Mass Transfer from a Pipe Pure water at 26.1°C is flowing at a velocity of 0.0305 m/s in a tube having an insi...
Mass Transfer from a Pipe Pure water at 26.1°C is flowing at a velocity of 0.0305 m/s in a tube having an inside diameter of 6.35 mm. The tube is 1.829 m long with the last 1.22 m having the walls coated with benzoic acid. Assuming that the velocity profile is fully developed, calculate the average concentration of benzoic acid at the outlet.The solubility of benzoic acid in water is 0.02948 kg mol/m3.
H2.3 Consider water at 20°C flowing through a horizontal pipe of diameter 15 cm and length 10 m. The flowrate is 0.021 m3/s and the wall shear stress is 5.76 N/m2. Assume fully developed flow. a. Verify that the flow is turbulent b. Determine the pressure drop [N/m2 c. Estimate the viscous sublayer thickness [mm], i.e., where y+ 5 d. Compare results of part c. with typical pipe roughness (see Table 8.1 in text and comment on implication e. Using...
7.9-1 7.9-1. Mass Transfer and Turbulence Models. Pure water at a velocity of 0.11 m/s is flowing at 261°C past a flat plate of solid benzoic acid where L = 0.40 m. Do as follows: (a) Assuming dilute solutions, calculate the mass-transfer coefficient k. Use physical-property data from Example 7.3-2. (b) Using the film model, calculate the equivalent film thickness. (c) Using the penetration model, calculate the time of penetration. (d) Calculate the mean surface renewal factor using the modified...
4. (25 pts) Water is flowing inside a thin wall, smooth pipe of diameter 0.05 m at a mass flowrate of 0.3 kg/s. The water enters the pipe at a mean temperature Tm,i= 80 °C and exits at Tm,o= 80 °C while the pipe surface temperature is maintained at Ts= 20 °C along its entire length. a. Is the flow turbulent or laminar? b. Calculate the average convection heat transfer coefficient inside the tube. c. Calculate the length of the...
Review A water filled pipe has water flowing at v1= 6.20 m/s in a section of pipe where the diameter is d1= 19.2 cm and the pressure is known to be P1= 7.00×104 N/m2 above atmospheric pressure. 1- If the pipe carries the water 3.5 meters up hill without any change in diameter, what is the new absolute pressure within the pipe? 2- After flowing up the hill described above, the pipe narrows to 80% of its original radius, what...
Twenty [kw] of heat is to be removed from 375 [k] water flowing at 0.15 [kg/s] into the inner pipe of concentric tube heat exchanger. Cooling water enters the annulus at 290 [k] and leaves at 320 [k] with a flow in the opposite direction of the inner flow. The diameter of the thin- walled inner pipe is 2.5 [cm] a) b) c) Calculate the exit temperature of the hot fluid and the mass flow rate of the cold fluid...
Q5 A process fluid is flowing with a velocity of 4 m/s in a steel pipe having a diameter of 187 mm and a length of 1 m and maintaining the pipe surface temperature of 96.C. The fluid is entering the pipe at a temperature of 25 C and leaving with a temperature of 76C, take Prandtl number as 12. The density and viscosity of the fluid are 1210 kg/m?, 1 x10Ns/m respectively and its thermal conductivity is 5x102 w/mk....
5.16. Water is flowing in a 3-cm-diameter pipe at an average velocity of Uav 2 m/s. Assuming water density of ρ-1000 kg/m 3 and viscosity μ-10-3 N s'm2, calculate the velocity at the center of the pipe, the shear τ at the wall, and the Reynolds number. Assuming laminar flow, calculate friction coefficient C and pressure drop dp/dx.
8-31 Water at 10°C (p = 999.7 kg/m3 and μ = 1.307 × 10-3 kg/m.s) is flowing steadily in a 0.20-cm-diameter, 15-m-long pipe at an average velocity of 1.2 m/s. Determine (a) the pressure drop, (b) the head loss, and (c) the pumping power requirement to overcome this pressure drop. Answers: (a) 188 kPa, (b) 19.2 m, (c) 0.71 W 8-32 Water at 15°C (p = 999.1 kg/m3 and μ = 1.138 × 10-3 kg/m . s) is flowing steadily in a 30-m-long...
Water enters a 5-mm diameter and 13-m long tube at 15 °C with a velocity of 0.3 m/s and leaves at 45 °C. The tube is subject to a uniform heat flux of 2000 W/m2. Assume the following properties of water: p = 996 kg/m3, Cp = 4178 J/kg.K, K = 0.615 W/m.K. u = 0.798 x 10-kg/mus. Pe=5.42. (7) What is the average convective heat transfer coefficient considering the entire length of the pipe? (a) 791 W/m2K (b) 681...