikin is observed. A threefold increase in local turbulence intensity was found during the exhale part of the breathing waveform when compared to ambient values in the laboratory (when there was no breathing) and to the results of other studies. These results suggest that the unsteadiness associated with the breathing cycle is critical for quantifying human exposure to pollutants indoors and the associated health risk as well as for validating CFD.

Original languageEnglish (US)
Article number4813
Pages (from-to)299-305
Number of pages7
JournalASHRAE Transactions
Volume111 PART 2
StatePublished - 2005
EventAmerican Society of Heating, Refrigerating and Air-Conditioning Engineers, ASHRAE 2005 Annual Meeting - Denver, CO, United States
Duration: Jun 25 2005Jun 29 2005

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering


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