Thermal Conductivity, Thermal Convection and Thermal Radiation

 Thermal Conductivity.  
The thermal conductivity is in the heat propagation within a solid body, heated unevenly or between different solids in direct contact.

Thermal Convection  
Convection is the process of heat transfer made ​​through the transport of matter from one region to another. Convection is the process that can only occur in body fluids, since the solid particlescan not be washed away.

Thermal Radiation  
Heat is energy in transit. This energy is transported by means ofelectromagnetic waves in the infrared frequency. In heat transfer by radiation, this fact is more evident.