The cavitation nuclei transient characteristics of Lennard-Jones fluid in cavitation inception

• Autorzy: Fu Q. , Zhang B. , Zhao Y. , Zhu R. , Liu G. , Li M.

Identyfikatory

DOI

10.2478/pomr-2018-0077

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

cavitation nuclei; molecular dynamics simulation; Lennard-Jones fluid; cavitation inception; nucleation

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2018
• Tom: S 2
• Strony: 75--84
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Fu Q.

• National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu, China

autor

Zhang B.

• National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu, China

autor

Zhao Y.

• National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu, China

autor

Zhu R.

• National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu, China

autor

Liu G.

• National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu, China

autor

Li M.

• National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu, China

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).