Fan, Zichen, Hadizade, Amin, Degroot, Christopher et Savory, Eric.
2025.
« Characterization of cough mouth opening for accurate CFD boundary conditions ».
In Proceedings of the CSME-CFDSC-CSR 2025 International Congress (Montreal, QC, Canada, May 25-28, 2025)
Coll. « Progress in Canadian Mechanical Engineering », vol. 8.
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Résumé
Airborne diseases have been a critical topic of studyfor decades, particularly following the COVID-19 global pandemic.Coughing plays an important role in the transmission of airbornediseases, serving both as a common respiratory activity and as asymptom of such diseases. Computational Fluid Dynamics (CFD)simulations have been widely employed to investigate the dynamicsof cough airflow. Since the velocity of a single cough is timedependent,accurately modeling its boundary conditions is essential.Previous experimental studies have primarily focused on volumeflow rate data, often assuming a constant mouth opening area tocalculate flow velocity, which can lead to unrealistic results. Giventhe variability of coughs, a representative model is necessary todefine boundary conditions in CFD simulations of coughs. In thisstudy, this model was developed by averaging data from individualcough events. To achieve this, a mathematical model was createdto characterize the mouth opening of human cough. High-speedimaging and image processing techniques were utilized to capturethe dynamics of mouth opening during coughing. Regression analysisemployed an exponential distribution function, showing a time seriesrelationship for the mouth opening area throughout a single cough.Preliminary results demonstrate that the characteristic velocity profilegenerated by the model aligns more closely with experimental coughvelocity data compared to the velocity profile produced by a volumeflow rate model with a constant mouth opening assumption.
| Type de document: | Compte rendu de conférence |
|---|---|
| Éditeurs: | Éditeurs ORCID Hof, Lucas A. NON SPÉCIFIÉ Di Labbio, Giuseppe NON SPÉCIFIÉ Tahan, Antoine NON SPÉCIFIÉ Sanjosé, Marlène NON SPÉCIFIÉ Lalonde, Sébastien NON SPÉCIFIÉ Demarquette, Nicole R. NON SPÉCIFIÉ |
| Date de dépôt: | 18 déc. 2025 15:11 |
| Dernière modification: | 18 déc. 2025 15:11 |
| URI: | https://espace2.etsmtl.ca/id/eprint/32393 |
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