2- Air (v = 1.8×10° m/s) flows along a flat plate with a velocity of 150 km/hr. How long does the plate have to be to obtain a laminar boundary layer thickness of 8 mm.
Q: Flow over flat plate has velocity and temperature distribution as, u (r, x) = C, and T (r, x) = C 2…
A:
Q: Wind loading is a primary consideration in the design of the supporting mechanisms of billboards, as…
A:
Q: 7. A flat plate has a length of 40 cm and width of 1 m. Air, at pressure of 2 atm, temperature of 57…
A:
Q: 1. What is Reynold's number? 2. State some practical examples of laminar and turbulent flow? 3.…
A: Flows with low Reynolds numbers tend to be laminar, while those with high Reynolds numbers tend…
Q: Consider a blimp that can be approximated as a 3-m diameter, 8-m long ellipsoid and is connected to…
A: Given data: Diameter of blimp, D= 3m Length of the blimp, L = 8m Buoyancy force, FB= 120 N Wind…
Q: Consider laminar boundary layer flow over a flat plate as shown in the figure (top view). Ignoring…
A:
Q: Problem 3. Air at 20°C and 1 atm (p= 1.2 kg/m³ and u= 1.8×105 kg/(m-s)) flows at 3 m/s past a sharp…
A: (a) Calculate the Reynolds's number. Re=ρvLμ=1.2311.8×10-5=2×105<5×105so flow is laminar
Q: Water flows at a velocity of 1.2 m/s over a flat plate 1.2 m long. Assume 1/7th power law and…
A:
Q: The boundary layer formed as turbulent around the sphere is when ReD = 2.5*10^5 (a) Golf…
A: Re= 2.5×105Golf ball diameter, Dg= 43 mm= 0.043 mSoccer ball diameter, Ds= 222 mm= 0.222 m Note:…
Q: Laminar Flat-Plate Boundary Layer: Exact Solution 9.6 Plot the Blasius solution for the laminar…
A: Given: The velocity profile equation,
Q: 3435 E1 (B) Air at 27°C flows over a flat plate with a velocity of 3 m/s. Calculate the boundary…
A:
Q: Use appropriate boundary conditions to evaluate the constants in the boundary layer velocity profile…
A: Suppose a fluid moving with a velocity 'u' in a viscous flow and whose vertical distance from the…
Q: d the thickness of the boundary layer at a distance of x = 20 c
A: Re @ x =20 cm Re = ρ Vxμ = Vxν= 5 * 0.21.995 x 10-5=50125.31328 < critical reynold snumber ,…
Q: What is the f (equivalent drag area) for an aircraft that creates 600 lbs of parasite drag at 10,000…
A: Write the density of air at an altitude of 10000 ft. ρ=0.0565 lbs/ft3
Q: Air at 15 °C flows at V = 5 m/s over a flat plate of length L= 6 m and width W = 2 m. Calculate the…
A: T0=15°C v=5 msecL=6 m w=2 m Surface of plate is smooth ρ=1.225 kgm3 and μ=1.81×10-5 Kgm-sec at…
Q: Derive an expression for turbulent boundary layer thickness over a flat plate
A: Given A turbulent flow in a flat plate To find Turbulent boundary layer expression
Q: A circular sign has a diameter of 50 cm and is subjected to normal winds up to 150 km/h at 10°C and…
A: The diameter of circular sign, D = 50 cm. Wind velocity, V = 150 km/h. Pressure applied on the…
Q: For flow along a flat plate with x being the distance from the leading edge, the boundary layer…
A: Step 1 The boundary layer thickness for flat plate is represented by the following expression:…
Q: During a winter day, wind at 55 km/h, 5°C, and 1 atm is blowing parallel to a 4-m-high and 10-m-long…
A: Given data velocity of wind 55 km/hr = 15.27 m/sec height of the wall h = 4m length of the wall L =…
Q: distance of 1 m from the leading edge of a flat plate, kept at zero angle of incidence to the flow…
A: Given:x1=1 mx4=4 mδ1=0.1 cm
Q: Dust particles of diameter 0.06 mm and density 1.6 g/cm are unsettled during high winds and rise to…
A:
Q: Explain boundary layer thickness?
A: Boundary layer thickness is described as a vertical distance from the boundary up to the point where…
Q: 7- Air flows over a horizontal smooth flat plate at speed 14.5 m/s. The plate length is 1.5 m and…
A:
Q: Water at a velocity of 1.0 m/s flows along the length of one side of a flat plate that is 2 meters…
A:
Q: 2- Oil with a free stream velocity of 2 m/s flows over a thin plate 2m wide and 2m long. Calculate…
A:
Q: On a flat plate; Explain the boundary layer thickness, displacement thickness and momentum thickness…
A: Boundary-Layer This condition says the fluid speed on the solid surface is the same as the surface…
Q: The sphere of diameter of 5.0 cm is moving in still water at a velocity of 2.0 m/s. The drag…
A:
Q: A circular sign has a diameter of 52 cm and is subjected to normal winds up to 160 km/h at 10°C and…
A: Given data as per question Diameter = 52 m Velocity of wind = 160 km /h = 44.4 m/s Temperature = 100…
Q: During a winter day, wind at 58 km/h, 5°C, and 1 atm is blowing parallel to a 3.5-m-high and…
A: Given : The velocity of the wind = 58 km/hr The temperature of the air T = 5°C The pressure of the…
Q: 2. Water flows at a velocity of 1.2 m/s over a flat plate 1.2 m long. Assume 1/7th power law and…
A:
Q: A commercial airplane has a total mass of 150,000 lbm and a wing planform area of 1700 ft2. The…
A: The densities of air are 1.20 kg/m3 on the ground and 0.312 kg/m3 at cruising altitude. The…
Q: A flat plate ( 1.5 m ) long and ( 1.5 m ) wide is towed in water ( ρ = 1000 kg/m3 and ν=1.31 * 10 -6…
A: Given data:
Q: b) A 4 m long and 2 m wide plate shown in Figure Q1(b) is positioned in seawater flowing at 1.5 m/s…
A:
Q: The velocity profile for a turbulent boundary layer over a flat plate is to be approximated by the…
A: The given velocity profile is – The two boundary conditions for boundary layer flow is – From…
Q: During a winter day, wind at 70 km/h, 5°C, and 1 atm is blowing parallel to a 4-m-high and 15-m-long…
A: Velocity of wind = 70 km/h = 19.444 m/s The pressure of the air = 1 atm Length of the wall = 15m…
Q: Water at 60° C flows over 2.5 cm square flat plate 90°C at a velocity of 4 m/s. 1- Calculate the…
A: NOTE:- Here properties of water and air is not mentioned so, I took these at Tavg. i.e. at 75oC…
Q: Explain the difference between a favorable and an adverse pressure gradient in a boundary layer. In…
A: Bulk flows are governed by the pressure gradient. The fluid will flow in direction of decreasing…
Q: is the drag coefficient 2 or 0.2?
A: Yes from figure we can see that drag coefficient at 80000 is 0.2 not 2
Q: A 30-cm-diameter smooth ball of dėnsity Ppall = 210 kg/m³ is tied to an object on the bottom of a…
A: Given: The diameter of smooth ball, d = 30 cm The density of ball, ρball = 210 kg/m^3 The density of…
Q: A flat plate ( 1.5 m) long and ( 1.5 m) wide is towed in water ( p 1000 kg/m and v=1.31 * 10 “m² /s)…
A:
Q: Light oil at 75°F flows over a 22-ft-long flat plate with a free-stream velocity of 6 ft/s.…
A: Given data: Length of plate, L = 22 ft Stream velocity, V = 6 ft/s Temperature, T = 75°F
Q: Show the boundary layer development along the plate and define the characteristics of boundary layer…
A: Given:
Q: (b) A smooth thin plate 10 m long and 1 m wide is placed in an air stream at 3 m/s with its length…
A: As per bartleby guidelines we are allowed to solve only 1st question if multiple questions are…
Q: Light oil at 75°F flows over a 17-ft-long flat plate with a free-stream velocity of 5 ft/s.…
A: Given Data⇒Light oil atT=75°F=297.039 KLenght of plateL=17 ftFree stream velocityv=5ftsProblem…
Q: Calculate the heat transfer from a 60 cm x 60 cm plate on which air flows at 40⁰C and. The plate…
A:
Step by step
Solved in 2 steps with 2 images
- Air at 1000C flows at an inlet velocity of 2 m/s between two parallel flat plates spaced 1 cm apart. Estimate the distance from the entrance to the point where the boundary layers meet.Air at 20 °C flows at V = 10 m/s over a flat plate of length L= 1.52 m and width W = 2 m.Calculate the boundary layer thickness at the trailing edge of plate and drag force on one sideof plate if:a. Surface of plate is smooth.b. Surface of plate is rough.The air properties at 20 °C are: Density, ? = 1.2 kg/m3and dynamic viscosity, ? = 1.8x 10-5kg/m·s and kinematic viscosity, ν = 1.516×10-5m2/s. kindly give me the solution of this problem with correct and logical reasoning.Air at 20 °C flows at V = 10 m/s over a flat plate of length L= 1.52 m and width W = 2 m.Calculate the boundary layer thickness at the trailing edge of plate and drag force on one sideof plate if:a. Surface of plate is smooth.b. Surface of plate is rough.The air properties at 20 °C are: Density, ? = 1.2 kg/m3and dynamic viscosity, ? = 1.8x 10-5kg/m·s and kinematic viscosity, ν = 1.516×10-5m2/s. I got the first solution which was wrong kindly solve it correctly
- Air at 20 °C flows at V = 10 m/s over a flat plate of length L= 1.52 m and width W = 2 m.Calculate the boundary layer thickness at the trailing edge of plate and drag force on one sideof plate if:a. Surface of plate is smooth.b. Surface of plate is rough.The air properties at 20 °C are: Density, ? = 1.2 kg/m3and dynamic viscosity, ? = 1.8x 10-5kg/m·s and kinematic viscosity, ν = 1.516×10-5m2/sAir at 20 °C flows at V = 10 m/s over a flat plate of length L= 1.52 m and width W = 2 m. Calculate the boundary layer thickness at the trailing edge of plate and drag force on one side of plate if: a. Surface of plate is smooth.b. Surface of plate is rough. The air properties at 20 °C are: Density, ? = 1.2 kg/m3 and dynamic viscosity, ? = 1.8 x 10^-5 kg/m·s and kinematic viscosity, ν = 1.516×10^-5 m2/s.Air flows parallel to a speed limit sign along the highway at speed V = 8.5 m/s. The temperature of the air is 25°C, and the width W of the sign parallel to the flow direction (i.e., its length) is 0.45 m. Is the boundary layer on the sign laminar or turbulent or transitional?
- We are testing a flat plate of length L = 1.125 m and width W = 0.225 m in a stream of air flowing with a velocity of 20 m/s. In test case 1, the air is flowing parallel to L and in test case 2 air is flowing parallel to W. Find: What portion of the boundary layer flow is laminar in each case? What is the highest laminar boundary layer thickness in each case? Assuming the flow is entirely turbulent over the plate, calculate the drag force in both test cases Take air density as 1.2 kg/m3 and its viscosity as μ=18×10−6μ=18×10−6 N.s/m2.Air at 20°C flows at V = 8.5 m/s parallel to a flat plate Fig.. The front of the plate is well rounded, and the plate is 40 cm long. The plate thickness is h = 0.75 cm, but because of boundary layer displacement effects, the flow outside the boundary layer “sees” a plate that has larger apparent thickness. Calculate the apparent thickness of the plate (include both sides) at downstream distance x = 10 cm.Air at 20°C and 1 atm flows at 3 m/s past a sharp flat plate2 m wide and 1 m long. (a) What is the wall shear stress atthe end of the plate? (b) What is the air velocity at a point4.5 mm normal to the end of the plate? (c) What is the totalfriction drag on the plate?
- Air at 20°C flows at V = 80.0 m/s over a smooth flat plate of length L = 17.5 m. Plot the turbulent boundary layer profile in physical variables (u as a function of y) at x = L. Compare the profile generated by the one-seventh-power law, the log law, and Spalding’s law of the wall, assuming that the boundary layer is fully turbulent from the beginning of the plate.7. A flat plate has a length of 40 cm and width of 1 m. Air, at pressure of 2 atm,temperature of 57 C, and velocity of 3 m/s flows over the plate. Find the thicknessof the boundary layer at x = L.The standard sea level value of viscosity coefficient for air is μ = 1.7894×10−5 kg/(m · s) = 3.7373 × 10−7 slug/(ft · s). The wing on a Piper Cherokee general aviation aircraft is rectangular, witha span of 9.75 m and a chord of 1.6 m. The aircraft is flying at cruisingspeed (141 mi/h) at sea level. Assume that the skin-friction drag on thewing can be approximated by the drag on a flat plate of the samedimensions. Calculate the skin-friction drag:a. If the flow were completely laminar (which is not the case in real life)b. If the flow were completely turbulent (which is more realistic)Compare the two results.