Eight different Kenics static mixers were investigated with the aim to identify the structural parameters for augmenting heat transfer through reduced flow resisitance. By changing the twist ratio and the twist angle of standard elements

as well as the distance between the elements

such a goal might he attained. Comparative tests with air in vertical Kenics devices weremade in the region of Reynold numbers from 2300 to 20000 to establish f-Re and Nu-Re correlations. Results obtained indicated that heat transfer could be augmented through reduced flow resistance

by appropriately increasing the twist ratio and twist angle of a standard Kenics static mixer However ample distance between the elements was also necessary lor attaining the better in heat transfer performences.