Numerical study of the effect of longitudinally finned pipes on heat exchangers for heat transfer and flow pattern

In this paper, the fin profile of heat exchangers change effect on the heat transfer and fluid flow pattern has been investigated. In order to best model presentation to the user by comparing the various models results. For numerical simulation and discretization of governing equations, the finite volume method and for coupling the velocity and pressure fields, the SIMPLEC method have been used. The inlet fluid to heat exchanger is Newtonian; the fluid is steady, incompressible and according to Reynolds number range, is turbulent; the no-slip condition has been applied on the walls.Also the inlet fluid temperature is 573K and the heat exchanger walls have constant temperature equal to 353K. The numerical results have been compared with valid data which illustrated good agreement. The average Nusselt number on the wall, pressure drop, output temperature, and velocity variation have been analyzed in different models with more details for two mass flow rates. The results show that the heat exchanger with 6 fins and m ̇=0.04 kg⁄s has best performance and presented the high nusselt and PI and also low pressure drop.