化工学报2016，Vol.67Issue(z2)：128-135,8.DOI:10.11949/j.issn.0438-1157.20161399
粒数衡算与多相流耦合求解刮削制冰的晶粒特性
Crystallization simulation of scraped surface freezer based on coupling model of population balance and multiphase flow
摘要
Abstract
By discretizing the population equation into different size groups,a method was established for solving the population balance equation coupled with multiphase flow field.A computational fluid dynamics simulation with population balance model was performed for the scraped surface freezer.The algorithm considering nucleation rate,growth rate,crystal aggregation and breakage was used for describing the water dynamic ice-making crystallization process.By using this model,the key role of crystal aggregation and breakage was reappraised,and the ice crystals number density distributions were obtained in the scraped surface freezer.Then the influence of temperature,scraping speed and the crystallization time on the dynamic crystallization process of the water was studied.The results show that the crystal size distribution would be more centralized and uniform with the crystals aggregation and breakage;if the supercold temperature difference is less than 20℃ and the scraping speed is not more than 10 r·s-1 ,the crystallization process would be accelerated by reducing the wall temperature or increasing the scraping speed.关键词
相变/多相流/模型/粒数衡算/结晶/数密度/聚并和破碎Key words
phase change/multiphase flow/model/population balance/crystallization/number density/aggregation and breakage分类
能源科技引用本文复制引用
贾雪迎,梁坤峰,李盈盈,袁争印,阮春蕾,王林,董彬,芮胜军,李健..粒数衡算与多相流耦合求解刮削制冰的晶粒特性[J].化工学报,2016,67(z2):128-135,8.基金项目
国家自然科学基金项目(U1304521,11402078) （U1304521,11402078）
河南省高校科技创新人才支持计划项目(16 HASTIT027)。 （16 HASTIT027）
