Premium
Optimizing Mass Transfer Control Using a Stirring Paddle for the Rapid Growth of KDP Crystals
Author(s) -
Hu Kaiwei,
Zheng Lili,
Zhang Hui,
Chen Duanyang,
Qi Hongji
Publication year - 2018
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201800090
Subject(s) - paddle , supersaturation , mass transfer , crystal (programming language) , rotation (mathematics) , materials science , turbulence , volumetric flow rate , rotational speed , mechanics , crystal growth , chemistry , thermodynamics , crystallography , geometry , composite material , physics , classical mechanics , mathematics , computer science , programming language
Numerical simulations are performed to study the rapid growth of potassium dihydrogen phosphate crystals with a designed stirring paddle. The paddle is expected to produce a downward flow and enhance mass transfer near the crystal surface. The effects of rotation rate and crystal size on downward flow speed are investigated. As the rotation rate and crystal size increase, the downward flow speed increases linearly. The mass transport in the turbulent boundary layer is analyzed, and the surface supersaturation is calculated theoretically. The solute supply can be guaranteed by controlling the rotation speed of the stirring paddle during crystal growth.