In this investigation into vapour transport across gas-filled
enclosures, I first consider the various models used by earlier
researchers and then construct one general enough to include all the
essential physics but simple enough to be tractable. Solutions are found
for simple geometries and limiting cases in order to quantify the
effects of various phenomena. Here three phenomena
are selected for particular attention:
the interfacial velocity due to mass transfer,
the interdiffusion enthalpy flux,
and the role of the impermeable bounding walls connecting the source and the
sink.