Léguillette, RenaudMassie, Shannon2015-09-242015-11-202015-09-242015http://hdl.handle.net/11023/2492Maximal aerobic capacity (VO2max) is considered the reference for determining an individual’s level of fitness. To measure VO2max, a subject must perform an incremental fitness test while wearing a facemask that samples expired gases and ventilation rates. In horses, the practicality of VO2max testing in the field is limited by mask design, specifically due to impedance of airflow. The trajectory of airflow as it enters and exits the nasal passage must therefore be fully understood in order to build a functional mask. Computational fluid dynamics (CFD) was used to model flow patterns and pressure changes at various rates in the equine nasal passage. Results were validated with experimental data obtained from a 3D printed model of a horse head. Preliminary mask designs were investigated using CFD and a current design was tested using the 3D printed model. Data was also collected on sport horses in the field.engUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.Animal PhysiologyVeterinary ScienceEngineering--BiomedicalEquineExercise PhysiologyBiomedical Engineeringmaster thesis10.11575/PRISM/27968