Numerical simulation of the fluid flow inside the pressurized tube of the CANDU -6 reactor using the Computational Fluid Dynamics and the presence of nanoparticles in the cooling flow

Recently, Numerous applications of nanofluid in various industries have led to the consideration of increasing the flow efficiency through nanofluid in nuclear reactors. One of the most important safety issues in the reactors is the safety margin of the cooling flow. For this purpose, the performance of flow without presence/presence of nanofluid is simulated numerically with the CFX software. The finite volume numerical method with the SST transition model for numerical analysis has been used, here. The flow in the pressurized pipe is analyzed using a fixed coordinate system. Four different volume fractions are numerically investigated in the nanofluid flow. To ensure the accuracy of the simulation and the setting of boundary conditions, a physical variable (outlet temperature from the pressure pipe) was monitored. The low numerical error has increased the confidence of the results. The results show that the 10% volume fraction has improved the performance of the flow.