Consider laminar flow over a flat plate. How does the local friction coefficient change with position?
Q: derived from the Hagen-Poiseuille equation through the introduction of the Reynolds number. What is…
A:
Q: In the laminar flow of air (Pr = 0.7) over a heated plate, if 8 and 8, denote, respectively, the…
A: Given:Prandtl number, Pr=0.7
Q: Show that when laminar flow occurs with mean velocity um between extensive stationary flat plates…
A:
Q: Q3/ An average person generates heat at a rate of 84 W while resting. Assuming one-quarter of this…
A:
Q: What fluid property is responsible for the development of the velocity boundary layer? What is the…
A: When a fluid flows over any stationary surfaces like flat plate, bed of a river or the wall of a…
Q: Required information -0.5 where x Air flowing over a 1-m-long flat plate at a velocity of 7 m/s has…
A: To obtain the velocity gradient of air on the plate, we must first calculate the shear stress acting…
Q: What are the turbulence intensity differences on offshore and onshore?
A: Turbulence intensity differences on offshore and onshore ;
Q: In the laminar flow of air (Pr = 0.7) over a heated plate. if ö and S denote, respectively, the…
A:
Q: To reduce the drag coefficient and thus to improve the fuel efficiency, the frontal area of a car is…
A:
Q: What does the friction coefficient represent in flow over a flat plate? How is it related to the…
A: Drag force is a force acting on a body (moving or stationary)which is present in a moving or…
Q: Consider laminar flow of water over a flat plate of length 1 m. If the boundary layer thickness at a…
A:
Q: A 4-m x 4-m flat plate maintained at a constant temperature of 80°C is subjected to parallel flow of…
A:
Q: How does the wall shear stress ?w vary along the flow direction in the fully developed region in (a)…
A: According to Newton’s law of viscosity, From the relation, shear stress is dependent only on…
Q: To reduce the drag coefficient and thus to improve the fuel efficiency, the frontal area of a car is…
A: Given that, The drag force on the car will be –
Q: In flow over bluff bodies such as a cylinder, how does the pressure drag differ from the friction…
A: The pressure drag is generated due to the shape of the object and it depends on the flow of…
Q: 5. The local atmospheric pressure in Denver, Colorado (elevation 1610 m) is 83.4 kPa. Air at this…
A:
Q: What is the difference in force needed to stabilize a flat plate being sprayed with a jet of water…
A: The force exerted by jet depends on the area of jet or nozzle, velocity of jet coming out through…
Q: Air at 250C and 1.0 bar is flowing over a flat plate with a velocity of 8 m/s. Determine: (i) The…
A:
Q: To reduce the drag coefficient and thus to improve the fuel efficiency, the frontal area of a car is…
A: Given details: Ai=18 ft2Ao=15 ft2d=12000 mi=12000×5280=63360000ftv=55…
Q: describe thickness of the boundary layer in laminar and turbulent flows, Boundary layer separation…
A: Boundary-Layer Thickness: Boundary layer thickness is defined as the distance in the perpendicular…
Q: What effect does increasing the Reynolds number have on coefficient of lift and drag?
A: we know that Reynolds no. is defined as the ratio between flow inertia and viscosity.
Q: How does the air behaves at zero degree?When is the flow turbulent?When does the boundary layer…
A: The chaotic movement of a gas's particles, according to the physical definition of temperature,…
Q: During flow over a given slender body such as a wing, the lift force, the upstream velocity, and the…
A: Answer : The lift force depends upon Density of fluid Upstream Velocity Size, shape and orientation…
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: When does the flow on the plane plate switch to turbulent flow regime? a. It is always fully…
A: Reynolds number is a dimension less parameter which helps us to know the type of flow.
Q: What is the effect of streamlining on (a) friction drag and (b) pressure drag? Does the total drag…
A: Effect of streamlining on:
Q: During flow over a given body, the drag force, the upstream velocity, and the fluid density are…
A: Drag force is the resistive force exerted by a fluid due to its motion. Drag force is supposed to…
Q: What is the formula to determine the velocity of an isentropic flow in terms of po P, and To? v? =…
A: Write the energy flow equation for a steady flow,
Q: What is flow separation? What causes it? What is the effect of flow separation on the drag…
A: Flow separation It is a process in which the boundary layer of the fluid detaches itself from the…
Q: In the laminar flow of air (Pr = 0.7) over a heated plate, if & and 8, denote, respectively, the…
A: Given:Pranddtle number, Pr=0.7δ=hydrodynamic boundary layerδT=Thermal boundary layer
Q: 1. What is the criterion used to classify the viscous flow into laminar and turbulent? Explain.
A: We are suppose to solve only one question. Please post other question as a separate question.
Q: Define the planform area of a body subjected to external flow. When is it appropriate to use the…
A: Planform area: Plan area of an object is taken as the planform area. The plan is the view of the…
Q: Water at 10°C flows over a 4.8-m-long flat plate with a velocity of 1.15 m/s. If the width of the…
A: Given, T = 10°C L = 4.8 m v = 1.15 m/s d = 6.5 m ρ = 999.7 kg/m3 µ = 1.307×10-3 kh/m.s f = ?
Q: Water at 25°C and 1 atm is flowing over a long flat plate with a velocity of 8 m/s. Determine the…
A: Given data T=25°cV=8 m/sRecr=5×105
Q: Q1 (a) Someone claims that in the fully developed laminar flow region, the velocity profile change…
A: No When a flow is fully developed it will have the same velocity profile at any cross-section…
Q: 5. The local atmospheric pressure in Denver, Colorado (elevation 1610 m) is 83.4 kPa. Air at this…
A: Given:P=83.4 KPaT=25°Cv=9 m/sA=2.5*5 m2
Q: How does the viscosity affect the drag force?
A: Explaining the effect of viscosity on drag force
Q: How does the construction of a low speed and high-speed aircraft differ? What effects can be…
A: The choice of the airfoil for the airplane wing involves the selection of camber, thickness ratio…
Q: Define the frontal area of a body subjected to external flow. When is it appropriate to use the…
A: Frontal area is the projected area of the body to a plane which is normal to the flow of the fluid.…
Q: What is lift? What causes it? Does wall shear contribute to the lift?
A: given: What is lift? What causes it? Does wall shear contribute to the lift?
Q: A 2-m-high, 4-m-wide rectangular advertisement panel is attached to a 4-m-wide, 0.15-m-high…
A: Given data as per question wind speed = 150 km/h = 150/3.6 m/s width of rectangular advertisement…
Q: Explain why the friction factor is independent of the Reynolds number at very large Reynolds…
A: As we know reynolds number Re=ρνDμwhereρ=density of fluid V= velocity of fluid μ=viscosity of fluid…
Q: An airplane is consuming fuel at a rate of 7 gal/ min when cruising at a constant altitude of 10,000…
A: Take the following assumptions. Standard atmospheric conditions exist. The settings of the plane…
Q: What is the difference between streamlined and bluff bodies? Is a tennis ball a streamlined or bluff…
A: If bodies subjected to fluid,flow can be classified as sreamlined or bluff body. a body is said to…
Q: What is induced drag on wings? Can the induced drag be minimized by (1) long and narrow wings or (2)…
A: Given question? What is induced drag on wing? Can it be minimized by wing shape?
Q: To reduce the drag coefficient and thus to improve the fuel efficiency, the frontal area of a car is…
A: Given data,
Consider laminar flow over a flat plate. How does the local friction coefficient change with position?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- What are the factors that affect the value of Friction factor in Laminar flow and Turbulent flow?Q3) Engine oil at 80°C flows over a flat surface at 40°C for cooling purpose, the flow velocity being 2 m/s. Determine at a distance of 0.4 m from the leading edge the hydrodynamic and thermal boundary layer thickness. Also determine the local and average values of friction and convection coefficients.Atmospheric air is in parallel flow (u∞ = 10 m/s, T = 15°C) over a flat heater surface that is to be maintained at a temperature of 90°C. The heater surface area is 0.25 m², and the airflow is known to induce a drag force of 0.17 N on the heater. What is the electrical power, in kW, needed to maintain the prescribed surface temperature? Use the modified Reynolds or Chilton-Colburn analogy. Evaluate properties for the air at 325 K. q= i kW
- Air flowing over a 1-m-long flat plate at a velocity of 7 m/s has a friction coefficient given as Cf= 0.664(Vx/v) is the location along the plate. 1-0.5 where x Given:/The properties of air at 20°C are u = 1.825 × 10 kg/m-s, V =1.516 × 105 m-/s, and p= 1.204 kg/m -5 Determine the wall shear stress at x 0.6 m of the plate. Evaluate the air properties at 20°C and 1 atm. (Round the final answer to five decimál places. You must provide an answer before moving on to the next part.) The wall shear stress is | Nim2.Q2/Engine oil at 80°C flows over a 6-m-long flat plate whose temperature is 30°C with a velocity of 3 m/s. Determine the total drag force and the rate of heat transfer over the entire plate per unit width.Consider atmospheric air at 25 °C and a velocity of 25 m/s flowing over BOTH surfaces of a 1-m- long flat plate that is maintained at 125 °C. The width of the plate (into paper direction) is 1 m. Determine the rate of heat transfer if the critical Reynolds number is 5 × 105.
- What is turbulent viscosity? What causes it?- Engine oil at 20°C is forced over a 20-cm-square plate at a velocity of 1.2 m/s. The plate is heated to a uniform temperature of 60°C. Calculate the heat lost by the plate, and the drag force exerted on the first 40 cm of the plate using the analogy between fluid friction and heat transfer.The local atmospheric pressure in Denver, Colorado (elevation 1610 m), is 83.4 kPa. Air at this pressure and 20°C flows with a velocity of 8 m/s over a 1.5 m * 6 m flat plate whose temperature is 140°C. Determine the rate of heat transfer from the plate if the air flows parallel to the (a) 6-m-long side and (b) the 1.5 m side.
- Air at 250C and 1.0 bar is flowing over a flat plate with a velocity of 8 m/s. Determine: (i) The distance from the leading edge where the flow becomes turbulent (ii) The thickness of the boundary layer at that location.Air at 30oC (density=1.165 kg/m3, kinematic viscosity = 16x10-5 m2/s) flows over a flat plate at a free stream velocity of 4.19 m/s. Determine the boundary layer thickness at distances of 0.2m, 0.5 m and 0.8 m. Also determine the skin friction coefficients, both local and average, at these locations.The flow velocity of air over a flat plate of dimension 1160 ×610 ×25 mm at 30 OC is 3.2 m/s. The top surface of the plate is maintained at 110 OC. Calculate the bottom temperature of the plate at steady state.