Nanofluid turbulent flow inside a duct equipped with disturber with new shape

Abstract To intensify the productivity of solar systems, researchers utilized a perforated tape with obstacles in a circular tube filled with nanomaterial. ANSYS FLUENT was used to simulate the results, combining K‐ε approach and a homogeneous approach for the nanomaterial. Grid size was optimized to reduce computation costs, and the accuracy of the simulation was verified using previously published data. The simulations considered the height of the disturber and the revolution as parameters. The insertion of the disturber increases the impingement with the wall, resulting in a colder outer wall. Although the use of the tape increases convection, resistance with the wall also increases. Therefore, a perforated tape shape was used with obstacles to intensify rotational velocity. Increasing the height and number of revolutions can enhance velocity by 4.58% and 7.04%, respectively. Meanwhile, as the values of N and Re increase, the temperature decreases by 2.1% and 0.11%, respectively.