Thermodynamic effect of single bubble near a rigid wall
The objective of this paper is to numerically investigate the thermodynamic effect during bubble collapse near a rigid boundary. A compressible fluid model is introduced to accurately capture the transient process of bubble shapes and temperature, as well as corresponding pressure, and velocity. The...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2021-03-01
|
| Series: | Ultrasonics Sonochemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1350417720317004 |
| _version_ | 1819146806908420096 |
|---|---|
| author | Qidong Yu Xiaojian Ma Zhicheng Xu Jing Zhao Dapeng Wang Zhenwei Huang |
| author_facet | Qidong Yu Xiaojian Ma Zhicheng Xu Jing Zhao Dapeng Wang Zhenwei Huang |
| author_sort | Qidong Yu |
| collection | DOAJ |
| description | The objective of this paper is to numerically investigate the thermodynamic effect during bubble collapse near a rigid boundary. A compressible fluid model is introduced to accurately capture the transient process of bubble shapes and temperature, as well as corresponding pressure, and velocity. The accuracy of the numerical model is verified by the experimental data of bubble shapes, and Keller-Kolodner equation as well as its thermodynamic equation. The results show that a bubble near the rigid boundary presents high-speed jet in collapse stage and counter jet in rebound stage, respectively. In the collapse stage, the bubble margin will shrink rapidly and do the positive work on the compressible vapor inside the bubble, then a significant amount of heat will be generated, and finally the generation of high-speed jet drives the low-temperature liquid outside the bubble to occupy the position of high-temperature vapor inside the bubble. In the rebound stage, the counter jet moving away from the rigid boundary takes part of heat away from the sub-bubble, which avoids the external work of the expansion of the sub-bubble and the temperature reduction caused by the dissipation effect of the vortex structure. In addition, the initial standoff has a significant effect on the thermodynamics of bubble oscillation. The temperature keeps increasing with the increase of the initial standoff in the collapse stage, while it shows a downward trend with the increase of the initial standoff in the rebound stage. That’s because the high-speed jet and counter jet of bubble gradually disappear when the initial standoff increases, which is the important reason for the opposite evolution trend of temperature in collapse and rebound stage. |
| first_indexed | 2024-12-22T13:19:47Z |
| format | Article |
| id | doaj.art-0bd0660b3ea74de28eda979c83e84a4f |
| institution | Directory Open Access Journal |
| issn | 1350-4177 |
| language | English |
| last_indexed | 2024-12-22T13:19:47Z |
| publishDate | 2021-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ultrasonics Sonochemistry |
| spelling | doaj.art-0bd0660b3ea74de28eda979c83e84a4f2022-12-21T18:24:30ZengElsevierUltrasonics Sonochemistry1350-41772021-03-0171105396Thermodynamic effect of single bubble near a rigid wallQidong Yu0Xiaojian Ma1Zhicheng Xu2Jing Zhao3Dapeng Wang4Zhenwei Huang5Department of Research and Development, China Academy of Launch Vehicle Technology, Beijing 100076, ChinaDepartment of Research and Development, China Academy of Launch Vehicle Technology, Beijing 100076, China; Corresponding authors.Department of Research and Development, China Academy of Launch Vehicle Technology, Beijing 100076, ChinaDepartment of Research and Development, China Academy of Launch Vehicle Technology, Beijing 100076, ChinaDepartment of Research and Development, China Academy of Launch Vehicle Technology, Beijing 100076, ChinaState Key Laboratory of Hydroscience and Engineering, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China; Corresponding authors.The objective of this paper is to numerically investigate the thermodynamic effect during bubble collapse near a rigid boundary. A compressible fluid model is introduced to accurately capture the transient process of bubble shapes and temperature, as well as corresponding pressure, and velocity. The accuracy of the numerical model is verified by the experimental data of bubble shapes, and Keller-Kolodner equation as well as its thermodynamic equation. The results show that a bubble near the rigid boundary presents high-speed jet in collapse stage and counter jet in rebound stage, respectively. In the collapse stage, the bubble margin will shrink rapidly and do the positive work on the compressible vapor inside the bubble, then a significant amount of heat will be generated, and finally the generation of high-speed jet drives the low-temperature liquid outside the bubble to occupy the position of high-temperature vapor inside the bubble. In the rebound stage, the counter jet moving away from the rigid boundary takes part of heat away from the sub-bubble, which avoids the external work of the expansion of the sub-bubble and the temperature reduction caused by the dissipation effect of the vortex structure. In addition, the initial standoff has a significant effect on the thermodynamics of bubble oscillation. The temperature keeps increasing with the increase of the initial standoff in the collapse stage, while it shows a downward trend with the increase of the initial standoff in the rebound stage. That’s because the high-speed jet and counter jet of bubble gradually disappear when the initial standoff increases, which is the important reason for the opposite evolution trend of temperature in collapse and rebound stage.http://www.sciencedirect.com/science/article/pii/S1350417720317004Bubble oscillationThermodynamic effectTemperatureHigh-speed jetCounter jet |
| spellingShingle | Qidong Yu Xiaojian Ma Zhicheng Xu Jing Zhao Dapeng Wang Zhenwei Huang Thermodynamic effect of single bubble near a rigid wall Ultrasonics Sonochemistry Bubble oscillation Thermodynamic effect Temperature High-speed jet Counter jet |
| title | Thermodynamic effect of single bubble near a rigid wall |
| title_full | Thermodynamic effect of single bubble near a rigid wall |
| title_fullStr | Thermodynamic effect of single bubble near a rigid wall |
| title_full_unstemmed | Thermodynamic effect of single bubble near a rigid wall |
| title_short | Thermodynamic effect of single bubble near a rigid wall |
| title_sort | thermodynamic effect of single bubble near a rigid wall |
| topic | Bubble oscillation Thermodynamic effect Temperature High-speed jet Counter jet |
| url | http://www.sciencedirect.com/science/article/pii/S1350417720317004 |
| work_keys_str_mv | AT qidongyu thermodynamiceffectofsinglebubbleneararigidwall AT xiaojianma thermodynamiceffectofsinglebubbleneararigidwall AT zhichengxu thermodynamiceffectofsinglebubbleneararigidwall AT jingzhao thermodynamiceffectofsinglebubbleneararigidwall AT dapengwang thermodynamiceffectofsinglebubbleneararigidwall AT zhenweihuang thermodynamiceffectofsinglebubbleneararigidwall |