A Numerical Analysis Research on Earlier Behavior of Molten Droplet Covered with Vapor Film at the Stage of Triggering and Propagation in Steam Explosion
When the molten fuel with high temperature falls into the cavity water, it will be dispersed into droplets which are covered with vapor films due to the rapid heat transfer with phase transition. This situation cannot be simply described by liquid-liquid or gas-liquid systems. And there are no suffi...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | Science and Technology of Nuclear Installations |
| Online Access: | http://dx.doi.org/10.1155/2014/301262 |
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| author | Mingjun Zhong Yankai Li Meng Lin Minghao Yuan Yanhua Yang |
| author_facet | Mingjun Zhong Yankai Li Meng Lin Minghao Yuan Yanhua Yang |
| author_sort | Mingjun Zhong |
| collection | DOAJ |
| description | When the molten fuel with high temperature falls into the cavity water, it will be dispersed into droplets which are covered with vapor films due to the rapid heat transfer with phase transition. This situation cannot be simply described by liquid-liquid or gas-liquid systems. And there are no sufficient experimental studies on the behavior of droplet covered with vapor film because of the rapid reaction and the difficulty in capture of the film configuration. In this paper, a multiphase code with the volume of fluid (VOF) method is used to simulate the earlier behavior of droplet when vapor film exits. The earlier behavior is defined as behavior of the droplet before its disintegration. Thermal effect and pure hydrodynamic effect are, respectively, considered. The simulation results indicate that the film thickness and material density have significant effect on the earlier behavior of droplet. The situation assumed in Ciccarelli and Frost’s model (1994) is observed in current simulation of earlier thermal droplet behavior. The effect of triggering pressure pulse on earlier hydrodynamic behavior is also discussed and it indicates that vapor film has little effect on the hydrodynamic droplet deformation when the intensity of the pressure pulse is very high. |
| format | Article |
| id | doaj-art-24dd544bda1f4c5abead90af73f2a507 |
| institution | Kabale University |
| issn | 1687-6075 1687-6083 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Science and Technology of Nuclear Installations |
| spelling | doaj-art-24dd544bda1f4c5abead90af73f2a5072025-02-03T05:57:09ZengWileyScience and Technology of Nuclear Installations1687-60751687-60832014-01-01201410.1155/2014/301262301262A Numerical Analysis Research on Earlier Behavior of Molten Droplet Covered with Vapor Film at the Stage of Triggering and Propagation in Steam ExplosionMingjun Zhong0Yankai Li1Meng Lin2Minghao Yuan3Yanhua Yang4School of Nuclear Science and Engineering, Shanghai Jiaotong University, No. 800 Dongchuan Road, Shanghai 200240, ChinaSchool of Nuclear Science and Engineering, Shanghai Jiaotong University, No. 800 Dongchuan Road, Shanghai 200240, ChinaSchool of Nuclear Science and Engineering, Shanghai Jiaotong University, No. 800 Dongchuan Road, Shanghai 200240, ChinaSchool of Nuclear Science and Engineering, Shanghai Jiaotong University, No. 800 Dongchuan Road, Shanghai 200240, ChinaSchool of Nuclear Science and Engineering, Shanghai Jiaotong University, No. 800 Dongchuan Road, Shanghai 200240, ChinaWhen the molten fuel with high temperature falls into the cavity water, it will be dispersed into droplets which are covered with vapor films due to the rapid heat transfer with phase transition. This situation cannot be simply described by liquid-liquid or gas-liquid systems. And there are no sufficient experimental studies on the behavior of droplet covered with vapor film because of the rapid reaction and the difficulty in capture of the film configuration. In this paper, a multiphase code with the volume of fluid (VOF) method is used to simulate the earlier behavior of droplet when vapor film exits. The earlier behavior is defined as behavior of the droplet before its disintegration. Thermal effect and pure hydrodynamic effect are, respectively, considered. The simulation results indicate that the film thickness and material density have significant effect on the earlier behavior of droplet. The situation assumed in Ciccarelli and Frost’s model (1994) is observed in current simulation of earlier thermal droplet behavior. The effect of triggering pressure pulse on earlier hydrodynamic behavior is also discussed and it indicates that vapor film has little effect on the hydrodynamic droplet deformation when the intensity of the pressure pulse is very high.http://dx.doi.org/10.1155/2014/301262 |
| spellingShingle | Mingjun Zhong Yankai Li Meng Lin Minghao Yuan Yanhua Yang A Numerical Analysis Research on Earlier Behavior of Molten Droplet Covered with Vapor Film at the Stage of Triggering and Propagation in Steam Explosion Science and Technology of Nuclear Installations |
| title | A Numerical Analysis Research on Earlier Behavior of Molten Droplet Covered with Vapor Film at the Stage of Triggering and Propagation in Steam Explosion |
| title_full | A Numerical Analysis Research on Earlier Behavior of Molten Droplet Covered with Vapor Film at the Stage of Triggering and Propagation in Steam Explosion |
| title_fullStr | A Numerical Analysis Research on Earlier Behavior of Molten Droplet Covered with Vapor Film at the Stage of Triggering and Propagation in Steam Explosion |
| title_full_unstemmed | A Numerical Analysis Research on Earlier Behavior of Molten Droplet Covered with Vapor Film at the Stage of Triggering and Propagation in Steam Explosion |
| title_short | A Numerical Analysis Research on Earlier Behavior of Molten Droplet Covered with Vapor Film at the Stage of Triggering and Propagation in Steam Explosion |
| title_sort | numerical analysis research on earlier behavior of molten droplet covered with vapor film at the stage of triggering and propagation in steam explosion |
| url | http://dx.doi.org/10.1155/2014/301262 |
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