Long Bubble Penetration through Viscoelastic Fluids in a Suddenly Contracting and Expanding Tube
This study investigated the properties of long bubbles penetrating viscoelastic fluids in a suddenly contracting and expanding tube. Injection gas flow is controlled by a mass flow controller (MFC). Some of dimensionless parameters, such as the capillary number (Ca), the Reynolds number (Re), the fr...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/6702679 |
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| author | Ching-Chuan Chang Huang-Chih Lin Ming-Yuan Lin Te-Hui Tsai |
| author_facet | Ching-Chuan Chang Huang-Chih Lin Ming-Yuan Lin Te-Hui Tsai |
| author_sort | Ching-Chuan Chang |
| collection | DOAJ |
| description | This study investigated the properties of long bubbles penetrating viscoelastic fluids in a suddenly contracting and expanding tube. Injection gas flow is controlled by a mass flow controller (MFC). Some of dimensionless parameters, such as the capillary number (Ca), the Reynolds number (Re), the fractional ratio (m), and the Weissenberg number (Wi), are discussed herein. The experimental results showed that bubble velocity, Ca, and Wi increase as shear viscosity increases under a constant gas flow by MFC. However, as shear viscosity increases, bubble diameter decreases, and m increases. When gas flow is 200 mL/min and shear viscosity increases, the bubble front is sharper in the contraction tube, and the bubble front shape is blunter in the sudden expansion tube. When gas flow is 600 mL/min and shear viscosity increases, the bubble front is blunter in the contraction tube and exhibits a torch shape in the sudden expansion tube. |
| format | Article |
| id | doaj-art-fa68e191d1c6423aa83b40f85ef60147 |
| institution | DOAJ |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-fa68e191d1c6423aa83b40f85ef601472025-08-20T03:20:04ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422016-01-01201610.1155/2016/67026796702679Long Bubble Penetration through Viscoelastic Fluids in a Suddenly Contracting and Expanding TubeChing-Chuan Chang0Huang-Chih Lin1Ming-Yuan Lin2Te-Hui Tsai3Department of Mechanical Engineering, Army Academy R.O.C., Taoyuan 320, TaiwanDepartment of Aircraft Engineering, Army Academy R.O.C., Taoyuan 320, TaiwanDepartment of Mechanical Engineering, Army Academy R.O.C., Taoyuan 320, TaiwanDepartment of Mechanical Engineering, Army Academy R.O.C., Taoyuan 320, TaiwanThis study investigated the properties of long bubbles penetrating viscoelastic fluids in a suddenly contracting and expanding tube. Injection gas flow is controlled by a mass flow controller (MFC). Some of dimensionless parameters, such as the capillary number (Ca), the Reynolds number (Re), the fractional ratio (m), and the Weissenberg number (Wi), are discussed herein. The experimental results showed that bubble velocity, Ca, and Wi increase as shear viscosity increases under a constant gas flow by MFC. However, as shear viscosity increases, bubble diameter decreases, and m increases. When gas flow is 200 mL/min and shear viscosity increases, the bubble front is sharper in the contraction tube, and the bubble front shape is blunter in the sudden expansion tube. When gas flow is 600 mL/min and shear viscosity increases, the bubble front is blunter in the contraction tube and exhibits a torch shape in the sudden expansion tube.http://dx.doi.org/10.1155/2016/6702679 |
| spellingShingle | Ching-Chuan Chang Huang-Chih Lin Ming-Yuan Lin Te-Hui Tsai Long Bubble Penetration through Viscoelastic Fluids in a Suddenly Contracting and Expanding Tube Advances in Materials Science and Engineering |
| title | Long Bubble Penetration through Viscoelastic Fluids in a Suddenly Contracting and Expanding Tube |
| title_full | Long Bubble Penetration through Viscoelastic Fluids in a Suddenly Contracting and Expanding Tube |
| title_fullStr | Long Bubble Penetration through Viscoelastic Fluids in a Suddenly Contracting and Expanding Tube |
| title_full_unstemmed | Long Bubble Penetration through Viscoelastic Fluids in a Suddenly Contracting and Expanding Tube |
| title_short | Long Bubble Penetration through Viscoelastic Fluids in a Suddenly Contracting and Expanding Tube |
| title_sort | long bubble penetration through viscoelastic fluids in a suddenly contracting and expanding tube |
| url | http://dx.doi.org/10.1155/2016/6702679 |
| work_keys_str_mv | AT chingchuanchang longbubblepenetrationthroughviscoelasticfluidsinasuddenlycontractingandexpandingtube AT huangchihlin longbubblepenetrationthroughviscoelasticfluidsinasuddenlycontractingandexpandingtube AT mingyuanlin longbubblepenetrationthroughviscoelasticfluidsinasuddenlycontractingandexpandingtube AT tehuitsai longbubblepenetrationthroughviscoelasticfluidsinasuddenlycontractingandexpandingtube |