Consider two cases involving parallel flow of dry air at V = 3.5 m/s, T = 45°C, and atmospheric pressure over an isothermal plate at T, = 20°C. In the first case, Re = 5× 105, while in the second case the flow is tripped to a turbulent state at.x = 0m. At what.x -location, in m, are the thermal boundary layer thicknesses of the two cases equal? What are the local heat fluxes, in W/m2, at this location for the two cases? X = W/m? urb W/m?

Consider two cases involving parallel flow of dry air at V = 3.5 m/s, T = 45°C, and atmospheric pressure over an isothermal plate at T, = 20°C. In the first case, Re = 5× 105, while in the second case the flow is tripped to a turbulent state at.x = 0m. At what.x -location, in m, are the thermal boundary layer thicknesses of the two cases equal? What are the local heat fluxes, in W/m2, at this location for the two cases? X = W/m? urb W/m?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: Air at 295 K flows at 3 m/s over a flat plate at 390 K. The air properties are as follows: density…

Q: Consider two cases involving parallel flow of dry air at V = 3.5 m/s, T = 45°C, and atmospheric…

Q: A long 8cm diameter steam pipe whose external surface temperature is 90°C passes through some open…

A: The diameter of the steam pipe, D = 8cm=0.08 mThe external surface temperature, The air…

Q: Air at standard pressure flows across a flat plate at 3m/s. The temperature surface is 50oC and the…

Q: Forced air at Too = 25°C and V = 17 m/s is used to cool electronic elements on a circuit board. One…

Q: Water at a temperature of 25oC flows parallel over a flat plate with free-stream velocity of 2 m/s.…

Q: Outside air ( v =15.89 x 106 m2/s, p= 1.16 kg/m3, Pr=D0.707, k=0.0263 W/mK) with temperature of…

A: In general, there are three modes by which heat gets transferred from one place to another. The…

Q: Consider two cases involving parallel flow of dry air at V = 5 m/s, T=45°C, and atmospheric pressure…

Q: A long, cylindrical, electrical heating element of diameter D = 14 mm, thermal conductivity k = 251…

A: Note that the initial surface temperature is not given in the question, so I have taken the film…

Q: Water at 30 °C enters a pipe of 25 mm in diameter and 1 m in length with a mean velocity of 0.06…

Q: The ratio of the mass flow rate, m b,

A: Given; A steady laminar boundary layer is formed over a flat plate as shown in figure.…

Q: Air at standard pressure flows across a flat plate at 3m/s. The temperature surface is 50oC and the…

A: V= 3m/sTs = 500 CTo = 200 Cx=1 m

Q: Find out the local convection coefficient for a flow over a flat plate at a distance of 0.2 m from…

A: As per the company policy, we are restricted to solve only one question at a time. Thanks for…

Q: Air at 10 m/s is flowing over a cylinder of D=(1) cm and L = 1 m. Air has thermal conductivity 0.027…

Q: Cold fluid flows at a velocity of 8 m/s over a hot flat plate. The flow is laminar, and the velocity…

Q: Assuming Air at 20°C blows over hot plates 50 by 75 cm maintained at 250 °C, (h = 25 W/m². C), and…

Q: Use scale analysis to find an expression for 8/x and Nu for flow over a flat plate with a thin…

Q: The exact expression for the local Nusselt number for laminar flow along a flat plate is given by:…

Q: Air at standard pressure flows across a flat plate at 3m/s. The temperature surface is 50oC and the…

Q: Forced air at T∞ = 25°C and V = 12 m/s is used to cool electronic elements on a circuit board. One…

Q: Consider an airflow over the surface of a flat plate with a temperature Ts = 250 °C. At some…

Q: Air at 295 K flows at 3 m/s over a flat plate at 390 K. The air properties are as follows: density…

A: The objective of the question is to find the distance from the leading edge where the flow becomes…

Q: Air at a temperature of 25oC flows parallel over a flat plate with free-stream velocity of 2 m/s.…

Question

Consider two cases involving parallel flow of dry air at V = 3.5 m/s, T, = 45°C, and atmospheric pressure over an isothermal plate
at T, = 20°C. In the first case, Ree = 5× 105, while in the second case the flow is tripped to a turbulent state at.x = 0m. At what x
-location, in m, are the thermal boundary layer thicknesses of the two cases equal? What are the local heat fluxes, in W/m?, at this
location for the two cases?
X =
m
d'am
W/m2
i
urb
W/m?
i

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

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Fick’s Law of Diffusion and Mass Transfer

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

Heat transfers Water (T= 10 C, , k=0.644 W/m.C, υ = 5.54× 10^-7 m2/s, Pr=3.55), flow over plate 1m x 1m , with velocity 2 m/s. the plate surface temperature is 90 C. Give the answer for the following: Nu number equal to Total heat transfer The flow type The average heat transfer coefficient
I need correctly
Air at 295 K flows at 3 m/s over a flat plate at 390 K. The air properties are as follows: density =1.1 kg/m3, viscosity =18.1×10−6 Pa.s, specific heat capacity =1005 J/kgK, and thermal conductivity =0.024 W/mK. The velocity and temperature profiles are assumed to be linear, giving the local Nusselt number to be Nux = 0.289 Rex1/ 2Pr1/3. The flow will become turbulent at a Reynolds number of 5×105. Assume the width of the plate perpendicular to the air flow is 1 m. At what distance from the leading edge does the flow become turbulent? ________m What is the heat transfer at the point of transition? ___________W What is the total heat transfer along the length of the plate where the flow is laminar? __________W
A vertical pipe 90 mm diameter and 2.5 m height is maintained at a constant temperature of 125 o The pipe is surrounded by still atmospheric air at 25 oC. Find heat loss by natural convection. Properties of water at 75 oC: Density = 1.0145 kg/m3 Kinematic viscosity = 20.55 x10-6 m2/s Prandtl number (Pr) = 0.693 Thermal conductivity (k) = 30.06 x 10–3 W/m K
O. 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 =0.664Reos Pro33 for laminar flow Nu, = (0.037RE-871)Pr3 for turbulent flow Take the properties p = 1.0877 kg/m u=2.029×10 m/s, k=0.028 W/mK, C,-1.007KJ/kg.K and Pr-0.703
i need the answer quickly
In cold climates, weather reports usually give both the actual air temperature and the "wind-chill" temperature, which can be interpreted as follows. At the prevailing wind speed there is a rate of heat loss per unit area q, from a clothed person for an air temperature Te. The wind-chill temperature Twe is the air temperature that will give the same rate of heat loss on a calm day. Estimate the wind-chill temperature on a day when the air temperature is -10°C and the wind speed is 10m/s, giving a convective heat transfer coefficient of 50 W/m² K. A radiation heat transfer coefficient of 5 W/m² K can be used, and under calm conditions the convective heat transfer coefficient can be taken to be 5.0 W/m² K. Assume a 3 mm layer of skin (k = 0.35 W/m K), clothing equivalent to 8 mm-thick wool (k = 0.05 W/m K), and a temperature of 35°C below the skin. Also calculate the skin outer temperature.
Air at 305 K flows at 4 m/s over a flat plate at 350 K. The air properties are as follows: density =1.1 kg/m3, viscosity =18.1×10−6 Pa.s, specific heat capacity =1005 J/kgK, and thermal conductivity =0.024 W/mK. The velocity and temperature profiles are assumed to be linear, giving the local Nusselt number to be Nux = 0.289 Rex1/ 2Pr1/3. The flow will become turbulent at a Reynolds number of 5×105. Assume the width of the plate perpendicular to the air flow is 1 m. At what distance from the leading edge does the flow become turbulent? ________m What is the heat transfer at the point of transition? ___________W What is the total heat transfer along the length of the plate where the flow is laminar? __________W