Studies on divertor cooling finger of helium mock-up through CFD approach

The use of impinging jets for divertor cooling in the conceptual design of fusion power plant is attracting much attention due to its high heat removal capability and moderate pumping power. The latest advanced divertor concept is based on modular design cooled by helium impinging jets. To reduce the thermal stresses, the plasma-facing side of the divertor is build up of numerous small cooling fingers cooled by an array of helium jets. In this study, a systematic approach towards modeling of one such cooling finger is numerically investigated. The reference geometry for this simulation is in accordance with Končar et al. The simulation results for the reference finger geometry are validated against high heat flux experiments and a good agreement is noticed between the present simulation and the reported Computational Fluid Dynamics (CFD) result. (author)