In convection heat transfer, what mechanism heat transfer where the fluid moves due to the decrease in its density caused by increase in temperature? Select the correct response: ONatural convection O Forced convection Density convection Radical convection

In convection heat transfer, what mechanism heat transfer where the fluid moves due to the decrease in its density caused by increase in temperature? Select the correct response: ONatural convection O Forced convection Density convection Radical convection

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.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.6P

See similar textbooks

Related questions

Q: A copper rod has an initial length 5.0 cm and a thermal expansion coefficient of 16 x 10-6 /K. It is…

Q: A short cylinder having an initial temperature of 40 C is suddenly exposed to a convection boundary…

A: Given : To find : Temperature at given points A,B,C,D

Q: Air at 20◦C blows over a hot plate 50 by 75 cm maintained at 250◦C. The convection heat-transfer…

Q: re below. A hot fluid at temperature To passes throu hematical model that gives the variation of the…

A: given data COPPER copper k=40W/m°ccross section area , A =1 m2then heat transfer rate through…

Q: number 1 A food product containing 80% moisture content is being frozen. Estimate the specific heat…

A: 80% moisture content is frozen.80% water is frozen which means 20% is still water, soSpecific heat…

Q: Q2/ A thermopane window consists of two pieces of glass 7 mm thick that enclose an air space 7 mm…

Q: A 0.1 m diameter long rod at 20 °C is to be heated by a hot fluid of 200 °C. How long does it take…

A: The thermal diffusivity is given by - α=KρC , whereK is conductivity, ρ is density and C is specific…

Q: Find the freezing time, t, for chicken at an initial temperature of 0 °C, to reach -4 °C at the…

A: Given Diameter, d = 15 cm Thermal conductivity, k = 0.478 W/mK Heat transfer coefficient, h…

Q: For free-flowing granular solids, what general range of angle of response? Select one: а. 0-10° b.…

A: Given Data→ Free-flowing granular solids Range of angle of response

Q: A hollow aluminum cylinder 16.5 cm deep has an internal capacity of 2.000 L at 23.0°C. It is…

Q: A spherical steel tank (k-15 W/m.°C, thickness-1.5 cm) tank of inner diameter 3.85 m contains ice @…

A: When the molecules of a high temperature body transfers to the body having low temperature, then…

Q: A vertical cooling fin approximates a flat plate 800 mm in height is.exposed to saturated steam at…

A: Given: A vertical cooling fin approximates a flat plate of x=800 mm. The temperature of saturated…

Q: QUESTION-) 236 °C steam flows in a pipe which features are given below. Inner and outer diameters…

A: a) Outer surface area (A0)= π×do×L= 502.65m2 Inner surface area (Ai)=π×di×L=471.2388m2 Internal…

Q: 3. The following data is related to a short brass cylinder of diameter D = 10 cm and height H = 20…

A: Data given-

Q: Let's say a 3.0 gram copper wafer is dropped from a height of 50.0 meters. If 60% of the potential…

Q: Materials expand when heated. Consider a metal rod of length L0 at temperature T0. If the…

A: Given: α=1.24×10-5°CL0=40 cmT0=40°C

Q: A product food with a moisture content of 80% in canned diameter 5 cm want to be frozen. Density…

A: Given: d=5 cmρ=1000 kg/m3k=1.0 W/mKT0=-1.75 °Ct=10 hrsT∞=-25°CT=-10°C

Q: Q2/ A thermopane window consists of two pieces of glass 7 mm thick that enclose an air space 7 mm…

A: Given Data: Length of the glass and air space, L=7 mm=0.007 m Temperature of air inside the room,…

Q: A circular plate of diameter (1.36 m) is placed some how 1.5 meter above the room floor, if the…

A: Given, D=1.36 mRa=7.653×107×D3k=0.0372 W/m.KPr=0.686△T=730C=73 K (∵Temperature difference)

Q: A 2 cm thick steel slab heated to 525° C is held in air stream having a mean temperature of 25° C.…

Q: 236 °C steam flows in a pipe which features are given below. Inner and outer diameters of pipe are…

A: First of considering uninsulated pipe.

Q: Steel pipe 5 cm thick, 1.0 m long and 12 cm deep, covered with 8 cm thick insulation. The wall…

A: thickness of steel pipe, t=5cmpipe long, L=1minner diameter of the pipe, di=12cmouter diameter of…

Q: Copper fins, 2.1 cm long and 2.1 mm in diameter, are attached to a base plate at 75 °C. A fan blows…

Q: steel ball [c = 0.46 kJ/kg · ◦C, k = 35 W/m · ◦C] 5.0 cm in diameter and initially at a uniform…

Q: the midpoint temperature of the rod?

Q: ƏT k [a2T a2T] ax ay pcp [ax2' ay²]

A: For solution refer below images.

Q: Arefrigerated compartment of a truck is H=2.4-m high and L =6.6-m long. On a hot summer day, it is…

A: Natural convection, known also as free convection is a mechanism, or type of heat transport, in…

Q: The interior walls as well the ceiling and the floor of a room are all at Tg = 10 deg C. The room…

Q: Heat Conduction The wall (thickness L) of a furnace, with inside temperature 800° C, is comprised of…

Q: 40: A circular ball, 1 in. in range and at a temperature of 800°F, is out of nowhere extinguished in…

Q: A steam pipe with outside diameter 10 mm, passes through a room, the surface temperature of the pipe…

Q: The wall (thickness L) of a furnace, with inside temperature 800° C, is comprised of brick material…

A: Given that, Inside temperature, Ti=800 °C,Thermal conductivity=0.02 W/m·K,Wall thickness=12…

Q: 21. A horizontal pipe delivers steam at 1 MPa and a rate of 100 kg/s to a steam turbine. The pipe…

A: given; outer diameter (D1)=11.5cm =0.115minner diameter (D2)=96.5cm…

Q: To avoid overheating, natural convection analysis is to be considered. If the minimum allowable heat…

A: Write the given data in the problem. Ts=45°CTa=32°C Q=30 W Here, Ts is the surface temperature, Ta…

Q: Q4. A block of pure aluminum, initially at 90°C, is placed in front of a fan. ASsuming lumped…

A: given data al block initially at 90 degree C

Q: number 1 A food product containing 82% moisture content is being frozen. Estimate the specific heat…

A: A food product with 82% moisture content,82% of the water is in frozen state ,specific heat of dry…

Q: -W iron plate has a thickness of 4 mm, cross-sectional area of 340 cm^2 . The room convection heat…

Q: QUESTION-) 236 °C steam flows in a pipe which features are given below. Inner and outer diameters…

A: tempertaure of steam in the pipe, Ts=236oc=236+273=509Kinner diameter of the pipe,…

Q: (Heat Transfer) A furnace wall is composed of 20.32cm of fireclay brick (k=1.32 W/m^2.k), 10.16cm…

A: giventhcikness of fireclay t1=20.32cmand K1=1.32W/m2Kthcikness of mineral wool…

Q: ile using the Heisler charts for a cylinder at time t = 10 sec and at a radial location of r/rq=0.6…

A: Given data as per questionQo=ρcpV(Ti-T∞)ρ=2700 kg/m3Cp=900 J/kg°CV=0.1 m3T∞=20°CTi=55°C

Q: A convection problem has a Nusselt number equal to 10. where the contribution of diffusion is…

A: Solution: The correct option with the necessary explanation is given below:

Q: Steel pipe 1 cm thick, 1.0 m long and 8 cm deep, covered with 4 cm thick insulation. The wall…

Q: 9. Water is heated by a 200 mm by 200 mm vertical flat plate which is maintained at 60°C. Find the…

Q: A certain liquid flow inside a 4 cm diameter pipe, 6 meter long with an entering temperature of 350…

A: Given data: di=4 cmL=6 mT=350°CTw=575°Cm˙=60 kg/minPr=0.003μ=0.003 N.s/mk=6.2 w/m-k, Cp=0.41 kj/kg-k…

Q: based on a large 4 cm thick plate that is initially at a uniform temperature of 20°C that is heated…

Q: , cross-sectional area of 320 cm^2 . The room convection heat transfer coefficient is 25 W/(m^2K)…

Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

In convection heat transfer, what mechanism heat transfer where the fluid moves due to the decrease in its density caused by
increase in temperature?
Select the correct response:
O Natural convection
Forced convection
Density convection
Radical convection

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps

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

5.10 Experiments have been performed on the temperature distribution in a homogeneous long cylinder (0.1 m diameter, thermal conductivity of 0.2 W/m K) with uniform internal heat generation. By dimensional analysis, determine the relation between the steady-state temperature at the center of the cylinder , the diameter, the thermal conductivity, and the rate of heat generation. Take the temperature at the surface as your datum. What is the equation for the center temperature if the difference between center and surface temperature is when the heat generation is ?
2.3 The shield of a nuclear reactor is idealized by a large 25-cm-thick flat plate having a thermal conductivity of . Radiation from the interior of the reactor penetrates the shield and there produces heat generation that decreases exponentially from a value of at the inner surface to a value of at a distance of 12.5 cm from the interior surface. If the exterior surface is kept at 38°C by forced convection, determine the temperature at the inner surface of the field. Hint: First set up the differential equation for a system in which the heat generation rate varies according to .
the hot combustion gasses of a furnace are separated from the ambient air and its surroundoing which are at 25c, by a brick wall 0.15 meter thick has a thermal conductivity of 1.2 w/(m-k) and a surface emissivity of 0.8. under steady state condition and outer surface temperature of 100c is measured. the convection heat transfer to the air adjoining this surface is characterized by a convection of 20 /(m-k), what is the inner temperature?
A certain liquid flow inside a 4 cm diameter pipe, 6 meter long with an entering temperature of 350 C. the wal temperature is maintained at 575 C, and the mass flow rate of the metal is 60 kg/min. p=6000 kg/m, Npr = 0.003, m = 0.003 N-s/m, k = 6.2 w/m-k, Cp = 0.41 kj/kg-k. what is the convection coefficient of the liquid (w/m-k)
The composite wall of an oven consists of three materials, two of which are ofknown thermal conductivity, kA = 25 W/m ⋅ K and kC = 60 W/m ⋅ K, and knownthickness, LA = 0.40 m and LC = 0.20 m. The third material, B, which is sandwichedbetween materials A and C, is of known thickness, LB = 0.20 m, but unknownthermal conductivity kB. Under steady-state operating conditions, measurementsreveal an outer surface temperature of Ts,o = 20°C, an inner surface temperature ofTs,i = 600°C, and an oven air temperature of T∞ = 800°C. The inside convection coefficient h is known to be 25 W/m2 ⋅K. Neglecting convection transfer effect,what is the value of kB?
Hi, can you help me with the following problem? A thermally insulated tank of water 2 m x 2 m, depth 1 m is stirred with a paddle for threehours. If the paddle is driven by a motor whose shaft power is 8 kW determine the rate ofchange of temperature in degrees C per hr and the increase in temperature of the water.The specific heat of water is 4200 J/kgC. Identify a system and start your analysis from anappropriate form of the Fist Law of Thermodynamics
How important the forced and free convection know as a mechanical engineer?
A food product with 80% water content in a 10 cm diameter can be frozen. Mass of the product type is 1000 kg / m³, thermal conductivity is 1.0 w / (m k), and the frozen early temperature is -1.75 ° C.After 15 hours in the freezing medium -25 ° C, the temperature of the product becomes -10 ° C. Estimating the coefficient of moving the heat of the medium freezing convection. Assume cans as an unlimited cylinder. H = Answerw / (m² k).
A plane slab, 8.5 cm thick, is generating heat uniformly at the rate of 12962 W/m-3. It is fully insulated on side, while the other side is exposed to 48 deg C air blasted by a blower resulting in a convection coefficient of 125 W m-2 K-1. Assuming 1D, SS heat transfer with negiligible radiation, estimate the slab temperature where it is in contact with the air. Enter your answer in deg C using 3 significant digits.
Determine if the following heat transfer scenario can be simplified to steady heat transfer by putting S and/or to one-dimensional heat ttransfer by putting 1D. Write short explanation of your answer on what are the assumptions needed to fit in these simplifications, Heat transfer in a hot egg placed into a refrigerator where temperature inside the evaporator is maintained by the refrigeration system. Baseplate of a cloth iron subjected to uniform heat flux generated by the resistance heaters inside and outside surface loses heat to the surroundings. Heat loss in imperfectly insulated pipe as the generated steam from boiler passes inside and the outside surface is exposed to cold environment.
(Heat Transfer) A furnace wall is composed of 20.32cm of fireclay brick (k=1.32 W/m^2.k), 10.16cm mineral wool (k=0.039 W/m^2.k), and 10.16cm of common brick (k=0.69 W/m^2.k). The surface temperature of the common brick is 60°C and the interface temperature between the common brick and the mineral wool is 30°C. The temperature of the gases is 1000°C and the temperature of the outside air is 30°C. Determine the outside air coefficient hc=W/m^2.k
Water at a temperature of T∞ = 25°C flows over one of the surfaces of a steel wall (AISI 1010) whose temperature is Ts,1 = 40°C and thermal conductivity of steel is 67.1 w/m.k. The wall is 0.35 m thick, and its other surface temperature is Ts,2 = 100°C. For steady state conditions what is the convection coefficient associated with the water flow?