logo

Video encyclopedia

Heat flux

2:20

What is Heat Flux? Explained!

3:56

What is Heat Flux? | SKILL-LYNC

3:36

Why measure heat flux

2:27

Heat flux

3:27

What is a heat flux sensor and how does it work

Heat flux or thermal flux, sometimes also referred to as heat flux density or heat flow rate intensity is a flow of energy per unit of area per unit of time. In SI its units are watts per square metre (W⋅m−2). It has both a direction and a magnitude, and so it is a vector quantity. To define the heat flux at a certain point in space, one takes the limiting case where the size of the surface becomes infinitesimally small.
  • Fourier's law 

  • Measuring heat flux 

  • Relevance to science and engineering