Thermal conductivity-ceramics-refractory , Mechanical Engineering

Assignment Help:

Thermal Conductivity

The amount of heat passing throughout unit cross-section of a solid material in unit time for unit thermal gradient is termed as thermal conductivity. The units of thermal conductivity are as: JH/m/s/K or else W/m/K. The heat conduction arises from higher temperature to lower temperature such is opposite to direction of thermal gradient.

The thermal conductivity in solid material is because of:

i.  Elastic vibration of atoms or molecules whereby energy is transmitted in from of kinetic energy of vibrating units, and

ii. Movement of electrons.

Given figure shows the variation of thermal conductivity throughout temperature for metallic materials.

                                                         450_Thermal Conductivity.png

                                   Figure: Thermal Conductivity of Metals varying with Temperature


Related Discussions:- Thermal conductivity-ceramics-refractory

Explain the deformation processes, Deformation Processes In these proce...

Deformation Processes In these processes, the material is plastically deformed (hot or cold) under the action of an external force, to produce the required shape. No material i

Scope of pipeline systems, Q. Scope of pipeline systems? This specifica...

Q. Scope of pipeline systems? This specification covers the specific materials, surface preparation, method of application, quality assurance, and repair necessary for the appl

Equilibrium, Ask question #Minimum 100 words accepA rope of negligible mass...

Ask question #Minimum 100 words accepA rope of negligible mass is stretched horizontally between two supports that are 3.44 m apart.When an object of weight 3160 N is hung at the c

Separator-battery components , Separator:   Separator works as insulator b...

Separator:   Separator works as insulator between positive and negative plates. These separators are placed between each pair of plates.

Position of centre of gravity of the frustrum of a cone, Position of centre...

Position of centre of gravity of the frustrum of a cone: situate the position of C. G. of the frustrum of a cone with height H = 12 cm and with  diameter 8 cm and 12 cm at top

Thermodynamics, what is dryness fraction of dry air

what is dryness fraction of dry air

Find out maximum bending stress induced in beam, Q. A beam made of C.I. hav...

Q. A beam made of C.I. having section of 50mm external diameter and 25 mm internal diameter is supported at 2 points 4 m apart. The beam carries concentrated load of 100N at the ce

What do you mean by rigid bed models, Q. What do you mean by Rigid bed mode...

Q. What do you mean by Rigid bed models? Models with rigid boundary and geometrically similar form are used in studies connected with outlet works, stilling basins, spillways

Power plants, explain different power plants..???

explain different power plants..???

Thermodynamics assignment, The steam that leaves the super-heater is expand...

The steam that leaves the super-heater is expanded from 130bar at 535°C to 25.2bar at 310°C in a high pressure turbine. The steam from the exit of the HP turbine is reheated to 535

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd