since two of the three methods of heat transfer (conduction and convection)
This always drives me nuts. Convection is conduction, just in a fluid. Conduction and radiation are two entirely different physical processes.
This always drives me nuts. Convection is conduction, just in a fluid. Conduction and radiation are two entirely different physical processes.
In low g environments, convection due to density changes doesn't happen (hot air does not rise) which means heat pools around bodies at rest.
Edit: after reading the article a bit, i see that you were quoting a section that ends with "...(conduction and convection) cannot occur without matter." Which does make the distinction the author was making a little more less useful. However lack of convection is an issue inside the space station where fans must be installed to keep air from pooling around heat sources like lights and human bodies.
Conduction means you touch something and that something slowly gets hotter and conducts heat away from your body. You can calculate how fast the energy is transferred based on properties of the material and geometry of objects and their interface.
Convection means you touch something and that something is constantly being replaced. You can't use the formula for conduction here.
In case of convection, the basic mechanism of energy being moved has nothing to do with conduction, rather with movement (replacement) of the material that takes away the heat.
How is moving heat by moving the material and moving heat by letting it to dissipate through stationary material not two different processes?
But I guess the particle interaction comes from photon exchange, on the other hand the frequencies are different enough I think you can safely call it a different thing (like how UV and AM radio are different.)