Water at 90 °C enters a 10-cm-diameter and 400-m-long uninsulated pipe at a rate of 4.5 kg/s and leav o °C. Windy air at 15°C externally flows normal to the pipe. Disregarding radiation determine the rage wind velocity in km/h. Assume pipe wall thickness is negligible.

Water at 90 °C enters a 10-cm-diameter and 400-m-long uninsulated pipe at a rate of 4.5 kg/s and leav o °C. Windy air at 15°C externally flows normal to the pipe. Disregarding radiation determine the rage wind velocity in km/h. Assume pipe wall thickness is negligible.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.20P

See similar textbooks

Related questions

Q: derived from the Hagen-Poiseuille equation through the introduction of the Reynolds number. What is…

Q: For axial flow through a circular tube, the Reynolds numberfor the transition to turbulence is…

A: Write the given data:

Q: Consider an air solar collector that is 1 m wide and 4 m long and has a constant spacing of 3 cm…

A: The properties of air at 45 oC are given as, The hydraulic diameter is written as, The velocity of…

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: In whât external real flows do we not have a boundary layer ? Explain.

A: This problem is related to fluid mechanics. Fluid mechanics is the subject of mechanical engineering…

Q: Q4//A/ Air enters a constant-area insulated duct with a velocity of 118 m/s, static temperature of…

A: Given V=118 m/s , T=283 K , P=400 kPa, D=4.5 cm , L=65 cm , f=0.05;So the loss of pressure in the…

Q: The velocity and temperature of the flow ahead of a normal shock wave are 1215 m/s and 300 K,…

A: Write the given data.

Q: Consider laminar flow of water over a flat plate of length 1 m. If the boundary layer thickness at a…

Q: The relations to convert the oblique shock wave to nomal shock wave. - Continuity equation in…

Q: Consider a normal shock wave in air where the upstream flow properties are u1 = 690 m/s, T1 = 288 K,…

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: Air at 15 °C is flowing in a 2.75-mm-diameter tube at such a rate that the wall shear stress has a…

A: Given data: d=2.75 mmτw=3.3×10-4 N/m2T=15°C Need to determine the mass flow rate of the air.

Q: Q4 : Air is flowing over a long flat plat velocity 8 m/s . Determine the distance from the leading…

A: Let x = distance from leading edge U =Velocity=8m/s ν =Kinematic viscosity =1.798X10-5 m2/s…

Q: hons Example 10.12 A laminar boundary layer on a flat plate has a velocity distribution given by ()-…

Q: EES Metal plates (k = 180 W/m-K, p= 2800 kg/m², |and c, = 880 J/kg-K) with a length of 1 m and a…

Q: For pipes, laminar flow occurs when Reynolds number is Less than 4000 O More than 4000 O Between…

A: Reynold number is the ratio of the inertia force to the viscous force If Re<2000 Laminar flow If…

Q: Atmospheric air at 25oC and with a speed of 50 m/s is pumped by a fan over a flat plate. a)What is…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: Air enters a 10-m-long section of a rectangular duct of cross section 15 cm × 20 cm made of…

A: Given data P1=1 atmT1=35°cV=5 m/s

Q: w. Why? Elabo

A: solution of above problem is below

Q: Q4/A/ Air enters a constant-area insulated duct with a velocity of 118 m/s, static temperature of…

A: As per Bartleby's policy in case of multiple questions I can solve only first one. Please repost…

Q: 3-Air flows over the flat plate at velocity 3 m/s and ambint temperature 15 C.The plate is maintaned…

Q: What is turbulent viscosity? What causes it?

A: Turbulent viscosity is defined as the coefficient of viscosity whose value obtained the average…

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: The weight of a thin flat plate 50 cm × 50 cm in size is balanced by a counterweight that has a mass…

A: Given data: Free-stream velocity of air, V = 10 m/s. Breadth of the plate, b = 50 cm. Length of the…

Q: Is Bernoulli equation valid only for rotational flows or it is also valid for irrotational flow?…

A: Given question: Is Bernoulli equation valid only for rotational flows or is it also valid for…

Q: Someone claims that in the fully developed laminar flow region, the velocity profile change in the…

A: No. I do not agree as the velocity in fully developed laminar region remains unchanged.

Q: Atmospheric air is in parallel flow (1 10 m/s, T 15°C) over a flat heater surface that is to be…

Q: Consider an air solar collector that is 1 m wide and 5 m long and has a constant spacing of 3 cm…

Q: Is Reynolds number specified as a flow property? (True or False)

A: Reynolds number: The ratio of inertia force to the viscous force is known as Reynolds number.…

Q: Wind flows over a flat plate of length L = 25 mm and width W = 8 mm. The plate is maintained at a…

Q: The weight of a thin flat plate 50 cm * 50 cmin size is balanced by a counterweight that has a mass…

A: The related diagram is given as, The density of air is written as, The kinematic viscosity of air…

Q: Air flows over a flat plate with a velocity u = 13 m/s and temperature Te = 25 °C. The plate surface…

A: Use Reynold number and nusselt number expression to differentiate the flow region.

Q: Air with density Pair = 1.19 kg/m3 and viscosity vair = 14.86 .10-6 m²/s flows through a pipe, with…

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: Air at atmospheric pressure and temperature of 25 oC flows at a speed of 10 m/s along a flat plate…

A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: Air enters a 10-m-long section of a rectangular duct of cross section 15 cm * 20 cm made of…

A: Calculating hydraulic diameter of the duct,

Q: Q7) The components of an electronic system are located in a 1.5-m-long horizontal duct whose cross…

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: Air at atmospheric conditions (101.3 kPa and 20° C) enters the bottom of a 90° conical flowmeter…

A: Given, Mass flow rate, m=0.4kg/sPressure, P=101.3KPaTemperature, T=20°C=293KDiameter , d=7.5cmFrom…

Q: In an Osborne Reynolds Demonstration experiment, why is it the in laminar flow, the color collected…

A: Osborne Reynolds Demonstration is an experiment conducted to demonstrate the various flow patterns…

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: Write down the power-law velocity profile empirical correlation and when is this relation valid?

A: According to Nikuradse, The velocity profile for smooth pipe is given by, uumax=yR1n where, n…

Q: Air at 1atm, 35 degree celcius (ρ = 1.145 kg/m3 and μ = 1.895 x 10-5 kg/m.s) and average velocity of…

Q: Air is heated in a 4cm×4cm sheet metal duct with a uniform surface heat flux of 590 W/m2. The mean…

Question

Q2. Water at 90 °C enters a 10-cm-diameter and 400-m-long uninsulated pipe at a rate of 4.5 kg/s and leaves
at 80 °C. Windy air at 15°C externally flows normal to the pipe. Disregarding radiation determine the
average wind velocity in km/h. Assume pipe wall thickness is negligible.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Air with a 1.7 atm gauge and a temperature of 15°C enters a horizontal 0.075m steel pipe 70 m long. The velocity at the pipe's entry is 60 m/s. What is the pressure at the discharge end of the line assuming isothermal flow?
A 2-cm diameter, 10-m long tube transports water at an average flow velocity of 8 m/s. The water enters at 20°C and leaves at 30°C. To compute for the Nusselt number of the water flow, what is the exact value of the temperature in °C on which the water properties should be based?
A thin metal sheet serving the purpose of an an anemometer has a length of 2.5 cm with a width of 8 mm. Wind with a temperature T, and velocity Uz blows parallel to the longest side of the sheet. The metal sheet is heated through a solar powered system giving our heat both sides at Q Watts. The anemometer is used in air with T,= 20C, C, = 1.005KJ/Kg K, v = 1.522 X 105 m2/s, p = 1.19 Kg/m³ and Pr = 0.72. The surface temperature, T, of the metal sheet was measured at the rear end however, it can be assumed to be constant. You are required to calculate an estimate of the wind speed when T = 32 °C and Q = 0.5 W.
Air at 15°C (1atm) flows in a 5 cm x 8 cm cross section rectangular duct at a velocity of 4 m/s. What is the Reynolds Number?
Air at 1.7 atm gauge and 15°C enters a horizontal 75-mm steel pipe that is 70 m long. The velocity at the entrance of the pipe is 60 m/s. Assuming isothermal flow, what is the pressure at the discharge end of the line? ANSWER SHOULD BE 1.982 atm
Air at 20°C is hydrodynamically fully developed as it flows in a 1 cm I.D. pipe. The average velocity is 0.7 m/s. If it enters a section where the pipe wall is at 60°C, what is the temperature 0.25 m farther down stream?
Answer completely Show how the Darcy-Weisbach equation can be derived from the Hagen-Poiseuille equation through the introduction of the Reynolds number. What is the friction factor, f, equal to for flow at a laminar condition? What is it equal to in other regimes of flow?
Air at 60°F and atmospheric pressure flows in a horizontal duct with a cross section corresponding to an equilateral triangle (all sides equal). The duct is 100 ft long, and the dimension of a side is 6 in. The duct is constructed of galvanized iron (ks = 0.0005 ft). The mean velocity in the duct is 12 ft/s. What is the pressure drop over the 100 ft length? 12 ft/s 6 in 100 ft
e- Water at 12 °C is to be heated to 60 °C by passing it over a bundle of 3-m-long, 2-cm-diameter resistance heater rods maintained at 95 °C. Water approaches the heater rod bundle in normal direction at a mean velocity of 1.2 m/s. The rods are arranged in-line with longitudinal and transverse pitches of SL = 4 cm and ST = 3 cm. Calculate the number of tube rows Ni in the flow direction needed to achieve the indicated temperature rise.
Example 3: Air at 27◦C and 1 atm flows over a flat plate at a speed of 2 m/s. Assume that the plate is heated over its entire length to a temperature of 60◦C. Calculate the heat transferred in (a) the first 20 cm of the plate and (b) the first 40 cm of the plate.
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.
5. Water flows over a L=0.3 m long plate at 1.2 m/s velocity and 3°C temperature. There is a correlation between the water temperature and the plate surface temperature as Ts(x) -T=Cx0.75 across the plate (C = 54.27 °C/m0.75). The surface temperature varies throughout the plate. Find the average heat transfer coefficient for this case.