Study on the Instability of Two-Phase Flow in the Heat-Absorbing Tube of Trough Solar Collector
The Marangoni effect and Rayleigh-Benard effect in the two-phase region of solar trough heat-absorbing tube are simulated by FTM (front tracking method). Considering the Marangoni effect alone, although surface tension gradient and surface tension affect the interface wave, the two effects have diff...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2017-01-01
|
| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/2017/6547203 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832567633945296896 |
|---|---|
| author | Ying Zhang Peiyao Liu Peisheng Li Yue Chen Yanni Pan |
| author_facet | Ying Zhang Peiyao Liu Peisheng Li Yue Chen Yanni Pan |
| author_sort | Ying Zhang |
| collection | DOAJ |
| description | The Marangoni effect and Rayleigh-Benard effect in the two-phase region of solar trough heat-absorbing tube are simulated by FTM (front tracking method). Considering the Marangoni effect alone, although surface tension gradient and surface tension affect the interface wave, the two effects have different characteristics. The surface tension gradient caused by the temperature gradient is one of the factors that swing the interface. The amplitude attenuation of the interface wave decreases with the increase of the Marangoni number (Ma). In general, the surface tension gradient enhances the convection opposite to the temperature gradient. Under the gravity field, the Rayleigh-Benard effect influences the development of the vortex structure in the flow field, which in turn affects the velocity gradient near the interface to influence the evolution of the interface fluctuation. In a small Rayleigh number (Ra), the buoyancy convection reduces the velocity gradient, thus suppressing the evolution of the interfacial wave. In the range of Ra < 4.0E4, the larger the Ra, the stronger the inhibitory effect. However, when the Ra number is large (Ra > 4.0E4), the situation is just the opposite. The larger the Ra is, the stronger the promoting effect is. |
| format | Article |
| id | doaj-art-19944287d0064acbb6a44064a2f1ba33 |
| institution | Kabale University |
| issn | 1110-662X 1687-529X |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-19944287d0064acbb6a44064a2f1ba332025-02-03T01:00:56ZengWileyInternational Journal of Photoenergy1110-662X1687-529X2017-01-01201710.1155/2017/65472036547203Study on the Instability of Two-Phase Flow in the Heat-Absorbing Tube of Trough Solar CollectorYing Zhang0Peiyao Liu1Peisheng Li2Yue Chen3Yanni Pan4School of Mechanical and Electrical Engineering, Nanchang University, Nanchang, Jiangxi 330031, ChinaSchool of Mechanical and Electrical Engineering, Nanchang University, Nanchang, Jiangxi 330031, ChinaSchool of Mechanical and Electrical Engineering, Nanchang University, Nanchang, Jiangxi 330031, ChinaSchool of Mechanical and Electrical Engineering, Nanchang University, Nanchang, Jiangxi 330031, ChinaSchool of Mechanical and Electrical Engineering, Nanchang University, Nanchang, Jiangxi 330031, ChinaThe Marangoni effect and Rayleigh-Benard effect in the two-phase region of solar trough heat-absorbing tube are simulated by FTM (front tracking method). Considering the Marangoni effect alone, although surface tension gradient and surface tension affect the interface wave, the two effects have different characteristics. The surface tension gradient caused by the temperature gradient is one of the factors that swing the interface. The amplitude attenuation of the interface wave decreases with the increase of the Marangoni number (Ma). In general, the surface tension gradient enhances the convection opposite to the temperature gradient. Under the gravity field, the Rayleigh-Benard effect influences the development of the vortex structure in the flow field, which in turn affects the velocity gradient near the interface to influence the evolution of the interface fluctuation. In a small Rayleigh number (Ra), the buoyancy convection reduces the velocity gradient, thus suppressing the evolution of the interfacial wave. In the range of Ra < 4.0E4, the larger the Ra, the stronger the inhibitory effect. However, when the Ra number is large (Ra > 4.0E4), the situation is just the opposite. The larger the Ra is, the stronger the promoting effect is.http://dx.doi.org/10.1155/2017/6547203 |
| spellingShingle | Ying Zhang Peiyao Liu Peisheng Li Yue Chen Yanni Pan Study on the Instability of Two-Phase Flow in the Heat-Absorbing Tube of Trough Solar Collector International Journal of Photoenergy |
| title | Study on the Instability of Two-Phase Flow in the Heat-Absorbing Tube of Trough Solar Collector |
| title_full | Study on the Instability of Two-Phase Flow in the Heat-Absorbing Tube of Trough Solar Collector |
| title_fullStr | Study on the Instability of Two-Phase Flow in the Heat-Absorbing Tube of Trough Solar Collector |
| title_full_unstemmed | Study on the Instability of Two-Phase Flow in the Heat-Absorbing Tube of Trough Solar Collector |
| title_short | Study on the Instability of Two-Phase Flow in the Heat-Absorbing Tube of Trough Solar Collector |
| title_sort | study on the instability of two phase flow in the heat absorbing tube of trough solar collector |
| url | http://dx.doi.org/10.1155/2017/6547203 |
| work_keys_str_mv | AT yingzhang studyontheinstabilityoftwophaseflowintheheatabsorbingtubeoftroughsolarcollector AT peiyaoliu studyontheinstabilityoftwophaseflowintheheatabsorbingtubeoftroughsolarcollector AT peishengli studyontheinstabilityoftwophaseflowintheheatabsorbingtubeoftroughsolarcollector AT yuechen studyontheinstabilityoftwophaseflowintheheatabsorbingtubeoftroughsolarcollector AT yannipan studyontheinstabilityoftwophaseflowintheheatabsorbingtubeoftroughsolarcollector |