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Secondary Flow Effects as Physical Mechanism of Molecular Species Transport in Highly Oscillating Generic-Trachea Flows

Rütten, Markus and Krenkel, Lars and Kessler, Roland (2012) Secondary Flow Effects as Physical Mechanism of Molecular Species Transport in Highly Oscillating Generic-Trachea Flows. 83rd Annual Scientific Conference of the International Association of Applied Mathematics and Mechanics, 26.-30. März 2012, Darmstadt, Germany.

Full text not available from this repository.

Official URL: http://www.gamm2012.tu-darmstadt.de/

Abstract

The high frequency oscillation artificial respiration technique is often the last hope for patients to survive highly damaged lung tissue. The mortality can significantly be reduced. In comparison to conventional artificial respiration the applied volume flow rate and pressure is significantly lowered in order to avoid further damaging of lung tissue and remaining intact alveolae. However, the physical mechanism of transport of oxygen to the aeriols under high frequency oscillation is not well understood. In the upper part of the lung convection is dominant, in contrast, the gas exchange in the lower parts of the lung is mainly driven by diffusion. It is not clear how associated gradients of concentrations of different molecular species are then achieved. Highly oscillating fluid flows has been a long research topic in fluid dynamics. It is known that oscillating pressure fluctuations are able to induce secondary flows, in particular, in curved ducts and pipes. The question is, whether the trachea enforces the generation of secondary flow by its kidney like cross section geometry. The influence of molecular species of different densities onto the formation of secondary flows and the convectional transport within the trachea is investigated. In order to clarify the physical mechanisms behind flow simulations have been conducted by using state of the art CFD techniques.

Item URL in elib:https://elib.dlr.de/75733/
Document Type:Conference or Workshop Item (Other)
Title:Secondary Flow Effects as Physical Mechanism of Molecular Species Transport in Highly Oscillating Generic-Trachea Flows
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rütten, MarkusUNSPECIFIEDUNSPECIFIED
Krenkel, LarsUNSPECIFIEDUNSPECIFIED
Kessler, RolandUNSPECIFIEDUNSPECIFIED
Date:2012
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:Section 13.5: Flow Control V
Page Range:p. 290
Series Name:Book of Abstracts
Status:Published
Keywords:Generic-Trachea Flows, CFD
Event Title:83rd Annual Scientific Conference of the International Association of Applied Mathematics and Mechanics
Event Location:Darmstadt, Germany
Event Type:international Conference
Event Dates:26.-30. März 2012
Organizer:Technische Universität Darmstadt
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 - Systems & Cabin (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > High Speed Configurations
Deposited By: Micknaus, Ilka
Deposited On:13 Jul 2012 07:49
Last Modified:13 Jul 2012 07:49

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