. Figs. 4 and 5 can be used to identify this contradiction. Figs. 4 and 5 show the temperature profiles of tube wall and gas flow for tube wall thermal conductivities of 400 and 16 W m1 K1 , respectively.
. Figs. 4 and 5 can be used to identify thiscontradiction. Figs. 4 and 5 show the temperature profilesof tube wall and gas flow for tube wall thermal conductivitiesof 400 and 16 W m1 K1, respectively.