Feldmann, Daniel and Wagner, Claus (2013) Numerical Simulation of the Oscillatory Ventilation in Simplified Human Lung Models. In: New Results in Numerical Experimental Fluid Mechanics VIII Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 121. Springer Verlag, Heidelberg New York Dordrecht London. pp. 591-598. doi: 10.1007/978-3-642-35680-3_70. ISBN 978-3-642-35679-7.
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Official URL: http://link.springer.com/chapter/10.1007/978-3-642-35680-3_70
Abstract
To improve the understanding of gas transport mechanisms under conditions of high-frequency oscillatory ventilation (HFOV), we performed numerical simulations of the unsteady flow in simplified airway geometries using time varying Dirichlet boundary conditions (BC) for the pressure. The flow in a generic trachea shows excellent agreement with the analytical solution for non-dimensional frequencies up to Wo = 14. Nonetheless, the computational effort increases with Wo due to a long relaxation phase and strong velocity gradients near the wall despite of relatively low Reynolds numbers.We also use the pressure BCs on multiple open outlets at a single bifurcation and a three-generation airway model, while guaranteeing mass conservation. By employing identical and slightly different pressure values at the distal bifurcation ends, flow fields are reproduced, similar to that occurring under conditions of uneven physiological behaviour of different lung regions.
Item URL in elib: | https://elib.dlr.de/66368/ | ||||||||||||||||||||||||
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Document Type: | Contribution to a Collection | ||||||||||||||||||||||||
Additional Information: | Online ISBN: 978-3-642-35680-3 | ||||||||||||||||||||||||
Title: | Numerical Simulation of the Oscillatory Ventilation in Simplified Human Lung Models | ||||||||||||||||||||||||
Authors: |
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Date: | January 2013 | ||||||||||||||||||||||||
Journal or Publication Title: | New Results in Numerical Experimental Fluid Mechanics VIII | ||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||
Open Access: | Yes | ||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||
In SCOPUS: | No | ||||||||||||||||||||||||
In ISI Web of Science: | No | ||||||||||||||||||||||||
Volume: | 121 | ||||||||||||||||||||||||
DOI: | 10.1007/978-3-642-35680-3_70 | ||||||||||||||||||||||||
Page Range: | pp. 591-598 | ||||||||||||||||||||||||
Editors: |
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Publisher: | Springer Verlag, Heidelberg New York Dordrecht London | ||||||||||||||||||||||||
Series Name: | Notes on Numerical Fluid Mechanics and Multidisciplinary Design | ||||||||||||||||||||||||
ISBN: | 978-3-642-35679-7 | ||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||
Keywords: | Bio-Fluid Dynamics, Numerical Simulation, High-Frequency Oscillatory Ventilation, Artifical Respiration | ||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||
HGF - Program: | Aeronautics | ||||||||||||||||||||||||
HGF - Program Themes: | Aircraft Research (old) | ||||||||||||||||||||||||
DLR - Research area: | Aeronautics | ||||||||||||||||||||||||
DLR - Program: | L AR - Aircraft Research | ||||||||||||||||||||||||
DLR - Research theme (Project): | L - Simulation & Validation (old) | ||||||||||||||||||||||||
Location: | Göttingen | ||||||||||||||||||||||||
Institutes and Institutions: | Institute of Aerodynamics and Flow Technology > Fluid Systems | ||||||||||||||||||||||||
Deposited By: | Feldmann, Daniel | ||||||||||||||||||||||||
Deposited On: | 15 Feb 2013 14:27 | ||||||||||||||||||||||||
Last Modified: | 31 Jul 2019 19:29 |
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