I need an explanation for the modes of heat transfer from the electrode tip to the arc. i have come across papers stating conduction, convection and radiation to be the answer but I am not getting any explanation regarding the same.
Conduction is the heat transfer through material that is associated with a temperature gradient and not with bulk motion (e.g. heating transferring from the hot source through the solid (or liquid or gas) to the molten pool. If there is not temperature gradient, this source is zero.
Convection is the heat transfer associated with the movement of fluids at different temperatures (e.g., molten metal flowing to the pool). If there is no fluid (gas or liquid) motion, this source is zero.
Radiation is the heat transfer associated with electromagnetic emission or absorption on surfaces at different temperatures or, in simpler terms, the heat associated with radiation emission from any hot surface to a cool surface (e.g., the heat you feel at the side of any hot source when the surrounding air is still cool). If there is no temperature difference, this source is zero.
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