use table A-15 kinematic viscosity
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use table A-15 kinematic viscosity
6. Consider a 2-m long smooth cylindrical pipe of 5 cm...
4. (25 pts) Water is flowing inside a thin wall, smooth pipe of diameter 0.05 m...
4. (25 pts) Water is flowing inside a thin wall, smooth pipe of diameter 0.05 m at a mass flowrate of 0.3 kg/s. The water enters the pipe at a mean temperature Tm,i= 80 °C and exits at Tm,o= 80 °C while the pipe surface temperature is maintained at Ts= 20 °C along its entire length. a. Is the flow turbulent or laminar? b. Calculate the average convection heat transfer coefficient inside the tube. c. Calculate the length of the...
table A-13 heat transfer book Consider a thin plate of 20 cm by 20 cm is...
table A-13 heat transfer book
Consider a thin plate of 20 cm by 20 cm is standing vertically in air. One side of the plate is insulated. The plate surface temperature is 50°C. The room air temperature where the plate is located is 20'C. Determine: (a) Is the flow laminar or turbulent? (b) What Nu number correlation will you use to find h? Find Nu. (C) Find the convection heat transfer coefficient (h) (d) Find the rate of convection heat...
(40 points) Engine oil flows at a rate of 1 kg/s through a 5-mm diameter smooth straight tube. Th...
(40 points) Engine oil flows at a rate of 1 kg/s through a 5-mm diameter smooth straight tube. The oil has an inlet temperature of 47°C and it is desired to heat the oil to a mean temperature of 87°C at the exit of the tube. The surface of the tube is maintained at 150°C. Assuming the flow is fully developed both hydrodynamically and thermally, determine the required length of the tube. Note: by calculating Reynolds number at the entrance...
7. Consider a thin plate of 20 cm by 20 cm is standing vertically in air....
7. Consider a thin plate of 20 cm by 20 cm is standing vertically in air. One side of the plate is insulated. The plate surface temperature is 50°C. The room air temperature where the plate is located is 20°C. Determine: (a) Is the flow laminar or turbulent? (b) What Nu number correlation will you use to find h? Find Nu. (c) Find the convection heat transfer coefficient (h) (d) Find the rate of convection heat transfer from the plate.
Consider a 30 m long pipe with a diameter of 1 cm and with a smooth interior wall surface. The pipe wall temperat...
Consider a 30 m long pipe with a diameter of 1 cm and with a smooth interior wall surface. The pipe wall temperature is kept constant at 60 C. (a) Some liquid enters the pipe with a tempera- ture of 20° C and exits the pipe with a mix- ing cup (bulk) temperature of 57°C. Know- ing that the mass flow rate of the liquid is of 0.015 kg/s, that the liquid density is of 1000 kg/m 3, that the...
2(a) A luid with kinematic viscosity 1.45x10* m'ls enters a smooth pipe of internal diameter d-...
2(a) A luid with kinematic viscosity 1.45x10* m'ls enters a smooth pipe of internal diameter d- 25 mm and length L-5 m. i) Sketch the velocity profile across a diameter of the pipe at 0, 1, 2, 3 and 4 m from the pipe entrance for U- 1 m/s (you may assume that the pipe has a bell mouth entrance for smooth unseparated flow entry). Also sketch a graph of the centre-line velocity Uma against the distance x measured from...
EMERGENCY. please reply fast 7- A pipe of 120 mm internal diameter 2.2 m long carries thermally an hydrodynamical fully developed flow at 1 is maintained at a temperature of go c temperature of th...
EMERGENCY. please reply fast
7- A pipe of 120 mm internal diameter 2.2 m long carries thermally an hydrodynamical fully developed flow at 1 is maintained at a temperature of go c temperature of the fluid reaches 50'C. Case b) Find roughness is o.26 mm and your findings. 21.5 kg/s. The pipe is smooth and Case a) Find h where the bulk the fluid temperature reaches 5o'С. Discuss nended in quiescent air Aihat
7- A pipe of 120 mm internal...
2. (30 points) Consider a smooth circular cylinder with a diameter of d = 5 m...
2. (30 points) Consider a smooth circular cylinder with a diameter of d = 5 m invested by air flow with velocity V. = 12 Wind tunnel experiments measured the vortex shedding frequency to be equal to f = 0.65 Hz and a drag force per unit length equal to F) = 330.75 a. Calculate the respective Strouhal number and drag coefficient. b. How much is the Strouhal number in case the incoming velocity is increased to 20 m/s? The...
u. 107 y. 10° Q.10 (kg/m) 0.9950 (kJ/kg.K) 1.009 (N.s/m?) 208.2 (mʻ/s) 20.92 k. 10 (W/m.K)...
u. 107 y. 10° Q.10 (kg/m) 0.9950 (kJ/kg.K) 1.009 (N.s/m?) 208.2 (mʻ/s) 20.92 k. 10 (W/m.K) 30.0 (m²/s) 29.9 Pr 0.700 Air at p = latm enters a thin-walled long tube at an inlet temperature of Tmi = 100 °C. The diameter and length of the tube are 5 mm and 2 m respectively. A constant heat flux is applied to the air from the tube surface. The air mass flow rate is ṁ = 135 x 10-kg/s. (a) Is...
1. Is the floe within the pipe turbulent or laminar? Justify your answer 2. What is the average N...
1. Is the floe within the pipe turbulent or laminar? Justify
your answer
2. What is the average Nusselt number and heat transfer
coefficient in the pipe? You can assume that the flow is fully
developed
3. What length of pipe is required to achieve the desired exit
temperature?
4. Was your assumption of fully developed flow justified?
Explain why or why not. How much error did this assumption
introduce into calculation of nusselt number? Do you need more or...
4. (25 pts) Water is flowing inside a thin wall, smooth pipe of diameter 0.05 m at a mass flowrate of 0.3 kg/s. The water enters the pipe at a mean temperature Tm,i= 80 °C and exits at Tm,o= 80 °C while the pipe surface temperature is maintained at Ts= 20 °C along its entire length. a. Is the flow turbulent or laminar? b. Calculate the average convection heat transfer coefficient inside the tube. c. Calculate the length of the...
table A-13 heat transfer book
Consider a thin plate of 20 cm by 20 cm is standing vertically in air. One side of the plate is insulated. The plate surface temperature is 50°C. The room air temperature where the plate is located is 20'C. Determine: (a) Is the flow laminar or turbulent? (b) What Nu number correlation will you use to find h? Find Nu. (C) Find the convection heat transfer coefficient (h) (d) Find the rate of convection heat...
(40 points) Engine oil flows at a rate of 1 kg/s through a 5-mm diameter smooth straight tube. The oil has an inlet temperature of 47°C and it is desired to heat the oil to a mean temperature of 87°C at the exit of the tube. The surface of the tube is maintained at 150°C. Assuming the flow is fully developed both hydrodynamically and thermally, determine the required length of the tube. Note: by calculating Reynolds number at the entrance...
7. Consider a thin plate of 20 cm by 20 cm is standing vertically in air. One side of the plate is insulated. The plate surface temperature is 50°C. The room air temperature where the plate is located is 20°C. Determine: (a) Is the flow laminar or turbulent? (b) What Nu number correlation will you use to find h? Find Nu. (c) Find the convection heat transfer coefficient (h) (d) Find the rate of convection heat transfer from the plate.
Consider a 30 m long pipe with a diameter of 1 cm and with a smooth interior wall surface. The pipe wall temperature is kept constant at 60 C. (a) Some liquid enters the pipe with a tempera- ture of 20° C and exits the pipe with a mix- ing cup (bulk) temperature of 57°C. Know- ing that the mass flow rate of the liquid is of 0.015 kg/s, that the liquid density is of 1000 kg/m 3, that the...
2(a) A luid with kinematic viscosity 1.45x10* m'ls enters a smooth pipe of internal diameter d- 25 mm and length L-5 m. i) Sketch the velocity profile across a diameter of the pipe at 0, 1, 2, 3 and 4 m from the pipe entrance for U- 1 m/s (you may assume that the pipe has a bell mouth entrance for smooth unseparated flow entry). Also sketch a graph of the centre-line velocity Uma against the distance x measured from...
EMERGENCY. please reply fast
7- A pipe of 120 mm internal diameter 2.2 m long carries thermally an hydrodynamical fully developed flow at 1 is maintained at a temperature of go c temperature of the fluid reaches 50'C. Case b) Find roughness is o.26 mm and your findings. 21.5 kg/s. The pipe is smooth and Case a) Find h where the bulk the fluid temperature reaches 5o'С. Discuss nended in quiescent air Aihat
7- A pipe of 120 mm internal...
2. (30 points) Consider a smooth circular cylinder with a diameter of d = 5 m invested by air flow with velocity V. = 12 Wind tunnel experiments measured the vortex shedding frequency to be equal to f = 0.65 Hz and a drag force per unit length equal to F) = 330.75 a. Calculate the respective Strouhal number and drag coefficient. b. How much is the Strouhal number in case the incoming velocity is increased to 20 m/s? The...
u. 107 y. 10° Q.10 (kg/m) 0.9950 (kJ/kg.K) 1.009 (N.s/m?) 208.2 (mʻ/s) 20.92 k. 10 (W/m.K) 30.0 (m²/s) 29.9 Pr 0.700 Air at p = latm enters a thin-walled long tube at an inlet temperature of Tmi = 100 °C. The diameter and length of the tube are 5 mm and 2 m respectively. A constant heat flux is applied to the air from the tube surface. The air mass flow rate is ṁ = 135 x 10-kg/s. (a) Is...
1. Is the floe within the pipe turbulent or laminar? Justify
your answer
2. What is the average Nusselt number and heat transfer
coefficient in the pipe? You can assume that the flow is fully
developed
3. What length of pipe is required to achieve the desired exit
temperature?
4. Was your assumption of fully developed flow justified?
Explain why or why not. How much error did this assumption
introduce into calculation of nusselt number? Do you need more or...
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