欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
固壁表面发生的冷凝过程广泛存在于工程领域中，具有重要的研究意义。本文采用分子动力学模拟方法，对氩气在光滑／粗糙铂金属壁面的冷凝过程进行了研究，观察了近壁面区内液体的层状和网状密度分布特征及固液界面处的温度跳跃现象，前者是由固体表面作用势所致，后者则是分子热运动在微尺度固液界面区域所呈现的特殊现象。通过对不同工况模拟结果及系统内传热传质特性的分析发现，随着壁面凸起高度的增加，流固接触面积增大，接触热阻减小，换热效果得到了强化；凝结过程换热量随凸起高度的增加呈增长趋势；热量传递过程中，相变潜热量始终占总传热量的60％左右。
英文摘要：
The condensation on solid surface is commonly applied in engineering field and is of great significance for study. In present work, the condensation of vapor （Ar） on smooth/coarse solid （Pt） surface was studied employing non-equilibrium molecular dynamics simulation method. The layering and meshy distributions of density in the solid-neighboring region, and the temperature jump at the solid-liquid interface were observed from the statistical results. The former is due to the surface potential of the wall and the latter is the characteristic microscopic phenomenon of molecular thermal motion at liquid-solid interface. By comparative analysis between the results based on different solid surface patterns, it＇s found that when the surface becomes coarser, the contact area between solid and fluid increases and the contact thermal resistance decreases, so the heat transfer is enhanced. The heat flux is increased with increasing height of convexity. The latent heat always takes up about 60% of the total heat flux for all cases.
同期刊论文项目
同项目期刊论文
期刊信息
位置：