Heat transfer and its effect on growth behaviors of crystal layers during static layer melt crystallization
| Autor: | Qiuxiang Yin, Yuyuan Dong, Suping Ding, Ting Wang, Hongxun Hao, Yunhe Bai, Xin Huang |
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| Rok vydání: | 2021 |
| Předmět: |
Natural convection
Materials science Applied Mathematics General Chemical Engineering Nucleation Physics::Optics Thermodynamics 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Thermal conduction Industrial and Manufacturing Engineering law.invention Crystal Thermal conductivity 020401 chemical engineering law Condensed Matter::Superconductivity Latent heat Heat transfer 0204 chemical engineering Crystallization 0210 nano-technology |
| Zdroj: | Chemical Engineering Science. 233:116390 |
| ISSN: | 0009-2509 |
| Popis: | The growth behaviors of crystal layers during static layer melt crystallization was studied from the perspectives of morphology structure, growth rates and temperature evolution. The temperature distributions of the melt and crystal layer were deduced. With these results, the heat transfer during crystallization was analyzed by considering the relative influences of natural convection, heat conduction in the melt and latent heat of crystallization. A model correlating growth rate with physical and experimental parameters was derived based on energy conservation. Effective thermal conductivity of crystal layers was evaluated. It was confirmed that the structure and density of the crystal layer can significantly affect the thermal conductivity. According to the temperature curves of melt, the static layer melt crystallization process in a tubular crystallizer can be divided into four stages as nucleation stage, fast growth stage, slow growth stage and steady state stage. |
| Databáze: | OpenAIRE |
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