Berlanga Cañete, Félix AntonioOlmedo, InésRuiz de Adana, M.2024-12-092024-12-092016-11-17Berlanga, F. A., Olmedo, I., & Ruiz de Adana, M. (2017). Experimental analysis of the air velocity and contaminant dispersion of human exhalation flows. Indoor Air, 27(4), 803-815. https://doi.org/10.1111/ina.123570905-6947https://doi.org/10.1111/ina.12357https://hdl.handle.net/20.500.14468/24758The registered version of this article, first published in Indoor Air, is available online at the publisher's website: Wiley, https://doi.org/10.1111/ina.12357La versión registrada de este artículo, publicado por primera vez en Indoor Air, está disponible en línea en el sitio web del editor: Wiley, https://doi.org/10.1111/ina.12357Human exhalation flow is a potential source of pathogens that can constitute a cross-infection risk to people in indoor environments. Thus, it is important to investigate the characteristics of this flow, its development, area of influence, and the diffusion of the exhaled contaminants. This paper uses phase-averaged particle image velocimetry together with a tracer gas (CO2) to study two different exhalation flows over time: the exhalation of an average male (test M) and an average female (test F), using a life-sized thermal manikin in a supine position. The exhalation jets generated for both tests are similar in terms of symmetrical geometry, vorticity values, jet opening angles, and velocity and concentration decays. However, there is a difference in the penetration length of the two flows throughout the whole exhalation process. There is also a time difference in reaching maximum velocity between the two tests. It is also possible to see that the tracer gas dispersion depends on the momentum of the jet so the test with the highest velocity decay shows the lowest concentration decay. All these results are of interest to better understand cross-infection risk.eninfo:eu-repo/semantics/openAccess33 Ciencias Tecnológicas::3313 Tecnología e ingeniería mecánicasartículocontaminant dispersionhuman exhalation flowPIVvelocity and concentration decay