Thermofluid Dynamics is a cross-discipline related to heat transfer, thermodynamics, and fluid dynamics with emphasis on the effect of thermal process on fluid flow. It consists of four parts:(1) Thermal Drag. In some cases this may strongly influence flow properties, such as mass flow rate, and heat transfer etc. From its definition and the analytical expression of the thermal drag coefficient, it is possible to predict the pressure drop and the critical heat flux of single phase gas flow and gas-liquid tw...

Many experiments indicate that mechanical properties of polycrystal-line materials are strongly affected by the grain boundary (g.b.). In this paper, the theoretical and experimental work on g.b. structures and their effect on mechanical properties of polycrystalline materials is briefly reviewed. In the first part of this paper, the different models proposed for describing the g.b. structures are introduced, including the dislocation model for describing small angle g.b., the coincidence site lattice (CSL)...

The fatigue of the fiber reinforced composites is a very active research field at present. According to the papers and research reports on fatigue of composites at home and abroad in the last two decades, this paper reviews the following four aspects, 1) The fatigue strength of composites and its influencing factors. 2) Initiation of composites damage and fatigue crack growth. 3) Models of fatigue damage. 4) Prediction of fatigue life. The further development and study topics in the fatigue of composites ar...