GFA Accelerator Seminars

Turbulent Flow Simulations for Target Cooling

by Prof. Andris Jakovics

WBGB/019 (PSI)



As an introduction a short overview about research areas (mainly numerical modelling for different applications in metallurgy, glasses and semiconductor technologies) in the laboratory will be presented. For diverse liquid metal spallation targets like ESS and EURISOL converter sufficient cooling of the beam entrance window is most important. Results of numerical modelling of liquid metal turbulent flow (eddies structures, turbulent kinetic energy and viscosity) near the target window region will be shown. In a series of studies different turbulence models have been investigated. As expected, large Eddy Simulations gave the best correlation for turbulent flow and heat exchange characteristics, similar to applications for metal melting furnaces. The influence of different meshes using commercial software packages (ANSYS/CFX) and OpenFoam codes was studied too. Results for variable experimental setup geometries with mercury and water, applying different symmetry and boundary conditions are compared. Especially typical numerically estimated flow structures, distributions of turbulent energy and viscosity in comparison with PIV measurements, in PSI, and heat transfer coefficient measurements in IPUL will be discussed. Contact: Mike Seidel (3378)