Measurement in a downscaled water mockup and numerical simulation for the DRESDYN large scale precession experiment

Precession has long been discussed as a complementary energy source of homogeneous dynamo action. In the framework of DRESDYN (DREsden Sodium facility for DYNamo and thermohydraulic studies) a precession driven dynamo experiment is under construction. For proper dimensioning of the sodium experiment, measurements at the 1:6 down scaled water mockup are compared to numerical simulations. We present pressure, velocity, and motor power measurements for the water mockup. Furthermore we provide an insight into mechanical engineering aspects of the real sodium experiment.