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- (heat transfer ) thanks The velocity of the fluid flowing in parallel over a 500mmx500mm flat heater surface is U= 19 m/s and the inlet velocity temperature is T_∞15 C. The surface temperature of this plate is T_s140 C, the friction force is F_D=0.4 N and the surface area of the plate is A=0.32 m2. According to this;(F_D= 0.4N A=32 m2)a) Surface shear stressb) Find the coefficient of frictionc) Heat transfer coefficientd) What is the amount of heat transfer (electric power) that must be given to maintain a constant surface temperature?Topic: Heat transfer Completely solve and box the final answer. 6. 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. What is the heat absorbed by the water?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:
- 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.Q: Air enters a rectangular duct. Determine the exit temperature of the air and find the rate of heat transfer loss . Taking k = 0.02662 W/m."C. v= 1.702x10 m'/s, Pr 0.7255, C-1007 J/kg. C ,p=1.127 kg/m u= 2.325 kg/m.s Ans : 34.2°C 3776 W Air dact 15 em 2 em L7m Q. Hot air enters a sheef metal duct located in a basement. Determine200 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. %3D
- Answer this ASAP The diameter of the tube is 25 mm. The specific heat of water is 4.18 kJ/kg.°C. The overall heat transfer coefficient is 0.7 kW/m².°C. 1. Schematic of temperature distribution 2.ΔTLMTD 3.Actual heat transfer rate 4.Cmin 5.Maximum heat transfer rateWe would like to develop an empirical correlation to determine the heat trans- fer coefficient, h, for turbulent flow in a circular conduit. Please use the order provided for the lists of physical variables and fundamental units in working this problem. The following physical variables are to be included: h, average fluid velocity v, density ρ, viscosity μ, thermal conductivity k, specific heat capacity c, diameter D, and length L. (a) Express each physical variable in terms of fundamental units mass (m), length (l), time (t), and temperature (θ).Steam at 200 psia and 500°F flows at 100 fps in a 4 inches pipe inside diameter. What is the surface coefficient on the inside of the pipe if the thermal conductivity is 0.255 Btu-in/ft2-hr-°R, Cp = 0.559 Btu/lbs-°R, absolute viscousity is 1.2 x 10-5 lbs/ft-sec and specific volume is 2.725 ft3/lbs. Show your complete solution.
- A 4.5 in (inside diameter), 4.9 in (outside diameter) tube carries dry saturated steam at 10 bar. Assume that the interior temperature of the tube is the same as that of the steam. The outside air temperature is 25°C. For ksteel = 51.9 W/(m K) and hair = 13.0 W/(m2K). a) How much energy is lost, in kWh, in a 20 m long section of pipe during an 8-hoursWhat is the friction factor (to three decimal places) of the flow of air (density 1.2 kg/m³, viscosity 1.7 x 10-5 kg/ms) through a smooth pipe of diameter 0.1m at a mean flow speed of 1m/s.The 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