No! Conductive heat transfer is through direct contact because of, e.g., coupling (for example, in a solid where local vibrations propagate to neighboring lattice sites) or free electrons in metals. No radiation is ever emitted or absorbed.seb7 said:So, is conductive heat actually being transferred by radiation?
Fair enough. The irony was lost on me.BvU said:The governing force in collisions between molecules is electromagnetic, hence my slightly ironic first reply.
I would say no. The reason that we split heat into conduction, radiation, and convection is that different equations are used. You could say it is all radiation but then you would have to distinguish between contact radiation and distant radiation in order to use the right equationsseb7 said:So, is conductive heat actually being transferred by radiation?
That's a good observation and effectively sorts out the problem.Dale said:The reason that we split heat into conduction, radiation, and convection is that different equations are used.
Electromagnetic interaction is not equivalent to "radiation". The atoms in a solid transfer thermal energy without emitting any electromagnetic radiation.BvU said:The governing force in collisions between molecules is electromagnetic, hence my slightly ironic first reply.
The three types of heat transfer are conduction, convection, and radiation. Conduction is the transfer of heat through a solid material, convection is the transfer of heat through a fluid (such as air or water), and radiation is the transfer of heat through electromagnetic waves.
These types of heat transfer differ in the way heat is transferred. In conduction, heat is transferred through direct contact between two materials. In convection, heat is transferred through the movement of a fluid. In radiation, heat is transferred through electromagnetic waves without the need for a medium.
The most efficient type of heat transfer depends on the specific situation. In some cases, conduction may be the most efficient, while in others, convection or radiation may be more efficient. For example, in cooking, convection is often the most efficient method of transferring heat.
Heat transfer is used in many everyday activities and devices. For example, conduction is used in cooking, convection is used in heating and cooling systems, and radiation is used in microwave ovens and solar panels.
Yes, heat transfer can be controlled through various methods. Insulation can be used to reduce heat transfer through conduction or convection. Reflective surfaces can be used to reduce heat transfer through radiation. Additionally, heat transfer can be controlled by adjusting the temperature difference between two materials.