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Question 7 Boundary Layers (8 marks) Air at 20°C flows at 9 m/s past a thin...
RCES Problem 7.002 Engine oil at 100°C and a velocity of 0.20 m/s flows over both...
RCES Problem 7.002 Engine oil at 100°C and a velocity of 0.20 m/s flows over both surfaces of a 1-m-long flat plate maintained at 20°C 001 Determine: (a) The velocity and thermal boundary layer thicknesses at the trailing edge. (b) The local heat flux and surface shear stress at the trailing edge. (c) The total drag force and heat transfer per unit width of the plate. 02 Determine the velocity boundary layer thickness 6 at the trailing edge, in m....
Problem No-3: Air at 20 c(p-1.21kg/mH-38x107 kg.m/s) and with a free stream velocity o 40 m/s...
Problem No-3: Air at 20 c(p-1.21kg/mH-38x107 kg.m/s) and with a free stream velocity o 40 m/s flows past a smooth thin plate which is 3-m wide and 10-m long in the flow direction. turbulent boundary layer from the leading edge determine: (a) the boundary layer thickness 6 m from the leading edge (b) the drag coefficient and drag force exerted by the fluid on the thin plate Take density 1.2 kg/m3 and kinematic viscosity as 1.49 x 10-s m'/s: (12p)...
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...
A thin, flat plate of 0.6 m square is immersed in a parallel stream of air at atmospheric pressure and 15 ºC flowing at a velocity of 6 m/s. Neglect edge effects. a) Determine the drag force exerted o...
A thin, flat plate of 0.6 m square is immersed in a parallel stream of air at atmospheric pressure and 15 ºC flowing at a velocity of 6 m/s. Neglect edge effects. a) Determine the drag force exerted on the plate. b) Determine the boundary layer thickness and the local drag coefficient at a distance 0.3 m from the leading edge.
Problem 4 Air at 100 C flows across a thin, flat plate of subliming naphthalene that...
Problem 4 Air at 100 C flows across a thin, flat plate of subliming naphthalene that is 3.4 m long. The Reynolds number at the trailing edge of the plate is at the upper limit for a laminar boundary layer (Re 5e5). Estimate: (a) the average rate of sublimation in kmol/s*m2; and (b) the local rate of sublimation 0.5 m from the leading edge. Vapor pressure of naphthalene = 10 torr viscosity of air 0.0215 cP; molar density of air...
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 a temperature of 300 K flows over one side of a flat plate of...
Air at a temperature of 300 K flows over one side of a flat plate of width 1 m at a velocity of 20 m/s. The plate has a constant surface temperature of 350 K. Assume Re(x,c)=5x10^5. a) What is the velocity boundary layer thickness at the end of the plate if L=0.25 m? What if L=1 m? b) Calculate the drag on the plate if L=0.25 m. What is the drag if L=1 m? c) Find the heat transfer...
Air at 70℉ flows parallel to a smooth, thin, flat plate at 13 ns. The plate...
Air at 70℉ flows parallel to a smooth, thin, flat plate at 13 ns. The plate is 10 6 ft long Determine whether the boundary layer on the plate is most likely laminar, turbulent, or somewhere in between (transitional). Calculate the boundary layer thickness at the end of the plate where the boundary layer is laminar everywhere and where the boundary layer is turbulent everywhere (obtained from the one seventh-power law), The kinematic viscosity of air at 70°F is v...
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,...
Water at 15.6 [°C] (with kinematic viscosity of 1.12 [cSt]) flows over a flat plate generatinga boundary layer. The thickness of the boundary layer at 0.50 [m] from the leading edge is 6 [mm] (a)...
Water at 15.6 [°C] (with kinematic viscosity of 1.12 [cSt]) flows over a flat plate generatinga boundary layer. The thickness of the boundary layer at 0.50 [m] from the leading edge is 6 [mm] (a) Is the boundary layer laminar or turbulent at that point? (b) At what distance it becomes turbulent? (c) What is the layer thickness at that point?
Water at 15.6 [°C] (with kinematic viscosity of 1.12 [cSt]) flows over a flat plate generatinga boundary layer. The...
RCES Problem 7.002 Engine oil at 100°C and a velocity of 0.20 m/s flows over both surfaces of a 1-m-long flat plate maintained at 20°C 001 Determine: (a) The velocity and thermal boundary layer thicknesses at the trailing edge. (b) The local heat flux and surface shear stress at the trailing edge. (c) The total drag force and heat transfer per unit width of the plate. 02 Determine the velocity boundary layer thickness 6 at the trailing edge, in m....
Problem No-3: Air at 20 c(p-1.21kg/mH-38x107 kg.m/s) and with a free stream velocity o 40 m/s flows past a smooth thin plate which is 3-m wide and 10-m long in the flow direction. turbulent boundary layer from the leading edge determine: (a) the boundary layer thickness 6 m from the leading edge (b) the drag coefficient and drag force exerted by the fluid on the thin plate Take density 1.2 kg/m3 and kinematic viscosity as 1.49 x 10-s m'/s: (12p)...
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...
Problem 4 Air at 100 C flows across a thin, flat plate of subliming naphthalene that is 3.4 m long. The Reynolds number at the trailing edge of the plate is at the upper limit for a laminar boundary layer (Re 5e5). Estimate: (a) the average rate of sublimation in kmol/s*m2; and (b) the local rate of sublimation 0.5 m from the leading edge. Vapor pressure of naphthalene = 10 torr viscosity of air 0.0215 cP; molar density of air...
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 70℉ flows parallel to a smooth, thin, flat plate at 13 ns. The plate is 10 6 ft long Determine whether the boundary layer on the plate is most likely laminar, turbulent, or somewhere in between (transitional). Calculate the boundary layer thickness at the end of the plate where the boundary layer is laminar everywhere and where the boundary layer is turbulent everywhere (obtained from the one seventh-power law), The kinematic viscosity of air at 70°F is v...
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,...
Water at 15.6 [°C] (with kinematic viscosity of 1.12 [cSt]) flows over a flat plate generatinga boundary layer. The thickness of the boundary layer at 0.50 [m] from the leading edge is 6 [mm] (a) Is the boundary layer laminar or turbulent at that point? (b) At what distance it becomes turbulent? (c) What is the layer thickness at that point?
Water at 15.6 [°C] (with kinematic viscosity of 1.12 [cSt]) flows over a flat plate generatinga boundary layer. The...
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