Discuss the boundary layer profile that would result for a vertical hot plate, and a vertical cold plate, suspended in a quiescent fluid.
Q: Air at 1 atm is flowing at a velocity of 2.2 m/s across a flat plate. The film temperature between…
A: Given data: Pressure of air = P = 1 atm Velocity of air = V = 2.2 m/s Film temperature between the…
Q: Consider the following fluids at a film temperature of 300 Kin parallel flow over a flat plate with…
A:
Q: What electrical current is required to maintain a 0.076 mm diameter, 0.6 m long vertical wire at…
A: NOTE:- Here, we have to use correlation for find out the convection heat transfer rate.So, answer…
Q: Air at 20oC and 1 atm flows over a flat plate at 35 m/s. The plate is 75 cm long and 100 cm depth…
A: Velocity boundary layer thickness The thickness of the velocity boundary layer is normally defined…
Q: Which of the following statement is wnong? O a. In the boundary layer region the frictional effect…
A:
Q: In the laminar flow of air (Pr = 0.7) over a heated plate. if ö and S denote, respectively, the…
A:
Q: 8 Air at standard conditions of 1 atm and 27°C flows over a flat plate at 20 m/s. The plate is 60 cm…
A:
Q: Water at 15 oC flow over a plate at 25 oC, the free stream velocity of water is 3 m/s. determine the…
A: Reynold's number is defined as the ratio of inertial force to the viscous force applied on a fluid…
Q: 5 Air at 90°C and 1 atm flows over a flat plate at a velocity of 30 m/s. How thick is the boundary…
A:
Q: Engine oil at 80°C flows over a flat surface at 40°C for cooling purpose, the flow velocity being 2…
A: Given Velocity, v = 2 m/s Distance, x = 0.4 m Properties at 80 + 40 /2 = 60oC Kinematic…
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: Given: The temperature of water, T = 60°C The side of square plate, s = 2.5 cm The temperature of…
Q: Q1: Air at 300 K and 50 kPa flows over a 2-m-square plate at a velocity of 70 m/s. The plate is…
A:
Q: Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with…
A:
Q: A horizontal plate (k = 30 W/m.K) with 600 mm width X 900 mm length X 30 mm depth is maintained at…
A: Given data, Thermal conductivity k= 30 w/m.K Dimension - w= 600 mm =0.6 m L= 900 mm =0.9 m d=…
Q: 19.6 Consider a compressible, laminar boundary layer over a flat plate. Assuming Pr = 1 and a…
A: Given data
Q: Consider a bullet piercing through calm air during a short time interval in which the bullet’s speed…
A: It is asked in the question whether air flow over a bullet is one,two or three dimensional.We have…
Q: For external forced convection with an isothermal surface, what is the Nu# correlation equation for…
A: Nusselt number (Nu) signifies the ratio of conductive resistance to the convective resistance…
Q: Water at 15 oC flow over a plate at 25 oC, the free stream velocity of water is 3 m/s. determine the…
A: Given data: The mean temperature is The properties of water at 20 degrees Celsius are:
Q: Air at standard conditions of 1 atm and 27°C flows over a flat plate at 20 m/s. The plate is 60 cm…
A: Given:p=1 atmT=27°C =300 KV=20 m/sa=60 cm =0.6 mTp=97°C =370 K
Q: The ................. local convection coefficients occur at the leading edge of the flat plate,…
A: The relation between the local convection coefficient (hx) and distance from leading edge (x) can be…
Q: 1.0 Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate…
A: Given data: Film temperature = T = 300 K velocity = u = 1 m/s Distance from leading edge = x = 20 mm…
Q: A thin, flat plate that is 0.2 m × 0.2 m on a side is oriented parallel to an atmospheric airstream…
A:
Q: nvection. (a) is thinner than the hydrod
A: given: For the fluid flowing over a flat plate with Prandtl number greater than unity, the thermal…
Q: 3. (a) Discuss, the concepts of velocity boundary layer and temperature boundary layer. Provide some…
A: Velocity Boundary Layer; when a fluid flows over a stationary surface, e.g. the flat plate, the bed…
Q: Consider atmospheric air at 25°C and a velocity of 25 m/s flowing over both surfaces of a 1-m- flat…
A:
Q: The average friction coefficient in the laminar region for flow over a flat plate 0.6 m long is…
A: For air at 40°C - Density,ρ=1.128kg/m3Kinematic viscosity, ν=16.96×10-6m2/sThermal conductivity,…
Q: A large vertical plate 6.1 m high and 1.22 m wide is maintained at a constant temperature of 57+C…
A: Determine the mean film temperature
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: Which parameter does not affect an earlier occurrence of the transition of Laminar flow to turbulent…
A: Laminar flow is the characteristics of flow that occurs when a fluid flows in parallel layers,…
Q: Air at 1 atm is flowing at a velocity of 1.5 m/s across a flat plate. The film temperature between…
A:
Q: Air at a temperature of 25oC flows parallel over a flat plate with free-stream velocity of 2 m/s.…
A:
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: The air at 65°C and with a viscosity of 1.86x10^-5 m^2/s flows along a flat plate at 12 m/s, under…
A:
Q: Show the boundary layer development along the plate and define the characteristics of boundary layer…
A: Given:
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: DO first case, Rex, = 5 × 10³, while in the second case the flow is tripped to a tu e the thermal…
A: V = 1.5 m/sT∞ =45°CTs = 20°CRex,c = 5 × 105x = 0m To-Determine:- x = ____mqlam'' = ____ W/m2qturb''…
Q: Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with…
A: Given dataFilm temperature = 300 KFlow velocity = u = 1 m/sWe have to find the velocity and thermal…
Q: Water at 60 ⁰C and velocity of 2 cm/s flows over a 5 m long flat plate which is maintained at a…
A: Prandtl number is defined as a ratio of the kinematics viscosity to the thermal diffusivity. It…
Q: A hot vertical plate is subject to natural convection with air. If the local Raleigh number at the…
A:
Q: Question 7 In the case of natural convection over a vertical hot wall, at boundary layer thickness…
A: Answer: The correct answer is option (c).
Q: Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with…
A: Given data: Film Temperature = Tf = 300 K Fluid velocity = u = 1 m/s Fluids are : Air, Water, Engine…
Q: Consider the following fluids at a film temperature of 300 K in parallel flow over a flat plate with…
A: Given data: Film Temperature = Tf = 300 K Velocity of flow = u = 1 m/s x = distance from leading…
Q: Q2/Engine oil at 80°C flows over a 6-m-long flat plate whose temperature is 30°C with a velocity of…
A:
Q: The passenger compartment of a minivan traveling at 50 mi/h in ambient air at 1 atm and 80°F is…
A: Given data *The speed of the minivan is V = 50 mi/h = 50 × 1.46667 ft/s = 73.3335 ft/s *The length…
Step by step
Solved in 2 steps with 2 images
- A 10-cm-diameter, 30-cm-high cylindrical bottle contains cold water at 3°C. The bottle is placed in windy air at 27°C. The water temperature is measured to be 11°C after 45 min of cooling. Disregarding radiation effects and heat transfer from the top and bottom surfaces, estimate the average wind velocity.What are the turbulence intensity differences on offshore and onshore?Air at 20oC and 1 atm flows over a flat plate at 35 m/s. The plate is 75 cm long and 100 cm depth and is maintained at 60oC. Calculate (a) velocity boundary layer thickness at the leading edge, (b) thermal boundary layer thickness at the distance of 10 cm from the leading edge, and (c) thermal boundary layer thickness at the trailing edge.
- Q6: A large vertical plate 6.1 m high and 1.22 m wide is maintained at a constant temperature of 57+C and exposed to atmospheric air at 4°C. Calculate the heat lost by the plate. Answers: Q=1907 WAir 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.Show the boundary layer development along the plate and define the characteristics of boundary layer from plate to the free stream region in turbulent boundary layer region.
- Consider oil flowing along with a flat plate parallelly. The oil flow creates laminar velocity and thermal boundary layers because the oil temperature and plate temperature are different. In general, which boundary layer of the oil is thicker, (1) velocity boundary layer or (2) thermal boundary layer? Answer (1) or (2).What is the effect of streamlining on (a) friction drag and (b) pressure drag? Does the total drag acting on a body necessarily decrease as a result of streamlining? Explain.The air at 65°C and with a viscosity of 1.86x10^-5 m^2/s flows along a flat plate at 12 m/s, under laminar regime, which distance, from the leading edge, where the boundary layer thickness reaches 0.5 cm?
- A thin, flat plate that is 0.2 m × 0.2 m on a side is oriented parallel to anatmospheric airstream having a velocity of 40 m/s. The air is at a temperatureof T∞ = 20°C, while the plate is maintained at Ts = 120°C. The air flows overthe top and bottom surfaces of the plate, and measurement of the drag forcereveals a value of 0.075 N. What is the rate of heat transfer from both sides ofthe plate to the air?If forced convection uses Reynolds number to account for fluid movement during forced convection, what dimensionless number is used for natural convection?In flow over bluff bodies such as a cylinder, how does the pressure drag differ from the friction drag?