Abstract

The turbulent hydrodynamics in a conventional operating crystallizer for growing kalium dihydrophosphate crystals is analyzed by physical modeling methods. The potentialities of an axisymmetric crystallizer, which has similar tools for stirring solution but is able to ensure controlled laminar hydrodynamic flows are considered. A combined mathematical model is formulated, which takes into account both the convective salt transfer in the crystallizer on the basis of solving the Navier–Stokes and diffusion equations and the kalium dihydrophosphate crystal growth on the basis of the theoretical model. A parametric calculation is performed to determine the effect of each mechanism of solution motion, including the directed solution outflow from a tube into the crystallizer and the rotation of crystal and stirrer.

中文翻译：

---

KDP晶体生长中的流体动力学和传质过程建模

摘要

通过物理建模方法分析了用于生长二氢磷酸钾晶体的常规操作结晶器中的湍流流体动力学。轴对称结晶器的潜力，它具有用于搅拌溶液的类似工具，但能够确保控制层流流体流动。建立了一个组合的数学模型，该模型考虑了在解决Navier-Stokes和扩散方程的基础上结晶器中的对流盐转移以及在理论模型的基础上考虑了二氢磷酸钾晶体的生长。进行参数计算以确定溶液运动的每种机制的影响，包括从管子直接流入结晶器的定向溶液流出以及晶体和搅拌器的旋转。