What method of heat transfer is known as conduction?
When the heat is transfered through direct contact
What are the mechanisms of heat transfer which are necessary to consider while designing the car radiators?
There are three methods of heat transfer, conduction, convection and radiation. Of these, the two which are important are conduction and convection. Convection is the heat transfer method as cooler air passes between the fins of the radiator, and conduction is the transference of heat from the hot coolant to the metal fins.
Heat conduction (or thermal conduction) is the transfer of internal energy by microscopic diffusion and collisions of particles or quasi-particles within a body due to a temperature gradient. Convective heat transfer, often referred to simply as convection, is the transfer of heat from one place to another by the movement of fluids. Convection is usually the dominant form of heat transfer in liquids and gases. Although often discussed as a distinct method of heat transfer…
What process is a method of heat transfer but it does not contribute to the moving heat energy in and around the earth?
Convection is probably the most important, as weather is largely the result of the movement of air masses. Conduction happens when air warms when in contact with a hot surface, and radiation is involved when the Sun sends us the energy in the first place, and perhaps also when heat is radiated into space from the Earth's night side.
Radiation in heat transfer is one of three known modes of heat transfer: conduction (as heat transfer in solids and less effective in liquids)), Convection (as in liquids and gases), and radiation (that not necessarily require a medium for the transfer). Heat of sun is transferred to us in the vacuum space by radiation heat transfer.
Conduction . . . depends on the properties of the material through which the heat is conducted Convection . . . depends on the physical movement of the material carrying the heat from level to level Radiation . . . electromagnetic waves, moving from place to place at the speed of light. Looks like Radiation would transfer heat the fastest.