Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN: 9781305387102
Author: Kreith, Frank; Manglik, Raj M.
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 6, Problem 6.2P
A mercury-in-glass thermometer at
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A 2-cm diameter, 10-m long tube transports water at an average flow velocity of 8 m/s. The water
enters at 20°C and leaves at 30°C. To compute for the Nusselt number of the water flow, what is the
exact value of the temperature in °C on which the water properties should be based?
A heat treat steel plate measures 3 m *1 m and is initially at 30 degree Celsius. It is cooled by blowing air parallel to 1 m edge at 9 km/hr. If the air is at 10 degree Celsius. Estimate the convective heat transfer from both sides of the plate.
Air at 20 ◦ C flows inside a pipe 18-mm-ID having a uniform heat flux of 150 W/m 2 on the surface, the average flow velocity at entry being 1.0 m/s. The air pressure is 2 bar. Determine the value of convection coefficient. If the pipe is 2.5 m long, determine the air exit temperature and the wall temperature at the exit. Assume fully developed hydrodynamic boundary layer.
Chapter 6 Solutions
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Atmospheric air at 5°C enters a thin walled 12cm diameter 20m long isothermal pipe (T=constant) at a velocity of 2.5m/s and leaves at 19°C. Estimate the surface temperature T3. Ts Air 5°C 12 cm 19°C 2.5 m/s 20 marrow_forwardAir (pressure 1 atm) enters a circular pipe 5 cm in diameter at 20 °C with an average speed of 5 m/s. The tube wall is maintained at a constant surface temperature of 160°C, and the mean outlet temperature is 80°C. Estimate the length of the tube. Mainly, I also need the solution from concepts of how the heat flow behaves in the system, it can be with a diagram.arrow_forwardConsider two cases involving parallel flow of dry air at V = 4.5 m/s, T, = 45°C, and atmospheric pressure over an isothermal plate at T = 20°C. In the first case, Re= 5x 105, while in the second case the flow is tripped to a turbulent state atx = 0 m. At whatx -location, in m, are the thermal boundary layer thicknesses of the two cases equal? What are the local heat fluxes, in W/m?, at this location for the two cases? x = i m Jam i W/m? i W/m? I turbarrow_forward
- Forced air at T0 = 25°C and V = 17 m/s is used to cool electronic elements on a circuit board. One such element is a chip, 4 mm x 4 mm, located 129 mm from the leading edge of the board. Experiments have revealed that flow over the board is disturbed by the elements and that convection heat transfer is correlated by an expression of the form Nuz = 0.04RE0.85 Pr3 V, T. Chip Board L mm Estimate the surface temperature of the chip if it is dissipating 38 mW.arrow_forwardWater flow in steel pipe at a temperature of 50o C as shown in the figure. The pipe is wrapped with thermal isolation. Air is flowing over the pipe at a temperature of -5o C and a speed of 3 m/sec. It is known that 1kWh costs 0.05$ Find the daily cost of the heat losses per meter without the pipe isolation? What is the daily cost saving when using the isolation?arrow_forwardWater at 20 C flows in a smooth pipe 0.04 m indiameter at a Reynolds number of 50,000. Thewall temperature is maintained at 25C. The bulk temperature and film temperature are assumed to be at 20C. Using Colburn analogy find the value of heat transfer coefficient. The properties of water are: Density = 999 kg/m3; viscosity = 1 cp; Pr = 6.94; Specific heat 4182 K/kgK; k=0.603 W/mKarrow_forward
- i need the answer quicklyarrow_forwardA steam reservoir is covered by a rectangular plate (its length is 1 m and width 2 m). The steam temperature is 95o C, and it is in contact with the plate. Over the outside surface of the plate, water is flowing at a speed of 3 m/sec at a temperature of 25o C. What is the mean Nusselt number over the plate? What is the mean heat transfer convective coefficient over the plate? What is the heat transfer rate to the water?arrow_forwardOutside air ( v =15.89 x 10-6 m²/s, p= 1.16 kg/m³, Pr=0.707, k=0.0263 W/mK) with temperature of T-12 °C flows over a flat glass window (kglass=1.05W/mK) with L=0.5m lengtl the air velocity is measured as U=1.25 m/s and the glass thickness is t= 50 mm, calculate: 1. Reynolds number at the glass edge (i.e. point A)-Is the flow laminar or turbulent? 2. Average shear stress on outer surface of the glass 3. Velocity boundary layer thickness at the glass edge (point A) 4. Average convective heat transfer coefficient on outer surface of the glass Aarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning
Principles of Heat Transfer (Activate Learning wi...
Mechanical Engineering
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Cengage Learning
Heat Transfer – Conduction, Convection and Radiation; Author: NG Science;https://www.youtube.com/watch?v=Me60Ti0E_rY;License: Standard youtube license