My watch list  

Heat flux

Heat flux or thermal flux is a change in energy over a given area and time. Heat is represented by the symbol Q.

The heat transfer rate, or heat flow per unit time, is denoted by:

\dot{Q} = {dQ\over dt} \,\!.

It is measured in watts in SI units (a watt is one joule per second).

Heat flux is defined as rate of heat transfer per unit cross-sectional area, and is denoted q, resulting in units of watts per square meter, though slightly different notation conventions can be used.

See also

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Heat_flux". A list of authors is available in Wikipedia.
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE