Thermo Mechanical Analysis of Divertor Test Mock-up using COMSOL Multiphysics
Y. Patil1 D. Krishnan1 S. S. Khirwadkar1
1Institute for plasma research, Bhat, Gandhinagar, Gujarat, India
Divertor is act as an exhaust for the nuclear fusion reactor. Main function of a divertor is to remove the heat flux from the plasma. Plasma facing components of the divertor are made up of Carbon (Graphite/CFC) and tungsten like materials. Hence these materials are exposed to the transient heat loads up to 10MW/m^2. Thermo mechanical behavior of Graphite test mock-up under the transient heat loads was simulated using heat transfer and structural mechanics modules of COMSOL Multiphysics. 3D semi-model of Graphite test mock-up was developed in COMSOL Multiphysics. Material properties and boundary conditions are assigned to it. Extracted heat flux by mock-up is 7.22 MW/m^2 which corresponds to incident heat flux 10MW/m^2 was incident on mock-up and temperature profile has been calculated as shown in figure 1. Stress developed during transient heat loads at various parts of mock-up has been calculated using structural mechanics.