Numerical modeling of nano-fluid flow inside a spiral micro-tube

Amir haghighatkhah¹ Milad abdollahi kahriz²

1) Master of Mechanical Engineering.
2) PhD student in Mechanical Engineering

Publication : 2nd International Congress On Engineering, Technology and Innovation(eticong.com/2nd)
Abstract :
In this study, numerical methods have been used to simulate the laminar flow of nanofluid inside the spiral micro-tube. Reynolds numbers range from 500 to 2500, helix diameters of 1, 1.5, 2 and 2.5 cm, volume fraction of CuO nanoparticles, 0%, 0.1%, 0.2%, 0.3% and 0.5%, and copper micro tube Whose wall temperature is assumed to be constant. The diameter of the micro-tube is 0.8 mm. In this research, the development of numerical model based on single-phase nanofluid model has been discussed. Then, the validation of the model and the independence of the solution from the mesh are examined. The results show that the use of spiral micro-tubes relative to straight tubes leads to improved heat transfer. The use of nanoparticles in the base fluid also improves the thermal performance of the system. As the diameter of the helix increases, the rate of heat transfer and the coefficient of friction decrease. For different modes, the performance evaluation criterion (PEC) was calculated and compared. It has been shown that a 1 cm diameter micro-tube with 0.05% water-CuO nanofluid has the best thermal performance.
Keywords : piral micro-tube water-CuO nanofluid Coil diameter Numerical modeling