南開科技大學圖書館 |

言語: 日文

ヘルプ

南開科技大學

圖書館首頁

編目中圖書申請

ログイン

ホームページ

スイッチ: ラベル | MARC形式 | 国際標準書誌記述(ISBD)

Pulsatile flow across cylinders: A ...

Lin, Yu-chun.

Pulsatile flow across cylinders: A model of flow in a total artificial lung.

レコード種別:	コンピュータ・メディア : 単行資料
タイトル / 著者:	Pulsatile flow across cylinders: A model of flow in a total artificial lung./
著者:	Lin, Yu-chun.
記述:	133 p.
注記:	Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 1117.
含まれています:	Dissertation Abstracts International68-02B.
主題:	Engineering, Biomedical. -
電子資源:	Download PDF (下載PDF全文)

Pulsatile flow across cylinders: A model of flow in a total artificial lung.
Lin, Yu-chun.

Pulsatile flow across cylinders: A model of flow in a total artificial lung. - 133 p.

Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 1117.

Thesis (Ph.D.)--University of Michigan, 2007.

The focus of this study is an experimental apparatus that serves as a model for studying blood flow in a total artificial lung (TAL), a prototype device intended to serves as a bridge to lung transplantation or that supports pulmonary function during the treatment of severe respiratory failure. The TAL consists of hollow cylindrical fibers that oxygen-rich air flows through and oxygen-poor blood flows around. Since gas diffusivity in the TAL is very small, a convection mechanism dominates the gas transport, which is why we focus on the velocity around the fibers (modeled as a 0.05-cm-in-diameter and 5-cm-long cylinder). We designed a low-speed water tunnel to study the flow mechanism around the cylinder, across which the flow is generated by a linear actuator that allows different flow patterns to mimic the flow in a TAL. Knowledge gained from the flow around cylinders is beneficial for understanding flow patterns around fibers in TALs. We present summary of vortex formation behind a cylinder for Reynolds numbers (Re) of 1-5 and Stokes numbers (Ns) of 0.18-0.37; results show that higher Re and Ns favor vortex formation, and vortices were observed in low Reynolds numbers where no vortex was formed in steady flow. The vortex structures behind two cylinders with different configurations were also investigated using PIV method and compared with numerical results. It is shown that the arrangement of the cylinders plays an important role in the vortex structures behind the cylinders. These findings regarding the parameter range for vortex formation and effects of fibers' configurations may provide principles for designing artificial lungs to enhance convective mixing. We anticipate that the pulsatile flow circuit presented here can be used to mimic the flow not only in TALs but in other physiological systems.Subjects--Topical Terms:

1000005515
Engineering, Biomedical.

Pulsatile flow across cylinders: A model of flow in a total artificial lung.
LDR:02739nmm 2200265 4500 001 1000005006
005 20081017121300.5
008 081017s2007 ||||||||||||||||| ||eng d
035 $a (UMI)AAI3253338
035 $a AAI3253338
040 $a UMI $c UMI{me_controlnum}
100 1 $a Lin, Yu-chun. $3 1000006186
245 1 0 $a Pulsatile flow across cylinders: A model of flow in a total artificial lung.
300 $a 133 p.
500 $a Source: Dissertation Abstracts International, Volume: 68-02, Section: B, page: 1117.
500 $a Adviser: Joseph L. Bull.
502 $a Thesis (Ph.D.)--University of Michigan, 2007.
520 $a The focus of this study is an experimental apparatus that serves as a model for studying blood flow in a total artificial lung (TAL), a prototype device intended to serves as a bridge to lung transplantation or that supports pulmonary function during the treatment of severe respiratory failure. The TAL consists of hollow cylindrical fibers that oxygen-rich air flows through and oxygen-poor blood flows around. Since gas diffusivity in the TAL is very small, a convection mechanism dominates the gas transport, which is why we focus on the velocity around the fibers (modeled as a 0.05-cm-in-diameter and 5-cm-long cylinder). We designed a low-speed water tunnel to study the flow mechanism around the cylinder, across which the flow is generated by a linear actuator that allows different flow patterns to mimic the flow in a TAL. Knowledge gained from the flow around cylinders is beneficial for understanding flow patterns around fibers in TALs. We present summary of vortex formation behind a cylinder for Reynolds numbers (Re) of 1-5 and Stokes numbers (Ns) of 0.18-0.37; results show that higher Re and Ns favor vortex formation, and vortices were observed in low Reynolds numbers where no vortex was formed in steady flow. The vortex structures behind two cylinders with different configurations were also investigated using PIV method and compared with numerical results. It is shown that the arrangement of the cylinders plays an important role in the vortex structures behind the cylinders. These findings regarding the parameter range for vortex formation and effects of fibers' configurations may provide principles for designing artificial lungs to enhance convective mixing. We anticipate that the pulsatile flow circuit presented here can be used to mimic the flow not only in TALs but in other physiological systems.
590 $a School code: 0127.
650 4 $a Engineering, Biomedical. $3 1000005515
650 4 $a Engineering, Mechanical. $3 170925
690 $a 0541
690 $a 0548
710 2 $a University of Michigan. $3 1000005611
773 0 $t Dissertation Abstracts International $g 68-02B.
790 1 0 $a Bull, Joseph L., $e advisor
790 $a 0127
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3253338 $z Download PDF (下載PDF全文)