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1. A very smooth flat plate of length L-1 m and width b 3 m is immersed parallel to a stream of velocity 2 m/s. For both air and water as the working fluids [5 marks] Show that the flow is completely...
1. A very smooth flat plate of length L = 0.5 m and width b =...
1. A very smooth flat plate of length L = 0.5 m and width b = 2 m is immersed parallel to a stream of velocity 2 m/s. For both air and water as the working fluids; a. Show that the flow is completely laminar over the entire plate. (5 marks] b. Determine the drag force on one side of the plate. [4 marks] c. Determine the thicknesses , 8*, and at the end of the plate (x = L)....
Consider air flows with velocity of U?=U= 10 m/s over a semi-finite smooth flat plate with...
Consider air flows with velocity of U?=U= 10 m/s over a
semi-finite smooth flat plate with L=97 cm long. Calculate the
followings by assuming ? = 1.568 x 10-5 m2/s and ?=1.177
kg/m3.
Figure 1 : Boundary layer over a flat plate
Consider air flows with velocity of U?=U=10 m/s over a
semi-finite smooth flat plate with L=97 cm long. Calculate the
followings by assuming ? = 1.568 x 10-5 m2/s and ?=1.177
kg/m3.
b) Under some flow and boundary...
Problem 1: Air at 100 degrees Celsius, 1 atm and a free stream velocity of 5...
Problem 1: Air at 100 degrees Celsius, 1 atm and a
free stream velocity of 5 m/s flows over a 3 meter long, thin, flat
plate of naphthalene, causing it to sublime...
Please answer all parts
Problem 1. (20 Points) Air at 100°C, 1 atm, and a free-stream velocity of 5 m/s flows over a 3- m-long, thin, flat plate of naphthalene, causing it to sublime. (a) Determine the length over which a laminar boundary layer persists. (b) For that...
Air at T=25°C and pressure P=1 bar flows over a square plate with a velocity V=1...
Air at T=25°C and pressure P=1 bar flows over a square plate with a velocity V=1 m/s. This plate has a length L= 1 m and it is heated over its entire length; the plate temperature is constant Tp=100°C. The following data are given. For air: dynamic viscosity: mu = 1.9*10–5 kg/(m.s); density: rho = 1.05 kg/m3; conductivity k = 0.03 W/(m K); Specific heat Cp = 1.007 kJ/(kg K); Prandtl number Pr = 0.7 For laminar flow over a...
Air at 25 °C and 1 atm is flowing over a long flat plate with a...
Air at 25 °C and 1 atm is flowing over a long flat plate with a velocity of 8 m/s. (a) Determine the distance from the leading edge of the plate where the flow becomes turbulent. (b) What will be the boundary layer thickness at the end of the plate? (c) If the plate is a 2m by 2 m square, what will be the friction drag acting on the plate? Schematic Given ssumptions Find v=8m/s xcr ,FD ,δ@x=L L-2m...
Exercise 2 Air at 20 °C and 1 atm flows over a flat plate at 50...
Exercise 2 Air at 20 °C and 1 atm flows over a flat plate at 50 m/s. The plate is 300 cm long and is maintained at 60C. The width of the plate is 2 m. The critical Rec = 5 x 105 The properties are Conductivity k = 0.0263 W/mK, kinematic viscosity nu = v = 15.89 x 10-6 m²/s, Prandtl number is Pr=0.707 Density rho = p = 1.128 kg/m3 1. Determine the critical length Xc 2. Determine...
4) Air at 101 kPa and 360 K flows at 15 m/s over a flat plate...
4) Air at 101 kPa and 360 K flows at 15 m/s over a flat plate maintained at 300 K Assume that the transition Reynolds number is 5x10 (0.332R 12Pr1/3 Re < 5 x 105 0.029Repr0:43 5 x 105 < Re <3 x 107 Assume that k-0.03 W/( mK), 20x10* m?ls, Pr-0.7.p=1.16 kg/m a) If the plate is 2 m long, sketch the local heat transfer coefficient over the plate. Specify the functional form of h with respect tox b)...
QUESTION 2A (11 marks) [Allow 13 minutes] Water flows over a stationary, smooth, flat rectangular plate with dimensions 0.4 x 0.25m as shown in the figure below. The plate has its long axis parallel...
QUESTION 2A (11 marks) [Allow 13 minutes] Water flows over a stationary, smooth, flat rectangular plate with dimensions 0.4 x 0.25m as shown in the figure below. The plate has its long axis parallel to the direction of flow 0.4 m U1 m/s 0.25 m Answer the questions below where the properties of the water are (p 1000 kg/m, v 106 m2/s): a) Determine the nature of the boundary layer over the plate if the approach velocity of the water,...
Air of 15 °C and 1.0 atm and is moving with a uniform velocity of 15.2 m/s and this flow is laminar. Then, a thin sheet...
Air of 15 °C and 1.0 atm and is moving with a uniform velocity of 15.2 m/s and this flow is laminar. Then, a thin sheet of naphthalene 0.254 cm thick and 10.2 cm square is placed in the air stream parallel to the direction of flow (air flows above and below the sheet). For how long, in hours, must the sheet be exposed to the air stream before one-tenth of its mass will have sublimed? Assume the upper and...
Consider liquid water flowing over a flat plate of length L = 1 m. The water has the following properties: ρ-1000 kg/m3, Cp-4000 J/kgK. 10 3 kg/ ms, k 0.6 W/m . C μ Midway through the plate at x...
Consider liquid water flowing over a flat plate of length L = 1 m. The water has the following properties: ρ-1000 kg/m3, Cp-4000 J/kgK. 10 3 kg/ ms, k 0.6 W/m . C μ Midway through the plate at x = 0.5 m, you measure a heat flux to the surface of: 05 m 3181 W/m2 You also measure an average heat flux to the surface over the length of the plate of: "4500 W/m2 Knowing the latter, and knowing...
1. A very smooth flat plate of length L = 0.5 m and width b = 2 m is immersed parallel to a stream of velocity 2 m/s. For both air and water as the working fluids; a. Show that the flow is completely laminar over the entire plate. (5 marks] b. Determine the drag force on one side of the plate. [4 marks] c. Determine the thicknesses , 8*, and at the end of the plate (x = L)....
Problem 1: Air at 100 degrees Celsius, 1 atm and a
free stream velocity of 5 m/s flows over a 3 meter long, thin, flat
plate of naphthalene, causing it to sublime...
Please answer all parts
Problem 1. (20 Points) Air at 100°C, 1 atm, and a free-stream velocity of 5 m/s flows over a 3- m-long, thin, flat plate of naphthalene, causing it to sublime. (a) Determine the length over which a laminar boundary layer persists. (b) For that...
Air at 25 °C and 1 atm is flowing over a long flat plate with a velocity of 8 m/s. (a) Determine the distance from the leading edge of the plate where the flow becomes turbulent. (b) What will be the boundary layer thickness at the end of the plate? (c) If the plate is a 2m by 2 m square, what will be the friction drag acting on the plate? Schematic Given ssumptions Find v=8m/s xcr ,FD ,δ@x=L L-2m...
Exercise 2 Air at 20 °C and 1 atm flows over a flat plate at 50 m/s. The plate is 300 cm long and is maintained at 60C. The width of the plate is 2 m. The critical Rec = 5 x 105 The properties are Conductivity k = 0.0263 W/mK, kinematic viscosity nu = v = 15.89 x 10-6 m²/s, Prandtl number is Pr=0.707 Density rho = p = 1.128 kg/m3 1. Determine the critical length Xc 2. Determine...
4) Air at 101 kPa and 360 K flows at 15 m/s over a flat plate maintained at 300 K Assume that the transition Reynolds number is 5x10 (0.332R 12Pr1/3 Re < 5 x 105 0.029Repr0:43 5 x 105 < Re <3 x 107 Assume that k-0.03 W/( mK), 20x10* m?ls, Pr-0.7.p=1.16 kg/m a) If the plate is 2 m long, sketch the local heat transfer coefficient over the plate. Specify the functional form of h with respect tox b)...
QUESTION 2A (11 marks) [Allow 13 minutes] Water flows over a stationary, smooth, flat rectangular plate with dimensions 0.4 x 0.25m as shown in the figure below. The plate has its long axis parallel to the direction of flow 0.4 m U1 m/s 0.25 m Answer the questions below where the properties of the water are (p 1000 kg/m, v 106 m2/s): a) Determine the nature of the boundary layer over the plate if the approach velocity of the water,...
Air of 15 °C and 1.0 atm and is moving with a uniform velocity of 15.2 m/s and this flow is laminar. Then, a thin sheet of naphthalene 0.254 cm thick and 10.2 cm square is placed in the air stream parallel to the direction of flow (air flows above and below the sheet). For how long, in hours, must the sheet be exposed to the air stream before one-tenth of its mass will have sublimed? Assume the upper and...
Consider liquid water flowing over a flat plate of length L = 1 m. The water has the following properties: ρ-1000 kg/m3, Cp-4000 J/kgK. 10 3 kg/ ms, k 0.6 W/m . C μ Midway through the plate at x = 0.5 m, you measure a heat flux to the surface of: 05 m 3181 W/m2 You also measure an average heat flux to the surface over the length of the plate of: "4500 W/m2 Knowing the latter, and knowing...
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