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

Themodynamic, vacuum gauge indicates that the pressure of air in a closed c...

vacuum gauge indicates that the pressure of air in a closed chamber is 0.2bar(vacuum).The pressure of the surrounding atmosphere is equilent to a 750-mm column of mercury.The densi

Compute efficiency of dual cycle, (a) Compare 2 two-stroke cycle engines wi...

(a) Compare 2 two-stroke cycle engines with 4 stroke cycle engines. What are the function of flywheel and Cam Shaft? (b) Derive a mathematical expression for efficiency of dual

Belt and rope friction, what is the effect of a warm groove on the performa...

what is the effect of a warm groove on the performance of the V belt

Thermal, diference between thermal and thermodynamic equallibrim

diference between thermal and thermodynamic equallibrim

Computer control system in flexible manufacturing system, Computers control...

Computers control system in flexible manufacturing system

Head loss, calculate the head required

calculate the head required

Calculate the tension t in the rope, Calculate the tension T in the rope: ...

Calculate the tension T in the rope: Q: A man raises 10 Kg joist of length 4m by pulling on rope, Find out the tension T in the rope and reaction at point A for the posit

Concept of torque speed variation in transmission system , Concept of Torqu...

Concept of Torque (Speed) Variation in Transmission System: When two different size gears are running at same speed, then the small gear makes more revolution than the big gear. T

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