# Conduction vs/or Diffusion

In context of heat transfer, are conduction and diffusion same process?

## Answers and Replies

Chestermiller
Mentor
Are you asking about the physical properties Thermal Conductivity and Thermal Diffusivity?

Dhananjay Singh
Are you asking about the physical properties Thermal Conductivity and Thermal Diffusivity?

No, I know thermal conductivity and thermal diffusivity are different physical properties. Thermal diffusivity is the ratio of thermal conductivity of material to the product of its density & specific heat capacity. I want to know about the difference in the process (at microscopic level) and definition of Conduction & Diffusion.

In context of heat transfer, are conduction and diffusion same process?
Diffusion of heat usually means spreading of heat to a wider volume either through any or all of heat transfer mechanisms i.e conduction, convection or radiation.

Conduction is one of the three mechanisms of heat transfer that happens through static physical contact between two or more bodies.

Dhananjay Singh
thank you for the most reasonable answer.