Heat Transfer Su Yongkang School of Mechanical Engineering Internal Flow Heat Transfer Where we’ve been …… Introduction to internal flow, basic concepts, energy balance

Heat Transfer Su Yongkang School of Mechanical EngineeringInternal Flow Heat Transfer Where we’ve been …… Introduction to internal flow, boundary layer growth, entry effects Where we’re going:

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

全息干涉术是人们在大量全息照片的拍摄实践中发现并发展起来的一门新的光学干涉 技术．1962 年第一张激光全息照片成功地拍摄以后不久，美国以利思（E.N.Leith）为首的 全息研究小组偶然发现，当一张全息感光干板进行了二次重复曝光，而在这二次曝光之间， 被摄物又稍有移动，则摄得的全息照片的再现物像上将呈现出一些独特的干涉条纹簇．

1914 年夫兰克（F. Franck）和赫兹（G. Hertz）在研究气体放电现象中低能电子与原子 间相互作用时，在充汞的放电管中发现：透过汞蒸汽的电子流随电子的能量呈现有规律的 周期性变化，间隔为 4.9 eV，并拍摄到与能量 4.9 eV 相对应的波长为 253.7 nm 的光谱线． 该实验证实了原子内部能量是量子化的，为玻尔于 1913 年发表的原子理论提供了新的 实验事实．