55°C methanol flows over a 4m long 2m width flat plate with temperature of 25 C. The velocity of methanol is 1.08 km/h. Determine the total drag force and the rate of heat transfer from the entire plate. What is the value of x and what does it mean?
Q: Width velocity of 50 m/s. Determine the drag force acting on upper side of the plate when: Engine…
A: Engine oil at 40°C L = 20 m w = 3m v= 50 m/s Properties of engine oil at 40°C ρ = 876 kg/m3, μ…
Q: During a high Reynolds number experiment, the total drag force acting on a spherical body of…
A: Given data, From stokes equation,
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: Air at 1 atm and 20°C is flowing over the top surface of a 0.2 m x 0.5 m-thin metal foil. The air…
A: Given data: Air at 1 atm pressure and temperature,T∞=20°C, is flowing over a thin metal foil of…
Q: In the laminar flow of air (Pr = 0.7) over a heated plate. if ö and S denote, respectively, the…
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: 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: 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: 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: A 1.2-in-outer-diameter pipe is to span across a river at a 115-ft-wide section while being…
A: Given: The outer diameter of the pipe is D=1.2 in. The width of the river is W=115 ft. The average…
Q: An 8-mm-diameter plastic sphere whose density is 1150 kg/m3 is dropped into water at 20°C. Determine…
A: The density of the plastic sphere is given as, The diameter of the plastic sphere is given as, The…
Q: air at atmospheric pressure and 23ºC flows over a flat plate with a velocity of 15m/s. Determine;…
A:
Q: It has a density of 5900 kg/m3 and a specific heat of 590J/kg.°C with a diameter of 15 cm. A…
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: You are pouring heavy syrup on your pancakes. As the syrup spreads over the pancake, would the thin…
A: As the syrup spreads over the pancake, the thin film of syrup forms a laminar flow.
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: A 5-mm-diameter electrical transmission line is exposed to windy air. Determine the drag force…
A: Given data: The diameter of the electrical transmission line, d = 5 mm. The velocity of wind…
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: 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: 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: 55°C methanol flows over a 4m long 2m width flat plate with temperature of 25°C. The velocity of…
A: Reynold's number Reynolds number is a dimensionless quantity that is used to determine the type of…
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: Consider atmospheric air at 25°C and a velocity of 25 m/s flowing over both surfaces of a 1-m- flat…
A:
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: 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: Air is flowing at a speed of 5 m/sec between two parallel flat plates. The air temperature is 20o C…
A: Write the given data with suitable variables. v=5 m/sT∞=20 °CP=1 atmT=90 °Cd=60 cm=0.6 m100 cm1 mb=1…
Q: Calculate the heat transfer from a 60 cm x 60 cm plate on which air flows at 40 C and. The plate…
A:
Q: Air with a pressure of 1 atm and a temperature of 285 K flows in a duct rectangular shape with a…
A: Given, Pressure, P=1atmTemperature, T=285KMass flow rate, m=0.1kg/sDuct size=75mm×150mmLength of…
Q: Show the boundary layer development along the plate and define the characteristics of boundary layer…
A: Given:
Q: 1) Engine oil at 80°C flows over a 6-m-long flat plate whose temperature is 30°C with a velocity of…
A:
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: Consider a refrigeration truck traveling at 70 mi/h at a location where the air is at 1 atm and…
A: Given that,
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: Consider laminar flow of a fluid over a flat plate. Now the free-stream velocity of the fluid is…
A: Drag force is given as –
Q: The local atmospheric pressure in Denver, Colorado (elevation 1610 m), is 83.4 kPa. Air at this…
A: The elevation of Denver, H = 1610 m The pressure in Denver, P = 83.4 kPa The atmospheric temperature…
Q: Problem 1: You are designing a hydraulic press with a heated copper press plate. The press plate is…
A: Given: Dimensions of the plate (L×b)=0.3×0.3Surface temperature (Ts)=200°CVelocity of air flowing…
Q: How does the viscosity affect the drag force?
A: Explaining the effect of viscosity on drag force
Q: Q3/Air at 0.5 atm pressure and 27 C flows across a 34-cm-square plate at a velocity of 20 m/s. The…
A:
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…
Q: A fluid with a constant density of 961 kg/m3 and a constant viscosity of 1.419×10-3 Kg/m.s is…
A: we are supposed to answer only 3 sub parts..please post other parts as the other question.
Q: A 10-cm-diameter, 30-cm-high cylindrical bottle contains cold water at 3°C. The bottle is placed in…
A: Given:- Diameter of bottle=10cm height=30cm temp of cold water =3°C temp of air=27°C temp of water…
Step by step
Solved in 2 steps with 2 images
- 55°C methanol flows over a 4m long 2m width flat plate with temperature of 25°C. The velocity of methanol is 1.08 km/h. Determine the total drag force and the rate of heat transfer from the entire plate. What is the value of x_ and what does it mean?Air with free stream temperature of 10 C is flowing over a flat plate (1.5m long and Im wide). The air is flowing along 1.5m side of the plate. The plate is maintained at 90 C. Find the velocity of air required to have a rate of heat dissipation as 3.75 kW. Use the correlations: Nu =0.664Res Pro3 for laminar flow Nu, = (0.037R *-871)Pr for turbulent flow Take the properties p = 1.0877 kg/m u=2.029x10 m/s, k=0.028 W/mK, C,-1.007KJ/kg.K and Pr=0.703 %3DQ2/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.
- Oxygen gas at a temperature of 27°C at atmospheric pressure flows in parallel at 20 m/s over a square thin plate with a side of 10 cm. Since the plate is held at 127°C, what is the heat transfer from the plate to the fluid? Heat transfer (W) takes place from only one surface of the plateAir at 10°C and 1 atm is flowing parallel at a velocity of 15.5 m/s over the top flat surface of copper plate. The top surface of the copper plate is 0.03m by 0.03m square. The temperature of copper plate is uniform at 65.6°C. For laminar flow, calculate the dimensionless Reymolds number (Nre) and Nussel number (NNu). Table A.3-3a. Physical Properties of Air at 101.325 kPa (1 Atm Abs), SI Units Bx (Bp²/1?) T (kJ/kg · u x T (Pa ·s, k (W/m 103 (1/K • (°C) T (K) (kg/m³) K) -17.8255.41.379 1.0048 1.62 × 6s or kg/m · s) · K) Npr (1/K) m³) 0.022500.7203.92 2.79 x 108 O 273.21.293 1.0048 1.72 × (0-5 0.024230.7153.65 2.04 × 108 10.0 283.21.246 1.0048 1.78 ×/0 0.024920.7133.53 1.72 x 108 37.8 311.01.137 1.0048 1.90%/0-S 0.027000.7053.22 1.12 x 108 Select one: O A. NRe = 27826.58; NNu =98.58 O B. NRe = 23215.74; NNu =152.68 O C. NRe = 27826.58; NNu = 152.68 O D. NRe = 23215.74; NNu =98.58A 4m x 4m flat piale maintained at a constant temperature of NOC is subjected to parallel flow of nit at I am. 20 ', and 10 m's. The total drag force acting on the upper surface of the plate is measured to be 2.4N Determine the average convection hear transfer coefficient, and the rate of heat transfer between the upper surface of the plate and the air. The properties of air at 20 ° C and 1 atm from tables, are
- 4. During a cold winter day, wind blows parallel to a 4 m high and 10 m long wall of a house. If the air outside is at 5°C and the surface temperature of the wall is 15°C, The general non-dimensional correlation for flow over a flat plate is: Nu =(0.037 Re, 0.8-871) Pr¹/3 where the fluid properties are evaluated at the bulk temperature. If the wind blows at 55 km/h, determine: i. the Reynolds number ii. the convection heat transfer coefficient, and iii. the rate of heat transfer from the wall.A 20degC water flows to 50cmx60cm flat plate with velocity of 6m/s . The flat plate surface temperature is maintained at 40deg C. The air flows parallel to the 50cm side of the plate. If the kinematic viscosity of water is 78x10-8 m2/s, at what length the flow become turbulent? If the average laminar heat transfer coefficient of water is 7740W/m2 degC, what is the overall heat transfer at the laminar section?Air at 20 ◦ C flows inside a pipe 18-mm-ID having a uniform heat flux of 150 W/m 2 on the surface, the average flow velocity at entry being 1.0 m/s. The air pressure is 2 bar. Determine the value of convection coefficient. If the pipe is 2.5 m long, determine the air exit temperature and the wall temperature at the exit. Assume fully developed hydrodynamic boundary layer.
- Air at 200C flowing at 25 m/s passes over a flat plate, the surface of which is maintained at 270°C. Calculate the rate at which heat is transferred from both the sides of the plate per unit width over a distance of 0.25 m from the leading edge. Properties of air at 145°C are Prandtl number = 0.687; Viscosity = 2.8 X 10-5 m2/s and thermal conductivity = 3.49 X 10-5 kW/m.KTopic: Heat transfer Completely solve and box the final answer. 1. A 20degC water flows to 50cmx60cm flat plate with velocity of 5.2m/s . The flat plate surface temperature is maintained at 40deg C. The air flows parallel to the 50cm side of the plate. If the kinematic viscosity of water is 78x10-8 m2/s, at what length the flow become turbulent?(b) In turbulent flows contrast the approaches that are used to represent the velocity profile within the boundary layer and comment on any limitations that each may offer.