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.A saturated steam at 410K is being transported in a pipeline (brass drawing tubing) at a rate of 1 grams/second. Pipe has inside diameter of 0.025 m . The tube is 100m long. The pressure at the entrance is 80kPa. It will under compressible or incompressible criteria. (use Perry's Handbook for the properties and constants) R = 8314J/kgmol.K; MW=18.02g/molThe 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.A saturated steam at 410K is being transported in a pipeline (brass drawing tubing) at a rate of 1 grams/second. Pipe has inside diameter of 0.025 m . The tube is 100m long. The pressure at the entrance is 80kPa. What is the value of G in kg/s.m2?. (use Perry's Handbook for the properties and constants) R = 8314J/kgmol.K; MW=18.02g/mol
- Pinch temperature at hot stream is 70C, while at cold stream is 60CAir 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:Topic: Heat transfer Completely solve and box the final answer. Water flows at 5m/s is passed through a tube of 2.5 cm diameter, it is found to be heated from 20degC to 60degC. The heating is achieved by condensing steam on the surface of the tube and subsequently the surface temperature of the tube is maintained at 90degC. Water properties are as follows: density=995kg/m3, kinematic viscosity=.657x10-6 m2/s, Pr=4.43, k=.628W/mK, cp=4178J/kgK. Determine the Reynolds number.
- 7-2 Air and water flow at 0.08 kg/s and 0.32 kg/s respectively in a horizontal tube of inside diameter 25 mm. The mean pressure is 9.90 bar (absolute) and the pressure drop across a length of 5 m is 342 FLUID FLOW FOR CHEMICAL ENGINEERS 0.215 bar. What is the value of the friction factor? Assume isothermal conditions. Data: at 9.90 bar, VG = 8.28 x 10-2 m³/kg, V₁ = 1.02 X 10-3 m³/kg.q1the title of the book: Engineering Thermofluids Thermodynamics, Fluid Mechanics, and Heat Transfer by: Mahmoud Massoud