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Questions tagged [thermal-conductivity]

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Derive expression for heat flow from oil bath to metal sphere

A spherical ball of iron is put into a hot bath of oil. The iron ball is initially at a low temperature and heat transfer from the oil to the iron will increase the temperature of the iron ball. ...
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Thermal conductivity of materials [closed]

Why does having delocalised electrons increase a materials thermal conductivity?
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What emits the least light when hot?

What sudstance emits the least light or radiation when hot with the highest vapor pressure point in a vacuum? https://space.stackexchange.com/questions/35486/shielding-capability-of-liquid-metals
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Temperature profile at steady state [closed]

Consider a solid wall consisting of three layers where the layers are of equal thickness but made out of different materials: $\ce{Layer 1}$ is made out of copper (high thermal conductivity), $\ce{...
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2answers
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Determine heat flux from temperature profile

The heating element and the insulator are of equal thickness L. Heat transfer in the air film adjacent to the heater is assumed negligible. I've noticed that I find these type of problem the ...
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2answers
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Pre-Hydrogen Feature On the Output Of a Gas Chromatography Thermal Conductivity Detector

A candidate for "dark matter", predicted and now apparently detected to have both a higher thermal conductivity and higher diffusion rate than H2 is purported in this PowerPoint Presentation file. ...
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2answers
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Heat transfer through layered wall

An electrical heater is placed between two layers of insulation. The three layers (the heater and the two layers of insulation) have the same thickness. The figure below shows different temperature ...
3
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1answer
44 views

Equation for overall heat transfer coefficient

The heat flow (in $[\pu{J/s}]$) through the wall of a tube of length $L$ and inner radius $R_0$ is $$Q = (2πR_0L)U(T_{1\infty} - T_{2\infty}),$$ where $T_{1\infty}$ is the bulk temperature ...
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1answer
472 views

Graphite: Thermal and electrical conductivity

I recently encounter this question: Compare, while providing an explanation, the thermal and electrical conductivity of graphite to that of diamond. Provided answer: Graphite conducts electricity(...
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Why would a ~1 cm thick layer of argon be a significantly poorer conductor of heat than air?

In yesterday's new Periodic Video, Argon (new) - Periodic Table of Videos, after about 07 min 00 sec, Sir Martyn Poliakoff says: The final, and I have to admit perhaps slightly boring application ...