Question

How convection and conduction is interrelated?​

Answer 1

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• Conduction usually occurs in solids, through molecular collision. Convection occurs in fluids by mass motion of molecules in the same direction.

• The transfer of heat is through heated solid substance, in conduction, whereas in convection the heat energy is transmitted by way of intermediate medium.

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Answer 2

Answer:

• At a fundamental level, it is common to say that there are only two modes of heat transfer, not three. The two modes are conduction and radiation. Convection is held to be a phenomenon inclusive of both. So, in answering the question about the commonalities between conduction and convection, if viewed in terms of a Venn Diagram, there is nearly a complete overlap between conduction and convection.

• Less fundamentally, when learning of the basics of convection one is typically taught about the no-slip condition (a topic in fluid dynamics) where the fluid over the surface has a zero velocity. The fluid layer with the zero velocity conduct heat from the surface to the fluid… this will be an elementary example of complete conduction at the surface between the interchange. Thus, convection begins with pure conduction into the fluid. After which, the properties of the fluid will determine the heat transfer beyond that point - this is what is commonly referred to as convection.....