Theoretical study on melting of phase change material by natural convection

Natural convection plays a crucial role in latent heat storage system. Determining how natural affects the melting of phase change material (PCM) will provide better understanding process and give helpful advice on strengthening techniques. The research content this paper is mathematical model established to explain PCM affected by convection. given introducing temperature gradient. A coordination factor (Co) based model, which an instantaneous quantity proportional exchange rate intensity convection, introduced process. square-shaped shell-tube (concentric, eccentric) unit were numerically analyzed more detail. It found that Co closely related rate. not promote when less than 0 while it higher 0, value, faster This gives clear quantitative explanation for problem interface movement as well increasing heating changing only shape can greatly enhance study. also provides theoretical guidance study enhancement.