摘要
为了更好地理解相变浆体的流动与热质传递过程,对冰晶颗粒在水中的浮升融化过程进行了数值计算研究.计算模型考虑了多种作用力下冰晶颗粒的自由浮升过程,并通过焓-多孔介质法对颗粒浮升中伴随的融化过程进行了描述.利用该模型研究了流体与颗粒的换热温差以及颗粒内部过冷对其非均匀浮升融化过程的影响,获得了颗粒浮升融化过程中的形态变化以及涉及到的流动与传热特性.计算结果表明,冰晶颗粒内部的过冷度对颗粒的融化有极大的阻碍作用.
In order to understand the flow and heat transfer characteristics of phase change slurry, the floating and melting process of an ice particle in water is numerically studied. The free-floating process of an ice particle under various forces is numerically modelled, and the melting process of solid particle is described by enthalpy-porous method. The model is implemented to study the floating and non-uniform melting process of an ice particle at different temperature variations and internal supercooling degrees. The morphological change of ice particle and the thermo-fluidic characteristics during floating and melting process are obtained. It is found that the internal supercooling degree of ice particle delays the melting of ice particle.
作者
张雨龙
张鹏
马非
ZHANG Yulong;ZHANG Peng;MA Fei(Institute of Refrigeration and Cryogenics.Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2020年第5期473-480,共8页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(51676122)。
关键词
冰晶颗粒
过冷
自由浮升
非均匀融化
ice particle
supercooling
free-floating
non-uniform melting
