Probes for local velocity and temperature measurements in liquid metal flow

A permanent magnet probe for local velocity, temperature and turbulent heat flux measurements in liquid metals is described. The sensitivity and the linearity of the probe are discussed and the thermoelectric and thermomagnetic sources of error are estimated, since they can be important. It is found that in flow regimes influenced by natural convection one has to correct for the thermoelectric effect. Results from isothermal and non-isothermal flow of liquid sodium at Re = 40,000 and qsub(wall) = 20.0kWm-2 are presented and compared with previous data for liquid metals and air. (author)