Liquid Metal Heat Transfer Investigations Applied to Tokamak Reactor

The liquid metal (LM) investigations of hydrodynamics and heat transfer affected by longitudinal and transverse magnetic field (MF) were carried out. The current experiments program deals with temperature and velocity fields, local and average heat transfer intensities, temperature fluctuation intensities in a horizontal heated tube. The strong influence of thermo gravitational convection (TGC) in all regimes was observed in experiments applied to blanket and divertor of tokamak. Two unexpected troubles were discovered: zones of extremely low local heat transfer intensities in some regimes of MF and TGC joint influence; dangerous temperature low-frequent fluctuations with high amplitude near the tube wall in some MHD configurations with TGC affect. Numerical simulation of magneto hydrodynamic (MHD) heat transfer is working out simultaneously with experiments.