Photochemical reactor modeling: a case-study problem. Although radiation is important in heat transfer, an analogous model can be used in the design of photochemical reactors. The modeling of these reactors….
Determine the Velocity of paddle blades (ft/s).
A flocculator that is 100 ft long, 50 ft wide, and 20 ft deep houses four, horizontal paddle-wheels. Each paddle-wheel has four symmetrical arms with fiber glass boards, 6.5 ft from the shaft to the center of board rotating at 1.5 rpm. Paddles are 42 ft long and 8 inches wide. The water treatment plant processes 25 MGD of water. Assume that the mean water velocity is 25% of the paddle velocity and CD equals 1.8, and and ρ are equal to 2.735 × 10−5 lb⋅s/ft4 and 1.936 lb⋅s/ft2, respectively. Determine the following:
a. Velocity of paddle blades (ft/s).
b. Total power input (hp).
c. Velocity gradient (s−1).
d. Detention time (min).
e. G (dimensionless).