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首页> 外文期刊>International Journal of Heat and Mass Transfer >Numerical simulation of the hydrodynamics and mass transfer in 3D spiral motion system for KDP crystal growth
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Numerical simulation of the hydrodynamics and mass transfer in 3D spiral motion system for KDP crystal growth

机译：KDP晶体生长的3D螺旋运动系统中流体力学和传质的数值模拟

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摘要

A numerical study of the unsteady turbulent flow and mass transfer involved in the potassium dihydro-gen phosphate crystal growth from an aqueous solution with a three-dimensional spiral motion configuration was performed using the standard k-e model with an enhanced wall treatment. The three-dimensional spiral motion is composed of a uniform circular motion on the horizontal plane and a reciprocating motion in the vertical direction. The simulation indicates that the crystal spiral motion will drive the mainstream solution rotating around the axis of the growth vessel and form an oscillatory flow near the crystal, which results in a periodical reversal of the supersaturation distribution on the crystal faces and effectively suppresses the morphological instability of the crystal surfaces. With the increase of the orbital radius R or the characteristic rotation rate ω, the line speed V_0 of crystal in the horizontal plane will increase, leading to a decline of the thickness of the diffusional boundary layer and an increase of the time-averaged supersaturation on the crystal faces. At the same time, the homogeneity of the surface supersaturation will be improved too, which would benefit the morphological stability of the crystal surfaces. However, when the crystal size increases, the time-averaged supersaturation on the crystal faces will decrease and its homogeneity will deteriorate. Therefore, with crystal growth, increasing the orbital radius, R, and reducing the period, T_1t of the crystal circular motion are necessary.
机译：使用具有增强壁处理的标准k-e模型，进行了三维螺旋运动构型的水溶液中涉及的磷酸二氢钾磷酸酯晶体生长中非稳态湍流和传质的数值研究。三维螺旋运动由水平面上的匀速圆周运动和垂直方向上的往复运动组成。仿真表明，晶体螺旋运动将带动主流溶液绕生长容器的轴旋转，并在晶体附近形成振荡流，从而导致晶体表面过饱和度分布的周期性反转，并有效地抑制了形态不稳定性。晶体表面。随着轨道半径R或特征转速ω的增加，水平面中晶体的线速度V_0将增加，从而导致扩散边界层厚度减小，并且时域平均时间过饱和度增大。水晶脸。同时，表面过饱和度的均匀性也将得到改善，这将有利于晶体表面的形态稳定性。然而，当晶体尺寸增加时，晶体表面上的时间平均过饱和度将减小并且其均质性将恶化。因此，随着晶体的生长，增加轨道半径R并减小周期，晶体圆周运动的T_1t是必要的。

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  • 来源
  • 作者

    Zhitao Hu; Mingwei Li; Huawei Yin; Chuan Zhou;

  • 作者单位

    Key laboratory of low-grade Energy Utilization Technologies and Systems, Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400030, People's Republic of China;

    Key laboratory of low-grade Energy Utilization Technologies and Systems, Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400030, People's Republic of China;

    Key laboratory of low-grade Energy Utilization Technologies and Systems, Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400030, People's Republic of China;

    Key laboratory of low-grade Energy Utilization Technologies and Systems, Ministry of Education, College of Power Engineering, Chongqing University, Chongqing 400030, People's Republic of China,SP1C Yuanda EP Science & Technology Branch, Chongqing 401122, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Fluid flows; Mass transfer; KDP crystal; Crystal growth from solutions; Spiral motion; Turbulent model;

    机译：流体流动;传质;KDP晶体;溶液中晶体的生长;螺旋运动;湍流模型;

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