thermal conductivity vs pressure

[boldfish]

How does the thermal conductivity of air (and water) vary with increasing pressure?

What about gases in general?

Can anyone provide guidance here?

 

[ko99]

Some articles that describe thermal conductivity of air:

vs Pressure

http://www.electronics-cooling.com/html/2002_november_techdata.html

vs Temperature

http://www.electronics-cooling.com/html/2001_feb_techdata.html

vs Humidity

http://www.electronics-cooling.com/html/2003_november_techdata.html

ko (

http://www.ecooling.biz)

 

[zerok]

Boldfish,

see the excellent book by Poling el al. "The properties of gases and liquids".

zerok

 

[speco]

Boldfish,

Generally the answer is yes for gases, no for liquid water.

In general, the thermal conductivity of gases increases with both pressure and temperature, but more related to temperature than pressure. The effect is negligible for fairly low pressures (near atmospheric), but becomes more significant at a few hundres PSI or so.

Regards,

speco (

http://www.stoneprocess.com)

 

[EdStainless]

It has a lot to do with mean-free-path in a gas. You do like statistical physical chemistry, don't you?

= = = = = = = = = = = = = = = = = = = =
Corrosion, every where, all the time.
Manage it or it will manage you.

http://www.trent-tube.com/contact/Tech_Assist.cfm

 

[athomas236]

You will find the conductivity of water with varying pressure in any set of steam tables

 

[25362]

Pure gas (nitrogen, oxygen, etc.) thermophysical properties including thermal conductivity at a wide range of pressures are given in

http://webbook.nist.gov/chemistry/

 

[25362]

I should have added water to the list of pure substances the properties of which can be found in the same site.