Q1/ Consider the following fluids, each with a velocity of u = 9 m/s and a temperature of10°C, in cross flow over a 10-mm diameter cylinder maintained at 50°C. Calculate the rateof heat transfer per unit length for saturated water?***** 2SatuDetyPP Liquid3149 99204.246 996.0528 90407.354 902.1393 9901Nu 0.3+1Endalay SpecificHealVeputation0.62 Re2 Pro[1 + (0.4/Pypa[1+ (282,000)aper0.02312402 41800030443780.0397 2419 41780.0612 2407 417900655 2335 4180treeThermalCoductivityTHAYLiquid Vapor LeDynamic Vacosity1870VaporLiquid0607 0.0186 0110 0.907101875 0615 0.0169 0.796 101 1001101880 BAZ3 0.0192 0720x10 1016 101825 0.631 0.5196 0653x10 1031501832 0437 0.0000 0596x10104610Franwww.LignonA'INLigad Vaper614 1.00 0.24710542 100 0234-104.83 1.00 0.337x104.32 100 0377x10191 100 0415-10

u=9m/s T∞=10oc D=10mm=0.01 m TS=50oc To find: Q˙conv

Q1/ Consider the following fluids, each with a velocity of u = 9 m/s and a temperature 10°C, in cross flow over a 10-mm diameter cylinder maintained at 50°C. Calculate the rate of heat transfer per unit length for saturated water? 12 ***** Sau Nu-0.3+ PAPP Liquie UN 3:149 9970 0.0231 2442 4.246 9960 569 5040 7.354 902.1 9.393 9901 4180 00304 2433 4178 0.0397 4178 0.0612 2407 4179 0055 4180 0.62 Re Pro 1+ [+(0.4/Pr Thermal Conductivly Re 282,000 sid Vapor L Vapor 1870 0607 60160830 6.987-10 1875 0415 089 0798104 100110 1880 AZS 60192 072010 101610 1825 6431 83 065310103810 0437 0.0000 096 101045×10 T F La Ver 6:4 1.00 0.247 10 542 1.00 0.234810 4.83 1.00 0.337 >10 4.32 1.00 0.377x10 391 100 0415-10

Q1/ Consider the following fluids, each with a velocity of u = 9 m/s and a temperature 10°C, in cross flow over a 10-mm diameter cylinder maintained at 50°C. Calculate the rate of heat transfer per unit length for saturated water? 12 ***** Sau Nu-0.3+ PAPP Liquie UN 3:149 9970 0.0231 2442 4.246 9960 569 5040 7.354 902.1 9.393 9901 4180 00304 2433 4178 0.0397 4178 0.0612 2407 4179 0055 4180 0.62 Re Pro 1+ [+(0.4/Pr Thermal Conductivly Re 282,000 sid Vapor L Vapor 1870 0607 60160830 6.987-10 1875 0415 089 0798104 100110 1880 AZS 60192 072010 101610 1825 6431 83 065310103810 0437 0.0000 096 101045×10 T F La Ver 6:4 1.00 0.247 10 542 1.00 0.234810 4.83 1.00 0.337 >10 4.32 1.00 0.377x10 391 100 0415-10

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.41P

See similar textbooks

Similar questions

Air at 22˚C and at atmospheric pressure flows over a flat plate at a velocity of 1.65 m/s. If the length of the plate is 2.179 m and its temperature is 98 ˚C, Calculate Heat rate by using exact and approximate methods both. What is the %age difference of the heat transfer rate values by these methods? Take width of the plate as unity. Properties given at 60˚C are as follows: Density: 1.058 kg/m3 , cp = 1.005 kJ/kg˚C, k= 0.02897 w/m˚C, Kinematic viscosity is 18.97 × 10-6 m2 /s
Q2/ An aluminum sphere weighting 7kg and initially at a temperature of 533K is suddenly immersed in a fluid at 283K. if heat transfer coefficient between the sphere and fluid is 50W/m?.°C. Take density=2707kg/m3, specific heat=0.9KJ/kg.ºC and thermal conductivity= 204W/m°C. Determine th Bi number and And determine the time required to cool sphere to 263k
Example(1-14): mixture gas and liquid flow through 0.02 m inside diameter pipe at total flow rate of 0.2 kg/s. if the gas weight fraction is 0.149 what is the pressure drop per unit length of pipe. Where the pipe roughness 0.00015 mm, liquid and gas viscosities are 2x103 pa.s and 1x10-5 pa.s respectively. finaly the liquid and gas densities are 1000 kg/m³ and 60 kg/m³ pa.s respectively.
Mass flow rate of hot fluid is 0.007 kg/s. Convection heat transfer coefficient of hot fluid stream is 1000 W/m?.°C. Thermophysical properties are given as follows. Hot fluid; c, = 5000 J/kg.°C Water; dynamic viscosity, µ = 0.001 Pa.s; Prandti number, Pr = 6.14; thermal conductivity, k = 0.607 W/m.°C; density, p = 1000 kg/m³; specific heat c, = 4200 J/kg.°C. Neglecting conduction resistance of the pipe, calculate heat exchanger effectiveness (ɛ), heat transfer rate (Q in J/s), outlet temperatures of the hot fluid (Thout) and water (Tw.out) for varying mass flow rate values of water provided below. Mass flow rate of water, m (kg/s) 0.0025 0.01 0.025 0.05 0.075 0.1 Plot heat exchanger effectiveness (ɛ), heat transfer rate (Q in J/s), outlet temperatures of the hot fluid (Thout) and water (Tw.out) as a function of water mass flow rate (m .). Comment on the results. Hot fluid in (65 °C) Water Water in (25 °C) out d = 0.5 cm Hot fluid out L= 5 m
Q) Glycerin at 10 degrees * C flows over a flat plate 6 m long, maintained at 30 degrees * C with a velocity of 1.5 m/s. Determine the total drag force and the heat transfer rate over the entire plate per unit width.
Topic: Heat transfer Completely solve and box the final answer. 1. A 20degC water flows to 50cmx60cm flat plate with velocity of 5.2m/s . The flat plate surface temperature is maintained at 40deg C. The air flows parallel to the 50cm side of the plate. If the kinematic viscosity of water is 78x10-8 m2/s, at what length the flow become turbulent?
Carbon dioxide at 300 K flows across one side of a flat plate at a velocity of 18 m/s. The plate measures 2.30 m in the direction of flow and 1.0 m wide. If the surface temperature is 400 K, find the convective heat transfer
Obtain by dimensional analysis a functional relationship for the wall heat transfer coefficient h (W/m2-K) for a fluid flowing through a straight pipe of circular cross section. Assume that the effects of natural convection may be neglected in comparison with those of forced convection. Taking the heat transfer coefficient, h, as a function of the fluid velocity, density, viscosity specific heat and thermal conductivity, v, p, H, Cp and k, respectively, and of the inside diameter of the pipe, d. For recurring set, the variables d, u, k, and p. It found by experiment that, when the flow is turbulent, increasing the flowrate by a factor of 2 always results in a 60 percent increase in the coefficient. How would a 50 percent increase in density of the fluid be expected to affect coefficient, all other variables remaining constant?
Question 1: A cylinder (20 mm in diameter and 100 mm long) is heated internally heater and is subjected to a cross flow of air in a low-speed wind tunnel. Air velocity and temperature were maintained at V= 20 m/s and 30 °C, respectively. The average cylinder surface temperature was determined to be T, = 130 °C. Using the correlation by Zukauskas, estimate the heat transfer rate per unit length? an electrical
Metallic cylinder 10 mm in diameter maintained at 50 °C with the engine oil fluid in a cross flow over the cylinder for which the air temperature To is 20°C and the velocity of 5 m/s (see Fig.) 1. What are the main assumptions? 2. Calculate the rate of heat transfer per unit length? 3. Discuss the above results? Engine Oil Ts = 50 °C Too = 20 °C D = 0.01 m U∞ = 5 m/s Thermophysical Properties of Oil Engine 2 T P Cp M-10² v.106 k-10³ (K) (kg/m³) (kJ/kg-K) a 10 (m²/s) B-10³ (K-¹) (N-s/m²) (m²/s) (W/m - K) Pr Engine Oil (Unused) 273 899.1 1.796 385 147 0.910 47,000 0.70 280 895.3 1.827 217 144 0.880 27,500 0.70 290 890.0 1.868 145 0.872 12,900 0.70 300 884.1 1.909 145 0.859 6400 0.70 310 877.9 1.951 145 0.847 3400 0.70 320 871.8 1.993 0.823 1965 0,70 330 865.8 2.035 8.36 96.6 0.800 1205 0.70 340 859.9 2.076 5.31 61.7 139 0.779 793 0.70 Convection Heat Transfer Correlations for External Flow Correlation Range of Applicability 5/8 4/5 0.62 Re2Pr1/3 ᏂᎠ k =0.3+ Rep 282,000 ReD Pr > 0.2 1/4…
Mass flow rate of hot fluid is 0.007 kg/s. Convection heat transfer coefficient of hot fluid stream is 1000 W/m?.°C. Thermophysical properties are given as follows. Hot fluid; c, = 5000 J/kg.°C Water; dynamic viscosity, u = 0.001 Pa.s; Prandti number, Pr = 6.14; thermal conductivity, k = 0.607 W/m.°C; density, p = 1000 kg/m?; specific heat c, = 4200 J/kg.°C. Neglecting conduction resistance of the pipe, calculate heat exchanger effectiveness (ɛ), heat transfer rate (Q in J/s), outlet temperatures of the hot fluid (Th,out) and water (Tw,out) for varying mass flow rate values of water provided below. Mass flow rate of water, m„ (kg/s) 0.0025 0.01 0.025 0.05 0.075 0.1 Plot heat exchanger effectiveness (8), heat transfer rate (Q in Jis), outlet temperatures of the hot fluid (Th,out) and water (Tw,.cut) as a function of water mass flow rate (m„.). Comment on the results. Hot fluid in (65 °C) Water Water in (25 °C) out d = 0.5 cm Hot fluid out L= 5 m
Mass flow rate of hot fluid is 0.007 kg/s. Convection heat transfer coefficient of hot fluid stream is 1000 W/m? °C. Thermophysical properties are given as follows. Hot fluid; c, = 5000 J/kg.°C Water; dynamic viscosity, u = 0.001 Pa.s; Prandtl number, Pr = 6.14; thermal conductivity, k = 0.607 W/m.°C; density, p = 1000 kg/m2; specific heat c, = 4200 J/kg.°C. Neglecting conduction resistance of the pipe, calculate heat exchanger effectiveness (ɛ), heat transfer rate (Q in J/s), outlet temperatures of the hot fluid (Th,out) and water (Tw.out) for varying mass flow rate values of water provided below. Mass flow rate of water, m (kg/s) 0.0025 0.01 0.025 0.05 0.075 0.1 Plot heat exchanger effectiveness (:), heat transfer rate (Q in J/s), outlet temperatures of the hot fluid (Thout) and water (Tw.out) as a function of water mass flow rate (m). Comment on the results. Hot fluid in (65 °C) Water Water in (25 °C) out d = 0.5 cm Hot fluid out L = 5 m