化工进展2012，Vol.31Issue(5)：981-986,6.
喷雾冷冻法单个液滴冻结过程模拟
Numerical simulation of a single droplet freezing process
耿县如 1徐庆 1李占勇 1宋继田1
作者信息
- 1. 天津科技大学机械工程学院,天津300222
- 折叠
摘要
Abstract
Droplets freezing process by spray freezing leads to their complex microstructures due to the formation of ice crystals within droplets. Numerical simulation was conducted to study the effect of droplet size, gas velocity and environmental temperature on the freezing process for a single droplet. Uniform temperature model was adopted in the simulation of droplet freezing process. The results show that the total solidification time for larger droplet is about 3 orders longer than that for the smaller one. Freezing rate is enhanced as gas velocity increases and environmental temperature decreases. Using variance analysis method, it is fotmd that droplet size, gas velocity and environmental temperature have significant impacts on droplet total solidification time （p=0.0063〉0.05） . During cooling process, the ratio of droplet mass loss due to convection decreases to lesser extent with the increases of droplet size and gas velocity, which is about 2%. Lower environmental temperature, which is an influential parameter, results in lower droplet mass loss ratio.关键词
单液滴/冻结过程/数值模拟/方差分析/质量损失Key words
single droplet/freezing process/numerical simulation/variance analysis/mass loss ratio分类
通用工业技术引用本文复制引用
耿县如,徐庆,李占勇,宋继田..喷雾冷冻法单个液滴冻结过程模拟[J].化工进展,2012,31(5):981-986,6.
