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Consider How over a flat plate for which it is desired to determine the average heat...
Air flows with a velocity of 20 m/s over a flat plate of length 2 m....
Air flows with a velocity of 20 m/s over a flat plate of length 2 m. The air properties are k = 0.030 W/mK, V = 20.92 x 10-6 m/s, Pr=0.700. a. What type(s) of flow (laminar/turbulent) exist on this plate? b. If the following relations are given for the laminar and turbulent local convection coefficients over the plate, haminar (x) = 20 houwbudemo (x) = .52 where x is the distance from the plate leading edge. Find the average...
8) Air flows over a flat plate at a velocity of 20 m/s and a temperature...
8) Air flows over a flat plate at a velocity of 20 m/s and a temperature of 20C. The surface temperature of the plate is 134C, and the length of the plate in the direction of flow is 1.5 m. Properties of air may be taken as A-0.030 W/m-C, Pr-0.700, and a/p 2.092E-5 m/s (5% ) What is the location from the leading edge, X, where the flow becomes turbulent Re (20)15 a l Ve30s T20 T LaLS 523 m...
6.4 For laminar flow over a flat plate, the local heat trans- fer coefficient h, is known to vary as x72, where x i...
6.4 For laminar flow over a flat plate, the local heat trans- fer coefficient h, is known to vary as x72, where x is the distance from the leading edge (x = 0) of the plate. What is the ratio of the average coefficient between the leading edge and some location x on the plate to the local coefficient at x? -1/2
6.4 For laminar flow over a flat plate, the local heat trans- fer coefficient h, is known to...
1. For laminar flow over a flat plate, the local heat transfer coefficient, hx, is known to vary as hx~Cx-12 where C is...
1. For laminar flow over a flat plate, the local heat transfer coefficient, hx, is known to vary as hx~Cx-12 where C is a constant and x is the distance from the leading edge (x-0) of the plate. What is the ratio of the average coefficient between the leading edge and some location x on the plate (h,) to the local coefficient at x (h)? (15%)
1. For laminar flow over a flat plate, the local heat transfer coefficient, hx,...
For laminar flow over a flat plate, the local heat transfer coefficient hx =x-1/2 where x...
For laminar flow over a flat plate, the local heat transfer coefficient hx =x-1/2 where x is the distance from the leading edge (x-0) of the plate. What is the average heat transfer coefficient from the leading edge to location x
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)...
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...
Consider 2 thin, flat plates (Plate 1 and Plate 2 shown below) with air flowing over...
Consider 2 thin, flat plates (Plate 1 and Plate 2 shown below) with air flowing over them with a speed of 6 m/s. Plate 1 is 10 cm by 20 cm and Plate 2 is 30 cm by 20 cm. What is the ratio of the drag coefficient of Plate 2 to the drag coefficient of Plate 1 (Coz/Cp)? Take the critical Reynolds number for transition from laminar to turbulent flow to be 1,000,000. The kinematic viscosity of air (v...
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...
The velocity profile for a turbulent boundary layer over a flat plate is to be approximated...
The velocity profile for a turbulent boundary layer over a flat plate is to be approximated by the expression и an"* +b7072 where n=y/8 U a) (10P) Evaluate the coefficients a and b b) (20P) Obtain an expression for 8/x c) (5P) Obtain an expression for shear stress coefficient Cf. d) (5P) Draw velocity profile precisely.
Air flows with a velocity of 20 m/s over a flat plate of length 2 m. The air properties are k = 0.030 W/mK, V = 20.92 x 10-6 m/s, Pr=0.700. a. What type(s) of flow (laminar/turbulent) exist on this plate? b. If the following relations are given for the laminar and turbulent local convection coefficients over the plate, haminar (x) = 20 houwbudemo (x) = .52 where x is the distance from the plate leading edge. Find the average...
8) Air flows over a flat plate at a velocity of 20 m/s and a temperature of 20C. The surface temperature of the plate is 134C, and the length of the plate in the direction of flow is 1.5 m. Properties of air may be taken as A-0.030 W/m-C, Pr-0.700, and a/p 2.092E-5 m/s (5% ) What is the location from the leading edge, X, where the flow becomes turbulent Re (20)15 a l Ve30s T20 T LaLS 523 m...
6.4 For laminar flow over a flat plate, the local heat trans- fer coefficient h, is known to vary as x72, where x is the distance from the leading edge (x = 0) of the plate. What is the ratio of the average coefficient between the leading edge and some location x on the plate to the local coefficient at x? -1/2
6.4 For laminar flow over a flat plate, the local heat trans- fer coefficient h, is known to...
1. For laminar flow over a flat plate, the local heat transfer coefficient, hx, is known to vary as hx~Cx-12 where C is a constant and x is the distance from the leading edge (x-0) of the plate. What is the ratio of the average coefficient between the leading edge and some location x on the plate (h,) to the local coefficient at x (h)? (15%)
1. For laminar flow over a flat plate, the local heat transfer coefficient, hx,...
For laminar flow over a flat plate, the local heat transfer coefficient hx =x-1/2 where x is the distance from the leading edge (x-0) of the plate. What is the average heat transfer coefficient from the leading edge to location x
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)...
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...
Consider 2 thin, flat plates (Plate 1 and Plate 2 shown below) with air flowing over them with a speed of 6 m/s. Plate 1 is 10 cm by 20 cm and Plate 2 is 30 cm by 20 cm. What is the ratio of the drag coefficient of Plate 2 to the drag coefficient of Plate 1 (Coz/Cp)? Take the critical Reynolds number for transition from laminar to turbulent flow to be 1,000,000. The kinematic viscosity of air (v...
The velocity profile for a turbulent boundary layer over a flat plate is to be approximated by the expression и an"* +b7072 where n=y/8 U a) (10P) Evaluate the coefficients a and b b) (20P) Obtain an expression for 8/x c) (5P) Obtain an expression for shear stress coefficient Cf. d) (5P) Draw velocity profile precisely.
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