The present work was undertaken for the purpose of observing wetted area of packing materials in the packed columns. Studies were made on two kinds of Raschig rings by using a dyestuff.
The schematic diagram of experimental apparatus is shown in Fig. 1-A and the specifications of Raschig rings are listed in Table 1.
The gas rate and viscosity of the liquid has no significant on wetted area.
The effects of liquid rate and surface tension of the liquid used are as follows ;
a_w / a_t = k'L^1/3 σ^m
k'=0.824 m=-0.96 for 17-mm rings
k'=0.368 m=-0.65 for 27-mm rings
The values of a_w/a_t varied with the packing height to the -0.05 power for all packing materials.