| COMPUTATIONAL SIMULATION |
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| Numerical Analysis of Flow and Mass Transfer for KDP Crystals Undergoing Two Different Motion Modes During Growth |
| ZHOU Chuan1,2, LI Mingwei1, YIN Huawei1, CUI Qidong1, HU Zhitao1
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1 Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400030;
2 SPIC Yuanda EP Science & Technology Branch, Chongqing 401122; |
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Abstract Numerical simulations were conducted to model the flow and mass transfer involved in KDP crystals growth via two different motion modes. The features of solution flow around the crystal and the corresponding surface supersaturation distribution of two motion modes were compared and discussed. The effects of crystal size on surface supersaturation fields were analyzed. Simulated results indicated that when the 2D motion method (2D MM) was employed, the crystal surface experience complicate hydrodynamic conditions and its distribution of surface supersaturation was not as regular as that in rotating-crystal method. Additionally, its magnitude of pyramidal face was distinctly larger than that in rotating-crystal method. A considerable fluctuation occurred in surface supersaturation for a cycle in rotating-crystal method. By contrast, the variation of surface supersaturation in unit cycle was small as the crystal was grown by 2D MM. The gradient magnitude of surface supersaturation in 2D MM was less than that in rotating-crystal method for the smaller crystal, but it was larger than rotating-crystal method under the larger crystal.
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Published: 25 January 2017
Online: 2018-05-02
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1 Wilcox W R. Influence of convection on the growth of crystals from solution [J]. J Crystal Growth,1983,65:133.
2 Woods B W, Runkel M J, Yan M, et al. Investigations of laser damage in KDP using light-scattering techniques [J]. SPIE,1997,2966:20.
3 Woods B W, Yan M, DeYoreo J J, et al. Photothermal mapping of defects in the study of bulk damage in KDP [J]. SPIE,1998,3244:242.
4 Janssen-Van R R, Bennema P. The role of hydrodynamics and supersaturation in the formation of liquid inclusions in KDP [J]. J Crystal Growth,1977,42:224.
5 Janssen-Van R R, Linden W H, Dobbinga E, et al. The influence of the hydrodynamic environment on the growth and the formation of liquid inclusions in large potassium dihydrogen phosphate (KDP) crystals [J]. Kristall Technik,1978,13(1):17.
6 van Enckevort W J P, Janssen-Van R R, Klapper H, et al. Growth phenomena of KDP crystals in relation to the internal structure [J]. J Crystal Growth,1982,60(1):67.
7 Chernov A A, Kuznetsov Y G, Smol'sky I L, et al. Hydrodynamic effects in growth of adp crystals from aqueous solutions in the kine-tics regime [J]. Sov Phys Crystallography,1986,31(6):705.
8 Booth N A, Chernov A A, Vekilov P G. Characteristic lengthscales of step bunching in KDP crystal growth: In situ differential phase-shifting interferometry study [J].J Crystal Growth,2002,237-239:1818.
9 Vekilov P G, Alexander J I D, Rosenberger F. Nonlinear response of layer growth dynamics in the mixed kinetics-bulk-transport regime [J]. Phys Rev E,1996,54(6):6650.
10 Chernov A A.How does the flow within the boundary layer influen-ce morphological stability of a vicinal face? [J]. J Crystal Growth,1992,118(3-4):333.
11 Chernov A A, Coriell S R, Murray B T. Morphological stability of a vicinal face induced by step flow [J]. J Crystal Growth,1993,132(3-4):405.
12 Coriell S R, Murray B T, Chernov A A, et al. Step bunching on a vicinal face of a crystal growing in a flowing solution [J]. J Crystal Growth,2006,169:773.
13 Coriell S R, Murray B T, Chernov A A, et al. The effect of a shear flow on the morphological stability of a vicinal face: Growth from a supersaturated solution [J]. Adv Space Res,1998,22(8):1553.
14 Potapenko S Y. Formation of solution inclusions in crystal under effect of solution flow [J]. J Crystal Growth,1998,186:446.
15 Murray B T, Coriell S R, Chernov A A, et al. The effect of oscillatory shear flow on step bunching [J]. J Crystal Growth,2000,218:434.
16 Jayaprakasan M, Rajesh N P, Kannan V, et al. Effect of cerium on the growth and crystalline quality of KDP crystals [J]. Mater Lett,2007,61:2419.
17 Robey H F, Potapenko S Y, Summerhays K D. “Bending” of steps on rapidly grown KH2PO4 crystals due to an inhomogeneous surface supersaturation field [J]. J Crystal Growth,2000,213:340.
18 Vartak B, Kwon Y, Yeckel A, et al. An analysis of flow and mass transfer during the solution growth of potassium titanyl phosphate [J]. J Crystal Growth,2000,210:704.
19 Vartak B, Yeckel A, Derby J J. Time-dependent, three-dimensional flow and mass transport during solution growth of potassium titanyl phosphate [J]. J Crystal Growth,2005,281(2):391.
20 Cui Q D, Li M W, Yin H W. Growth of KDP crystal by 2D translation method and quality analysis [J]. J Synth Crystals,2015,44(6):1454(in Chinese).
崔启栋,李明伟,尹华伟. KDP晶体“二维平动法”生长及其品质分析 [J].人工晶体学报,2015,44(6):1454.
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2017, Vol. 31 
