1) Consider the infinitely tall, annular mixing tank. The fluid to be mixed is between the inner cylinder and the Fluid outer wall. The fluid is mixed by a Fluid k spinning the inner cylinder at an angular velocity of n (s-1). The tank has an inner radius of R (m) and the R. inner cylinder has a diameter of k (m). Fluid There is no net flow in the vertical or C. radial directions. Top view Answer the following questions about this sytem: Side view

1) Pavithran Ravindran explains to a group of inspiring CBE students that the Reynolds number is a dimensionless group defined for a fluid flowing in a pipe as Re = Dvp/µ where D = pipe diameter, v = average fluid velocity, p = fluid density, and u = fluid viscosity. When the value of the Reynolds number is less than about 2100, the flow is laminar -- the fluid flows in smooth streamlines. For Reynolds numbers above 2100, flow is turbulent -- a great deal of internal agitation takes place. %3D Methyl ethyl ketone (MEK) flows through a 2.067-in. ID pipe at 20°C, at which temperature its density is 0.805 g/cm³ and its viscosity is 0.43 centipoise (1 centipoise = 1.00 x 10-3 kg/m.s). The average fluid velocity is 0.048 ft/s. Determine whether the flow is laminar or turbulent. %3D

chemical engineering A power plant emits 216 g of SO2 every hour. The wind recorded on the same day is 5 m s-1, and the atmospheric stability class is A for the clear summer afternoon. There is no plume rise, and the stack height is 30 m. The values of σy and σz are 215 m and 450 m, respectively. Determine: the concentration of SO2 0.7 km downwind along the plume centreline at ground level.

1. Cold water is flowing into and get heated in a pipe wrapped with electrical heating wires. At a certain heating power P, the temperature profiles is given on the left below. If the cold water temperature (Tm,in) and mass flow rate remains the same, but the electrical heater power increases, how would the temperature profiles look like? Sketch on the right below and provide brief explanation (less than 100 words). TS Tm,out Tm,in Tm Tm,in

Final answer in two decimals. Show the solution.