4. For a thermally fully developed flow in a pipe for a fluid with constant properties, the local convection coefficient (a) Decreases as x-1/2 (b) Decreases as x-1/5 (c) Increase as x1/2 (d) Increases as x4/5 (e) Remains constant
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- 1- Consider single-phase fluid flow in a 1-D horizontal reservoir.The reservoir is discretized using four blocks in the x-direction. A well located in block 3 produces at a rate of 400STB/D. All grid blocks have Ax-250ft, w-900ft, h-100 ft, and kx-270md. The FVF and the viscosity of the flowing fluid are 1.0 RB/STB and 2cP, respectively. Identify the interior and boundary blocks in this reservoir. Write the flow equation for block 3 and give the physical meaning of each term in the equation.1. Heated air at 1 atm and 35°C is to be transported in a 150-m-long circular plastic duct at a rate of 0.35 m³/s (Fig. 1). If the head loss in the pipe is not to exceed 20 m, using the Colebrook equation and consulting with the FE Reference Handbook and appropriate table(s) for equations and properties. Write a Matlab code to determine the i. ii. iii. iv. minimum diameter of the duct, the friction factor, average flow velocity and Reynolds number of the flow 0.35 m³/s air D -150 m Fig 1The liquid food is flowed through an uninsulated pipe at 90 ° C. The product flow rate is 0.3 kg / s and has a density of 1000 kg / m³, specific heat 4 kJ / (kg K), a viscosity of 8 x 10-6 Pa s, and a thermal conductivity of 0.55 W / (m) K). Assume that the change in viscosity is negligible. The internal diameter of the pipe is 30 mm with a thickness of 3 mm made of stainless steel (k = 15 W / [m ° C]). The outside temperature is 15 ° C. If the outer convective heat transfer coefficient is 18 W / (m² K), calculate the heat loss at steady state per meter pipe length. a. Find the convection coefficient in pipe = W / m² ° C. b. Calculate heat loss per meter pipe length = watts
- 200 pm 0.12 cm Fluid Stationary cylinder 4 In regions far from the entrance, fluid flow through a circular pipe is one-dimensional, and the velocity profile for laminar flow is given by u(r) = Umax(1 - r/R9), where R is radius of the pipe, r is the radial distance from the center of the pipe, and Umax is the maximum flow velocity, which occurs at the center. Obtain (a) a relation for the drag force applied by the fluid on a section of the pipe length L and (b) the value of the drag force for water flow at 20°C with R = 0.08 m, L = 15 m, Umax = 3 m/s, and u = 0.0010 kg/m.s. %3DThe liquid food is flowed through an uninsulated pipe at 90 ° C. The product flow rate is 0.4 kg / s and has a density of 1000 kg / m³, specific heat 4 kJ / (kg K), a viscosity of 8 x 10-6 Pa s, and a thermal conductivity of 0.55 W / (m) K). Assume that the change in viscosity is negligible. The internal diameter of the pipe is 20 mm with a thickness of 3 mm made of stainless steel (k = 15 W / [m ° C]). The outside temperature is 15 ° C. If the outer convective heat transfer coefficient is 18 W / (m² K), calculate the heat loss at steady state per meter of pipe length. a.Find the convection coefficient in the pipe = AnswerW / m² ° C. b. Calculate heat loss per meter pipe length = Answerwatt.Pinch temperature at hot stream is 70C, while at cold stream is 60C
- Air enters a duct (100 cm *10 cm*10 cm) at 32°C at a rate of 0.28 m/min to cool 138 W electronic component placed on the duct. Assuming 85 percent of the heat generated inside is transferred to air flowing through the duct and the remaining 15 percent is lost through the outer surfaces of the duct. What is the convective heat transfer coefficient (W/m2.°C), Assume fully developed flow for the whole channel length and (if flow is NOT Laminar use Dittus-Boelter equation:Nu=0.023 Re0.8Pr") E1007 J/kg.°C, v =1,654×10 m /s, p = 1.146 kg/m Pr= 0.7268, k = 0.02625 W/m. °C Select one:A shell-and-tube heat exchanger is used to cool compressed liquid methanol from 176 °F to 104 °F. The methanol flows on the shell side of the exchanger. The coolant is water that rises in temperature from 50 °F to 86 °F and flows within the tubes at a rate of 68.9 kg s1. Finding the appropriate thermophysical data and applying the proper equations, you are required to do the following: (a) Calculate i) methanol mass flow rate in the exchanger, ii) methanol volumetric flowrate at the inlet of the exchanger. (b) i) For the counter-current flow of the fluids calculate the log temperature difference, ii) explain the purpose of calculating this difference, iii) explain, quantitatively, why is the counter-current flow in heat exchangers preferred to co-current flow. mean(1) Given the working form of the Bernoulli equation as dW - F dm Where 3 is the friction heating per unit mass dP F = Au - dm Given also that friction heating in laminar flow of Newtonian fluids in circular pipes is given as -AP F =- = -gAz = Q Ax " 128 Ax is change in the x-direction. A typical capillary viscometer has a large-diameter reservoir and a long, small diameter, vertical tube. The sample is placed in the reservoir and the flow rate due to gravity is measured. The tube is 0.1 m long and has a 1 mm ID. The height of the fluid in the reservoir above the inlet to the tube is 0.02 m. The fluid being tested has a density of 1050 kg / m. The flow rate is 10* m³ / s. What is the viscosity of the fluid? Typical capillary viscometer
- Find the volume flow rate and direction of a certain fluid flowing in a tube system as shown below. 2 8 10 Flows in cm³/s 1.01 4 in O 2; in O 2; out Cannot be determined; insufficient information. O 1; out6 m 6 m Elbow 6 m 3 m. Activate Wind Goto Sectines1 15 m A fluid is pumped at a rate of 0.00156 m/s through a 0.025-m-diameter pipe to fill a 9°C 020Pls do neatly nd correctly