Study on transport properties of a flow in a spiral-tube heat exchanger

It is shown that the diffusion method may be used to measure effective diffusion coefficients and turbulence intensities in spiral tube bundles from the point source, the relations are obtained to calculate them. The results obtained agree by the order of magnitude, with those for the effective diffusion coefficient for a finned rod bundle and may be used to calculate coolant mixin.o in spiral tube bundles