I work in the field of nanofluids. While reading literature I come across the concept of "Duhkin length", I currently only know the meaning of Debye length in this area. Could you explain the meaning of Duhkin length?
Searching for this seems to give limited results, but the number is defined in this work as the ratio of the surface conductance over the bulk conductance for a fluid confined in a nanochannel. This seemingly would be analogous to the inverse of the Nusselt number.