Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Faculty of Engineering | en_US |
| dc.creator | Liu, Yuxuan | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/5692 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | - |
| dc.rights | All rights reserved | en_US |
| dc.title | The flow characteristic and particle deposition in human upper airways | en_US |
| dcterms.abstract | In this thesis, the air flow and particle motion in human lung airway are numerically investigated using CFD technique. Firstly, the 1st-order steady flow, 2nd-order steady flow and unsteady models was used to simulate the flow in laminar regime to comparison the flow characteristic and particle deposition efficiencies among these three models. The upper airway model was generated from CT scan images which represented the real airways. Computation carried out in the Reynolds number of 600 and 720 while stokes number ranging from 0.00014 to 0.022. The results show that the larynx jet has serious effect on the flow structure and particle deposition patterns in trachea. Due to the laryngeal effect, some turbulence features can be expected in trachea. Therefore, laminar, LRN k-omega and large eddy simulation models were used to understand the turbulence features. Computations were carried out at Reynolds number of 1200 and 3600. Flow field was studied in detail. The results show that large eddy simulation is more sensitive than the other two models. | en_US |
| dcterms.extent | x, 106 leaves : ill. (some col.) ; 30 cm. | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2010 | en_US |
| dcterms.educationalLevel | All Master | en_US |
| dcterms.educationalLevel | M.Sc. | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.LCSH | Airway (Medicine) -- Tomography | en_US |
| dcterms.LCSH | Computational fluid dynamics | en_US |
| dcterms.LCSH | Turbulence -- Mathematical models | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| b23568380.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 3.82 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/5692