Unit 12 Transport Phenomena in Process Industry Of course,heat and mass transport occur frequently in fluids,and for this reason some engineering 正因为如此 educators prefer to include heat conduction and diffusion in solids,however,the subject is actually of 不过 这个学科 wider scope than fluid mechanics. Of course, heat and mass transport occur frequently in fluids, and for this reason some engineering 正因为如此 educators prefer to include heat conduction and diffusion in solids, however, the subject is actually of 不过 这个学科 wider scope than fluid mechanics. Unit 12 Transport Phenomena in Process Industry