Heat Transfer Su Yongkang School of Mechanical Engineering External Flow: Other Shapes Where we’ve been …… Empirical correlations and analytical solutions Where we’re going: Applications to other shapes (cylinders and spheres)

Heat Transfer Su Yongkang School of Mechanical Engineering External Flow: Flat Plate Where we’ve been …… General overview of the convection transfer equations. Developed the key non-dimensional parameters used to characterize the boundary layer flow and convective heat and mass transfer

Heat Transfer Su Yongkang School of Mechanical Engineering Boundary Layer Similarity Parameters The boundary layer equations (velocity, mass, energy continuity) represent low speed, forced convection flow

Heat Transfer Su Yongkang School of Mechanical Engineering CH6 – INTRODUCTION Where we’ve been …… Basic Conduction Heat Transfer Finished Fourier’s law:

哈尔滨工业大学：PHOENICS软件——计算传热学与计算流体力学的理想选择

1. 传热学（Heat Transfer） (1) 研究热量传递规律的科学，具体来讲主要有热量传递 的机理、规律、计算和测试方法 (2) 热量传递过程的推动力：温差

1911年，Kamerlingh Onnes 发现低温超导体。从此人们对超导理论和超导技术展开了深入广泛的研究

一、基片 二、成膜工艺 三、性能检测

薄膜的聚集密度： P=薄膜中固体部分的体积：薄膜的总体积 薄膜的P在0.75～0.95之间，而大块材料P为1 牢固度和硬度、耐潮湿本领 下降、光的散射和吸收损失 加大导致耐激光损伤能力下 降，折射率随外界环境发生 变化

1.减反膜 2.滤光膜 3 保护膜 4 内反射 5 外反射 6 高反膜