Streaming currents in flows of cryogenic liquids

In spite of a very large dispersion of the experimental results due to the difficulties to make experiments in cryogenic liquids, the space charge convected by flows of such liquids seems to be independant of the Reynolds number, as it was predicted, and the influence of the diameter to be negligible for small values of this parameter. More, the always very high streaming currents observed in hydrogen liquid justify the very important safety conditions which must be taken in industrial installation using this liquid.