Heat current

A heat current is a kinetic exchange rate between molecules, relative to the material in which the kinesis occurs. It is defined as d Q d t {displaystyle {frac {dQ}{dt}}} , where Q {displaystyle Q} is heat and t {displaystyle t} is time. A heat current is a kinetic exchange rate between molecules, relative to the material in which the kinesis occurs. It is defined as d Q d t {displaystyle {frac {dQ}{dt}}} , where Q {displaystyle Q} is heat and t {displaystyle t} is time. For conduction, heat current is defined by Fourier's law as