US3566501A Method of making spiral chute Google Patents
In a method of fabricating a spiral chute slide section 2 262 691 11/1941 Matter 2914 wherein a predetermined shape comprising inner and outer 2 460 024 1/ 1949 McKee curved edges and a plurality of edges defining the ends 2 669 012 2/1954 Bruegger of said section is cut from a fiat sheet the improvement 2 917 815 12/1959
Effect of channel configuration on the water sterilization
As illustrated in Fig 10 a the inactivation value was and log for the serpentine and spiral configurations respectively Fig 11 a and b illustrates the velocity fields at the channel turn in the serpentine and spiral configurations respectively The flow pattern of the serpentine configuration exhibited an obvious vortex pair