CFD analysis of (TiO2)–H2O Nanofluids on Si-IGBT power electronic module with a new micro-nozzle model

In this paper, in order to improve the cooling power, the thermal effects of using titanium oxide nanoparticles with different concentrations and perforated nozzles with paddle blades are investigated. In this simulation, by presenting a new design for a Si-IGBT power module, three types of paddle blades with a simple nozzle type to pump cooling fluid are evaluated and compared. The boundary condition is that a constant heat flux enters from the top of the module, i.e., IGBT and the Diode. In order to further investigate the thermal effects, an attempt has been made to investigate the temperature of the module under a heat flux of 150 W cm −2 , 180 W cm −2 , 255 W cm −2 , so that the IGBT heat flux is always higher than the Diode input flux. In this robust and three-dimensional simulation extracted from ANSYS-FLUENT commercial software, it was found that turbulent kinetic energy increases with increasing number of nozzle blades. At the same time, increasing the volume fraction of nanoparticles from 0.01 to 0.05 leads to improved heat transfer and ultimately reduces the thermal peak created in the study space. In addition, increasing the transverse mass flow rate improves cooling, which reduces the performance coefficient (COP) of the system.