Initial Stage of Nucleate Boiling: Molecular Dynamics Investigation
We investigated the initial stage of nucleate boiling on ideally smooth surface with a molecular dynamics simulation technique. Lennard-Jones (LJ) model liquid was confined in a rectangular simulation cell, contacting with a flat smooth solid wall. The wall consists of fcc crystal of LJ-like particl...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
The Japan Society of Mechanical Engineers
2012-07-01
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| Series: | Journal of Thermal Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jtst/7/1/7_334/_pdf/-char/en |
| _version_ | 1818315255225253888 |
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| author | Takahiro YAMAMOTO Mitsuhiro MATSUMOTO |
| author_facet | Takahiro YAMAMOTO Mitsuhiro MATSUMOTO |
| author_sort | Takahiro YAMAMOTO |
| collection | DOAJ |
| description | We investigated the initial stage of nucleate boiling on ideally smooth surface with a molecular dynamics simulation technique. Lennard-Jones (LJ) model liquid was confined in a rectangular simulation cell, contacting with a flat smooth solid wall. The wall consists of fcc crystal of LJ-like particles. After the system was thermally equilibrated, the temperature of wall particles was raised to transfer thermal energy to the liquid. We examined two cases, the overall heating where the surface temperature is kept constant all over the area, and the partial (spot) heating where two regions of heating and cooling are placed. In both cases, when the liquid in the vicinity of the heating surface obtains sufficient energy, it thermally expands and its pressure decreases, leading to formation of bubble nuclei of atomic size. The inception time of nucleation was found to be affected by surface wettability as well as the surface temperature. When the surface is hydrophobic and the heating area is small, size oscillation of the generated bubbles was observed. |
| first_indexed | 2024-12-13T09:02:38Z |
| format | Article |
| id | doaj.art-0af6fa24b2b3463789e9894e747206c2 |
| institution | Directory Open Access Journal |
| issn | 1880-5566 |
| language | English |
| last_indexed | 2024-12-13T09:02:38Z |
| publishDate | 2012-07-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Thermal Science and Technology |
| spelling | doaj.art-0af6fa24b2b3463789e9894e747206c22022-12-21T23:53:08ZengThe Japan Society of Mechanical EngineersJournal of Thermal Science and Technology1880-55662012-07-017133434910.1299/jtst.7.334jtstInitial Stage of Nucleate Boiling: Molecular Dynamics InvestigationTakahiro YAMAMOTO0Mitsuhiro MATSUMOTO1Department of Mechanical Engineering and Science, Kyoto UniversityDepartment of Mechanical Engineering and Science, Kyoto UniversityWe investigated the initial stage of nucleate boiling on ideally smooth surface with a molecular dynamics simulation technique. Lennard-Jones (LJ) model liquid was confined in a rectangular simulation cell, contacting with a flat smooth solid wall. The wall consists of fcc crystal of LJ-like particles. After the system was thermally equilibrated, the temperature of wall particles was raised to transfer thermal energy to the liquid. We examined two cases, the overall heating where the surface temperature is kept constant all over the area, and the partial (spot) heating where two regions of heating and cooling are placed. In both cases, when the liquid in the vicinity of the heating surface obtains sufficient energy, it thermally expands and its pressure decreases, leading to formation of bubble nuclei of atomic size. The inception time of nucleation was found to be affected by surface wettability as well as the surface temperature. When the surface is hydrophobic and the heating area is small, size oscillation of the generated bubbles was observed.https://www.jstage.jst.go.jp/article/jtst/7/1/7_334/_pdf/-char/ennucleate boilingnonequilibrium molecular dynamics simulationwettabilitymicrobubblesyoung-laplace equation |
| spellingShingle | Takahiro YAMAMOTO Mitsuhiro MATSUMOTO Initial Stage of Nucleate Boiling: Molecular Dynamics Investigation Journal of Thermal Science and Technology nucleate boiling nonequilibrium molecular dynamics simulation wettability microbubbles young-laplace equation |
| title | Initial Stage of Nucleate Boiling: Molecular Dynamics Investigation |
| title_full | Initial Stage of Nucleate Boiling: Molecular Dynamics Investigation |
| title_fullStr | Initial Stage of Nucleate Boiling: Molecular Dynamics Investigation |
| title_full_unstemmed | Initial Stage of Nucleate Boiling: Molecular Dynamics Investigation |
| title_short | Initial Stage of Nucleate Boiling: Molecular Dynamics Investigation |
| title_sort | initial stage of nucleate boiling molecular dynamics investigation |
| topic | nucleate boiling nonequilibrium molecular dynamics simulation wettability microbubbles young-laplace equation |
| url | https://www.jstage.jst.go.jp/article/jtst/7/1/7_334/_pdf/-char/en |
| work_keys_str_mv | AT takahiroyamamoto initialstageofnucleateboilingmoleculardynamicsinvestigation AT mitsuhiromatsumoto initialstageofnucleateboilingmoleculardynamicsinvestigation |