Experimental Investigation of NH<sub>4</sub>Cl-H<sub>2</sub>O Eutectic Solution Solidification for Simulating Crystal Growth with Bridgman Method

李恒; 白博峰; 苏燕兵; 张磊; 郭烈锦

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Experimental Investigation of NH₄Cl-H₂O Eutectic Solution Solidification for Simulating Crystal Growth with Bridgman Method

更新时间：2025-12-08

- Experimental Investigation of NH₄Cl-H₂O Eutectic Solution Solidification for Simulating Crystal Growth with Bridgman Method
- Vol. 41, Issue 11, Pages: 1298-1302(2007)
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK12
- Online First：10 November 2007，
  
  Published：2007
- 稿件说明：
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李恒, 白博峰, 苏燕兵, et al. Experimental Investigation of NH₄Cl-H₂O Eutectic Solution Solidification for Simulating Crystal Growth with Bridgman Method[J]. 2007, 41(11): 1298-1302.
DOI：

李恒, 白博峰, 苏燕兵, et al. Experimental Investigation of NH₄Cl-H₂O Eutectic Solution Solidification for Simulating Crystal Growth with Bridgman Method[J]. 2007, 41(11): 1298-1302. DOI：

摘要

利用NH

Cl-H

O溶液的共晶凝固模拟Bridgman法晶体生长过程

通过粒子图像测速系统测量了矩形腔和圆柱腔内NH

Cl-H

O溶液共晶凝固过程中的流场

结合温度变化得到了凝固过程中流动和温度的耦合规律.实验结果表明:在侧壁和底部冷却条件下

两种腔室内溶液共晶凝固过程中流场的变化基本相似

形成竖壁面附近溶液向下流动、中心区域溶液向上流动的对流涡; 凝固开始后

热交换和潜热的释放使液相区内温度下降趋于平缓; 圆柱腔内出现了角区绕流和二次对流涡现象.实验得到的流动和温度变化规律为理论建模及数值计算提供了有用的实验数据.

Abstract

The crystal growth process with Bridgman method was simulated via NH

Cl-H

O solution eutectic solidification. The flow fields of NH

Cl-H

O solution during solidification in both rectangular cavity and cylindrical cavity were measured with particle image velocimetry(PIV). With the temperature varying

the coupling rules of fluid flow and temperature during eutectic solidification process were observed. Cooling both at sidewall and bottom

the evolution of flow field was about the same in the two kinds of cavities during the solidification process. Convection vortex occurred in the liquid region flowing downward along the vertical sidewalls

and upward in the center region. Heat transfer and latent heat release made the temperature decrease slowly. The rule between flow field and temperature during the eutectic solidification approached the crystal growth process of Bridgman method

and offered valuable data for theoretical modeling and numerical calculation.

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Keywords

references

Kaneko K, Koyaguchi T. Solidification of an aqueous ammonium chloride solution in rectangular cavity, I: experimental study [J]. Int Journal of Heat and Mass Transfer, 1989, 32(1): 47-68.

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Related Institution

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DOI：

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Abstract

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references

Experimental Investigation of NH₄Cl-H₂O Eutectic Solution Solidification for Simulating Crystal Growth with Bridgman Method