Investigation of spherical and concentric mechanism of compound droplets
Polymer shells with high sphericity and uniform wall thickness are always needed in the inertial confined fusion (ICF) experiments. Driven by the need to control the shape of water-in-oil (W1/O) compound droplets, the effects of the density matching level, the interfacial tension and the rotation sp...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2016-07-01
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| Series: | Matter and Radiation at Extremes |
| Online Access: | http://dx.doi.org/10.1016/j.mre.2016.07.002 |
| _version_ | 1819078070251814912 |
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| author | Meifang Liu Lin Su Jie Li Sufen Chen Yiyang Liu Jing Li Bo Li Yongping Chen Zhanwen Zhang |
| author_facet | Meifang Liu Lin Su Jie Li Sufen Chen Yiyang Liu Jing Li Bo Li Yongping Chen Zhanwen Zhang |
| author_sort | Meifang Liu |
| collection | DOAJ |
| description | Polymer shells with high sphericity and uniform wall thickness are always needed in the inertial confined fusion (ICF) experiments. Driven by the need to control the shape of water-in-oil (W1/O) compound droplets, the effects of the density matching level, the interfacial tension and the rotation speed of the continuing fluid field on the sphericity and wall thickness uniformity of the resulting polymer shells were investigated and the spherical and concentric mechanisms were also discussed. The centering of W1/O compound droplets, the location and movement of W1/O compound droplets in the external phase (W2) were significantly affected by the density matching level of the key stage and the rotation speed of the continuing fluid field. Therefore, by optimizing the density matching level and rotation speed, the batch yield of polystyrene (PS) shells with high sphericity and uniform wall thickness increased. Moreover, the sphericity also increased by raising the oil/water (O/W2) interfacial tension, which drove a droplet to be spherical. The experimental results show that the spherical driving force is from the interfacial tension affected by the two relative phases, while the concentric driving force, as a resultant force, is not only affected by the three phases, but also by the continuing fluid field. The understanding of spherical and concentric mechanism can provide some guidance for preparing polymer shells with high sphericity and uniform wall thickness. |
| first_indexed | 2024-12-21T19:07:15Z |
| format | Article |
| id | doaj.art-5b34d9a910cb4d2295471bc9cb814a6b |
| institution | Directory Open Access Journal |
| issn | 2468-080X |
| language | English |
| last_indexed | 2024-12-21T19:07:15Z |
| publishDate | 2016-07-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | Matter and Radiation at Extremes |
| spelling | doaj.art-5b34d9a910cb4d2295471bc9cb814a6b2022-12-21T18:53:18ZengAIP Publishing LLCMatter and Radiation at Extremes2468-080X2016-07-011421322310.1016/j.mre.2016.07.002005604MREInvestigation of spherical and concentric mechanism of compound dropletsMeifang Liu0Lin Su1Jie Li2Sufen Chen3Yiyang Liu4Jing Li5Bo Li6Yongping Chen7Zhanwen Zhang8Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, ChinaResearch Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, ChinaResearch Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, ChinaResearch Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, ChinaResearch Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, ChinaResearch Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, ChinaResearch Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, ChinaSchool of Energy and Power Engineering, Yangzhou University, Yangzhou, Jiangsu, 225127, ChinaResearch Center of Laser Fusion, China Academy of Engineering Physics, Mianyang, 621900, ChinaPolymer shells with high sphericity and uniform wall thickness are always needed in the inertial confined fusion (ICF) experiments. Driven by the need to control the shape of water-in-oil (W1/O) compound droplets, the effects of the density matching level, the interfacial tension and the rotation speed of the continuing fluid field on the sphericity and wall thickness uniformity of the resulting polymer shells were investigated and the spherical and concentric mechanisms were also discussed. The centering of W1/O compound droplets, the location and movement of W1/O compound droplets in the external phase (W2) were significantly affected by the density matching level of the key stage and the rotation speed of the continuing fluid field. Therefore, by optimizing the density matching level and rotation speed, the batch yield of polystyrene (PS) shells with high sphericity and uniform wall thickness increased. Moreover, the sphericity also increased by raising the oil/water (O/W2) interfacial tension, which drove a droplet to be spherical. The experimental results show that the spherical driving force is from the interfacial tension affected by the two relative phases, while the concentric driving force, as a resultant force, is not only affected by the three phases, but also by the continuing fluid field. The understanding of spherical and concentric mechanism can provide some guidance for preparing polymer shells with high sphericity and uniform wall thickness.http://dx.doi.org/10.1016/j.mre.2016.07.002 |
| spellingShingle | Meifang Liu Lin Su Jie Li Sufen Chen Yiyang Liu Jing Li Bo Li Yongping Chen Zhanwen Zhang Investigation of spherical and concentric mechanism of compound droplets Matter and Radiation at Extremes |
| title | Investigation of spherical and concentric mechanism of compound droplets |
| title_full | Investigation of spherical and concentric mechanism of compound droplets |
| title_fullStr | Investigation of spherical and concentric mechanism of compound droplets |
| title_full_unstemmed | Investigation of spherical and concentric mechanism of compound droplets |
| title_short | Investigation of spherical and concentric mechanism of compound droplets |
| title_sort | investigation of spherical and concentric mechanism of compound droplets |
| url | http://dx.doi.org/10.1016/j.mre.2016.07.002 |
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