The Cavitation Nuclei Transient Characteristics of Lennard-Jones Fluid in Cavitation Inception
In the field of ocean engineering, cavitation is widespread, for the study of cavitation nuclei transient characteristics in cavitation inception, we applied theoretical analysis and molecular dynamics (MD) simulation to study Lennard-Jones (L-J) fluid with different initial cavitation nuclei under...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Sciendo
2018-08-01
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| Series: | Polish Maritime Research |
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| Online Access: | https://doi.org/10.2478/pomr-2018-0077 |
| _version_ | 1818871974414254080 |
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| author | Qiang Fu Benying Zhang Yuanyuan Zhao Rongsheng Zhu Gang Liu Mengyuan Li |
| author_facet | Qiang Fu Benying Zhang Yuanyuan Zhao Rongsheng Zhu Gang Liu Mengyuan Li |
| author_sort | Qiang Fu |
| collection | DOAJ |
| description | In the field of ocean engineering, cavitation is widespread, for the study of cavitation nuclei transient characteristics in cavitation inception, we applied theoretical analysis and molecular dynamics (MD) simulation to study Lennard-Jones (L-J) fluid with different initial cavitation nuclei under the NVT-constant ensemble in this manuscript. The results showed that in cavitation inception, due to the decrease of liquid local pressure, the liquid molecules would enter the cavitation nuclei, which contributed to the growth of cavitation nuclei. By using molecular potential energy, it was found that the molecular potential energy was higher in cavitation nuclei part, while the liquid molecular potential energy changes greatly at the beginning of the cavitation nuclei growth. The density of the liquid and the surface layer changes more obvious, but density of vapor in the bubble changes inconspicuously. With the growth of cavitation nuclei, the RDF peak intensity increased, the peak width narrowed and the first valley moved inner. When cavitation nuclei initial size reduced, the peak intensity reduced, the corresponding rbin increased. With the decrease of the initial cavitation nuclei, the system pressure and total energy achieved a balance longer, and correspondingly, they were smaller. In addition, at the beginning of the cavitation nuclei growth, the total energy and system pressure changed greatly. |
| first_indexed | 2024-12-19T12:31:26Z |
| format | Article |
| id | doaj.art-be9c5be0887f4a1d82f887589ec1adbf |
| institution | Directory Open Access Journal |
| issn | 2083-7429 |
| language | English |
| last_indexed | 2024-12-19T12:31:26Z |
| publishDate | 2018-08-01 |
| publisher | Sciendo |
| record_format | Article |
| series | Polish Maritime Research |
| spelling | doaj.art-be9c5be0887f4a1d82f887589ec1adbf2022-12-21T20:21:23ZengSciendoPolish Maritime Research2083-74292018-08-0125s2758410.2478/pomr-2018-0077pomr-2018-0077The Cavitation Nuclei Transient Characteristics of Lennard-Jones Fluid in Cavitation InceptionQiang Fu0Benying Zhang1Yuanyuan Zhao2Rongsheng Zhu3Gang Liu4Mengyuan Li5National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu, ChinaNational Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu, ChinaNational Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu, ChinaNational Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu, ChinaNational Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu, ChinaNational Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu, ChinaIn the field of ocean engineering, cavitation is widespread, for the study of cavitation nuclei transient characteristics in cavitation inception, we applied theoretical analysis and molecular dynamics (MD) simulation to study Lennard-Jones (L-J) fluid with different initial cavitation nuclei under the NVT-constant ensemble in this manuscript. The results showed that in cavitation inception, due to the decrease of liquid local pressure, the liquid molecules would enter the cavitation nuclei, which contributed to the growth of cavitation nuclei. By using molecular potential energy, it was found that the molecular potential energy was higher in cavitation nuclei part, while the liquid molecular potential energy changes greatly at the beginning of the cavitation nuclei growth. The density of the liquid and the surface layer changes more obvious, but density of vapor in the bubble changes inconspicuously. With the growth of cavitation nuclei, the RDF peak intensity increased, the peak width narrowed and the first valley moved inner. When cavitation nuclei initial size reduced, the peak intensity reduced, the corresponding rbin increased. With the decrease of the initial cavitation nuclei, the system pressure and total energy achieved a balance longer, and correspondingly, they were smaller. In addition, at the beginning of the cavitation nuclei growth, the total energy and system pressure changed greatly.https://doi.org/10.2478/pomr-2018-0077cavitation nucleimolecular dynamics simulationlennard-jones fluidcavitation inceptionnucleation |
| spellingShingle | Qiang Fu Benying Zhang Yuanyuan Zhao Rongsheng Zhu Gang Liu Mengyuan Li The Cavitation Nuclei Transient Characteristics of Lennard-Jones Fluid in Cavitation Inception Polish Maritime Research cavitation nuclei molecular dynamics simulation lennard-jones fluid cavitation inception nucleation |
| title | The Cavitation Nuclei Transient Characteristics of Lennard-Jones Fluid in Cavitation Inception |
| title_full | The Cavitation Nuclei Transient Characteristics of Lennard-Jones Fluid in Cavitation Inception |
| title_fullStr | The Cavitation Nuclei Transient Characteristics of Lennard-Jones Fluid in Cavitation Inception |
| title_full_unstemmed | The Cavitation Nuclei Transient Characteristics of Lennard-Jones Fluid in Cavitation Inception |
| title_short | The Cavitation Nuclei Transient Characteristics of Lennard-Jones Fluid in Cavitation Inception |
| title_sort | cavitation nuclei transient characteristics of lennard jones fluid in cavitation inception |
| topic | cavitation nuclei molecular dynamics simulation lennard-jones fluid cavitation inception nucleation |
| url | https://doi.org/10.2478/pomr-2018-0077 |
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