By Gerard G. Emch
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Additional resources for Algebraic Methods in Statistical Mechanics and Quantum Field Theory (Physics & Astronomical Monograph)
0008 ~/em H2o. Their measurements were made with a closed glottis, resulting in a higher compliance than would be found for our experiments. The glottis was at least partially open during all exhalations, reducing its compliance effect. l72). Neglecting this calculation would not significantly affect the results. It should be possible to compensate for the frequency effect of the parallel compliance of throat-mouth-nose cavities in the same way that compensation was made for the compressibility of ~he gas between the mouth and expiratory pneumotachograph.
The two profiles, for which there are two possible reasons. 1 m/s) in which case the difference might be attributed to experimental error. The second, and most likely, is the fact the hot wire was always aligned with the direction of traverse. Since a hot wire responds only to the magnitude of flow normal to its length and not its direction, it is possible that contamination by the secondary flows caused the difference. In any case, the difference is negligible for the purpose of this study. 9 m/s for this case.
443 X 10- 3 U0 2 (6) in centimeters of water for the mean axial velocity in meters per second. ;f'5 dependence upon axial velocity found in turbulent flow 10 in partial support of Pedley's suggestion 8 • However, the pressure drop is lower than would be found for fully turbulent flow. In order to apply this result to the lung, it is of interest to determine the viscous pressure drop across a single tube in such a tree arrangement. The model employed in this study consisted of four orders of branches.