Numerical Simulation of Hydrothermal Autoclave for Single-Crystal Growth Process
Numerical simulation of the hydrothermal process for growing two-inch bulk single crystals of ZnO has been done. The autoclave is assumed to be axisymmetric. The heat transfer by natural convection is discussed for flat and funnel-shaped baffles. The funnel-shaped baffle leads to a significant incre...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2008-12-01
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| Series: | Journal of Thermal Science and Technology |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jtst/3/3/3_3_540/_pdf/-char/en |
| _version_ | 1818283293345316864 |
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| author | Yoshio MASUDA Akira SUZUKI Yutaka MIKAWA Valery CHANI Chiaki YOKOYAMA Takao TSUKADA |
| author_facet | Yoshio MASUDA Akira SUZUKI Yutaka MIKAWA Valery CHANI Chiaki YOKOYAMA Takao TSUKADA |
| author_sort | Yoshio MASUDA |
| collection | DOAJ |
| description | Numerical simulation of the hydrothermal process for growing two-inch bulk single crystals of ZnO has been done. The autoclave is assumed to be axisymmetric. The heat transfer by natural convection is discussed for flat and funnel-shaped baffles. The funnel-shaped baffle leads to a significant increase in the flow rate between the raw material zone and the crystal growth zone. However, the temperature difference between the two zones does not become very small. Therefore, the funnel-shaped baffle is effective in the hydrothermal crystal growth process from the viewpoint of transport phenomena. The calculations show that the optimum baffle angle about 20°. Similar results are obtained when the raw material is considered as a porous medium. |
| first_indexed | 2024-12-13T00:34:36Z |
| format | Article |
| id | doaj.art-742ea704a7ad43db88ae1d032ab06baa |
| institution | Directory Open Access Journal |
| issn | 1880-5566 |
| language | English |
| last_indexed | 2024-12-13T00:34:36Z |
| publishDate | 2008-12-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Thermal Science and Technology |
| spelling | doaj.art-742ea704a7ad43db88ae1d032ab06baa2022-12-22T00:05:15ZengThe Japan Society of Mechanical EngineersJournal of Thermal Science and Technology1880-55662008-12-013354055110.1299/jtst.3.540jtstNumerical Simulation of Hydrothermal Autoclave for Single-Crystal Growth ProcessYoshio MASUDA0Akira SUZUKI1Yutaka MIKAWA2Valery CHANI3Chiaki YOKOYAMA4Takao TSUKADA5AISTAISTFukuda Crystal LaboratoryInstitute of Multidisciplinary Research for Advanced Materials, Tohoku Univ.Institute of Multidisciplinary Research for Advanced Materials, Tohoku Univ.Osaka Prefecture Univ.Numerical simulation of the hydrothermal process for growing two-inch bulk single crystals of ZnO has been done. The autoclave is assumed to be axisymmetric. The heat transfer by natural convection is discussed for flat and funnel-shaped baffles. The funnel-shaped baffle leads to a significant increase in the flow rate between the raw material zone and the crystal growth zone. However, the temperature difference between the two zones does not become very small. Therefore, the funnel-shaped baffle is effective in the hydrothermal crystal growth process from the viewpoint of transport phenomena. The calculations show that the optimum baffle angle about 20°. Similar results are obtained when the raw material is considered as a porous medium.https://www.jstage.jst.go.jp/article/jtst/3/3/3_3_540/_pdf/-char/enhydrothermalcrystal growthnumerical simulationnatural convectionbaffle |
| spellingShingle | Yoshio MASUDA Akira SUZUKI Yutaka MIKAWA Valery CHANI Chiaki YOKOYAMA Takao TSUKADA Numerical Simulation of Hydrothermal Autoclave for Single-Crystal Growth Process Journal of Thermal Science and Technology hydrothermal crystal growth numerical simulation natural convection baffle |
| title | Numerical Simulation of Hydrothermal Autoclave for Single-Crystal Growth Process |
| title_full | Numerical Simulation of Hydrothermal Autoclave for Single-Crystal Growth Process |
| title_fullStr | Numerical Simulation of Hydrothermal Autoclave for Single-Crystal Growth Process |
| title_full_unstemmed | Numerical Simulation of Hydrothermal Autoclave for Single-Crystal Growth Process |
| title_short | Numerical Simulation of Hydrothermal Autoclave for Single-Crystal Growth Process |
| title_sort | numerical simulation of hydrothermal autoclave for single crystal growth process |
| topic | hydrothermal crystal growth numerical simulation natural convection baffle |
| url | https://www.jstage.jst.go.jp/article/jtst/3/3/3_3_540/_pdf/-char/en |
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