At contact surfaces between a fluid and a solid wall, there is always a thin layer of fluid through which the
heat is transferred by conduction. Whenever there is an appreciable movement
of the fluid, conduction heat
transfer in fluid may be neglected compared with convection heat transfer.
The heat transfer from the solid surface to the fluid can be described by
Newton's law of cooling. It states
that the heat transfer, dQ/dt, from a solid surface of area A, at a
temperature Tw, to a fluid of temperature T,
is:
is the heat transfer coefficient. Related topics: