转速对KDP晶体成帽影响的数值模拟研究  

Numerical Simulation of the Influence of Different Rotation Speeds on the Capping of KDP Crystal

作　　者：刘光霞[1] 王圣来[1] 丁建旭[1] 孙云[1] 刘文洁[1] 朱胜军[1] 

机构地区：[1]山东大学晶体材料国家重点实验室,济南250100

出　　处：《无机材料学报》2013年第6期665-670,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金(50721002);国家自然科学基金青年基金(51202131)~~

摘　　要：本研究选择有限容积法,采用Fluent软件对KH2PO4(KDP)晶体在不同转速下成帽过程的温度场及速度场分布进行了数值模拟。晶体转速较低(9 r/min)时,晶体附近温度分布比较均匀,相应的晶体只出现一个帽区,但温度较高,成帽较慢;晶体转速较高(55和77 r/min)时,温度分布也比较均匀,所以晶体也只有一个帽区,此时温度较低,成帽较快;晶体转速介于两者之间时,温度分布出现扰动,晶体成帽同时出现两个或多个帽区,成帽速度介于两者之间。在所模拟晶体转速范围内,较高转速77 r/min是晶体帽区恢复的最优转速。The dependence of temperature and velocity distributions on rotation speed during KDP crystal growth process were numerical simulated via finite volume method and the Fluent software. It revealed that at the rotation speed of 9 r/min, the temperature value nearby the crystal was relatively higher, and the temperature distribution was stable, which resulted in single capping and slow capping speed. When rotation speeds reached 55 and 77 r/min, the temperature value nearby the crystal was comparatively low, which increased the supersaturation and accelerated the capping speed. The rotation speed between 9 and 50 r/min could bring temperature turbulence, and consequently led more capping. The capping speed was relatively moderate. The simulation result proved the rotation speed of 77 r/min was the optimum speed

关 键 词：KDP晶体 数值模拟 不同转速 晶体成帽 

分 类 号：O781[理学—晶体学]