Study on the Inverted Temperature Profile Based on Non-Equilibrium Molecular Dynamics(Thermal Engineering)
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- TOKUNAGA Atsushi
- Department of Mechanical Engineering, Kyushu Institute of Technology
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- NAGAYAMA Gyoko
- 九州工業大学大学院工学研究院機械知能工学研究系
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- TSURUTA Takaharu
- 九州工業大学大学院工学研究院機械知能工学研究系
Bibliographic Information
- Other Title
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- 逆温度こう配現象の非平衡分子動力学解析(熱工学,内燃機関,動力など)
- 逆温度こう配現象の非平衡分子動力学解析
- ギャクオンド コウバイ ゲンショウ ノ ヒヘイコウ ブンシ ドウリキガク カイセキ
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Abstract
Problem of the inverted temperature profile in condensation has been discussed at length in kinetic theory. The possible occurrence of the inverted temperature profile raised serious doubts about the validity of the previous theory, because the result seemed physically unreasonable. In this study, non-equilibrium molecular dynamics (NEMD) simulation with two facing surfaces of evaporation and condensation is carried out in order to obtain further evidence for the occurrence of the inverted temperature profile. Heat and mass transfer rates across the liquid-vapor interface during the condensation of argon are calculated for different non-equilibrium conditions given by changing the temperature of evaporating surface. From a view point of irreversible thermodynamics, the criteria for the inverted temperature profile are examined with the NEMD data and we have a conclusion that the inverted temperature profile may occur without contradiction to the second law of thermodynamics. In addition, we found that the molecular reflection at the condensing surface has an important role in the inverted temperature phenomenon. The reflected molecules do not accommodate with the condensing surface so that those molecules raise the temperature in the vicinity of the condensing surface under the non-equilibrium conditions.
Journal
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- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
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TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 76 (771), 1901-1907, 2010
The Japan Society of Mechanical Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390001206294308992
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- NII Article ID
- 110007989263
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- NII Book ID
- AN00187441
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- ISSN
- 18848346
- 03875016
- http://id.crossref.org/issn/03875016
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- HANDLE
- 10228/5427
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- NDL BIB ID
- 10916525
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed