Open main menu
Home
Random
Recent changes
Special pages
Community portal
Preferences
About Wikipedia
Disclaimers
Incubator escapee wiki
Search
User menu
Talk
Dark mode
Contributions
Create account
Log in
Editing
Glass wool
(section)
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
== Principles of function == Gases possess poor [[thermal conduction]] properties compared to liquids and solids<ref>{{Cite book|url=https://books.google.com/books?id=dsMO-O8Gy4MC&q=Gases+possess+bad+thermal+conduction+properties+compared+to+liquids+and+solids&pg=PA137|title=The Coen & Hamworthy Combustion Handbook: Fundamentals for Power, Marine & Industrial Applications|last1=Londerville|first1=Stephen|last2=Baukal|first2=Charles E. Jr.|date=2013-03-25|publisher=CRC Press|isbn=9781439873335|language=en}}</ref><ref>{{Cite book|url=https://books.google.com/books?id=RXuFy0Il8uQC&q=Gases+possess+bad+thermal+conduction+properties+compared+to+liquids+and+solids+making+them+good+insulation+material&pg=PA11|title=HEAT TRANSFER: PRINCIPLES AND APPLICATIONS|last=K|first=DUTTA, BINAY|date=2000-01-01|publisher=PHI Learning Pvt. Ltd.|isbn=9788120316256|language=en}}</ref> and thus make good insulation material if they can be trapped in materials so that much of the heat that flows through the material is forced to flow through the gas.<ref>{{Cite book|url=https://books.google.com/books?id=K2BjqY8W9iEC&q=trapped+gases+make+for+good+insulating+material&pg=PA147|title=Technical Diving: From the Bottom Up|last=Gurr|first=Kevin|date=2004|publisher=Periscope Publishing Ltd.|isbn=9781904381204|language=en}}</ref> In order to further augment the effectiveness of a gas (such as air) it may be disrupted into small cells which cannot effectively transfer heat by [[natural convection]]. Natural convection involves a larger bulk flow of gas driven by buoyancy and temperature differences, and it does not work well in small gas cells where there is little density difference to drive it, and the high surface area to volume ratios of the small cells retards bulk gas flow inside them by means of viscous [[drag (physics)|drag]]. In order to accomplish the formation of small gas cells in man-made [[thermal insulation]], glass and polymer materials can be used to trap air in a foam-like structure. The same principle used in glass wool is used in other man-made insulators such as [[rock wool]], [[Styrofoam]], [[wet suit]] neoprene foam fabrics, and fabrics such as [[Gore-Tex]] and [[polar fleece]]. The air-trapping property is also the insulation principle used in nature in [[down feather]]s and insulating hair such as natural wool.
Edit summary
(Briefly describe your changes)
By publishing changes, you agree to the
Terms of Use
, and you irrevocably agree to release your contribution under the
CC BY-SA 4.0 License
and the
GFDL
. You agree that a hyperlink or URL is sufficient attribution under the Creative Commons license.
Cancel
Editing help
(opens in new window)