Enhancement of forced convective heat transfer and frictional characteristics in meshes inserted tubes

An experimental investigation of forced convective heat transfer and frictional characteristics in meshes inserted tubes was carried out. The results of experiments showed that the meshes can increase the tube side heat transfer and fluid friction significantly. The ratio of diagonal length of rhombus mesh (in tube axis direction) to distance between mesh parallel lines is the main factor that influence heat transfer. Various heights of meshes make some difference to enhancement of heat transfer and the size of meshes has little effect on heat transfer. When compared at equal pumping power and heat exchanger surface area, the maximum improvement of 21% in heat transfer coefficient is reached