Numerical Simulation of Flow and Mass Transfer Undergoing 2D Circular Translation for ADP Single Crystals Growth
LIU Hang1, LI Mingwei1, WANG Pengfei1, HU Zhitao2, YIN Huawei3
1 Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China 2 School of Mechanical Engineering, University of South China, Hengyang 421001, China 3 School of Environmental and Chemical Engineering, Chongqing Three Gorges University, Chongqing 404000, China
Abstract: This paper proposed a new growth method for ammonium dihydrogen phosphate (NH4H2PO4, ADP) crystal, namely, 2D Circular Translation (2D CT). Numerical simulations had been performed on the rotating-crystal method and 2D CT by the finite volume method and dyna-mic mesh technology during the ADP single crystals growth. The distribution of time-averaged supersaturation and its standard deviation under the two methods were compared. The effects of different characteristic rotation ω, different orbit radius R and different crystal size A on the distribution of time-averaged supersaturation and its standard deviation were analyzed. The results indicate that comparing with the rotating crystal met-hod, the 2D CT has advantages in terms of the surface supersaturation and its distribution homogeneity. With the increase of the characteristic rotation ω and the orbit radius R, the time-averaged supersaturation on the crystal faces increases and its homogeneity becomes better, which is beneficial to the stability of the surface morphology. However, as the size A gets larger, the time-averaged supersaturation decreases and its uniformity becomes worse. As a consequence, it is necessary to increase the characteristic rotation ω or the orbit radius R during the crystal growth.
刘杭, 李明伟, 王鹏飞, 胡志涛, 尹华伟. 二维圆周平动法ADP单晶生长流动与传质数值模拟[J]. 材料导报, 2020, 34(20): 20022-20027.
LIU Hang, LI Mingwei, WANG Pengfei, HU Zhitao, YIN Huawei. Numerical Simulation of Flow and Mass Transfer Undergoing 2D Circular Translation for ADP Single Crystals Growth. Materials Reports, 2020, 34(20): 20022-20027.
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2020, Vol. 34 
