If we mix hot water and cold water, what type of heat transfer does this correspond to: conduction, convection?

or radiation?...





And could you give me an example of the other two types of heat transfer?...|||This one is definitely not radiation, things that emit electromagnetic waves or photons fall under that category. To determine if this is conduction or convection is a matter of movement. This would be a convection scenario if the bulk of the water was moving, like hot water over a cold pipe or you were mixing things. Conduction applies if there is no fluid motion, like a warm house surrounded by still, cold air or a metal plate with one warm side and the other cold. I imagine that combining the two fluids would inherently force them to move in a swirling/mixing fashion, it would be classified as convection. Unless, you found a way to combine them soooo slooooowly, the change is discretized enough (think of slowly adding really tiny metal balls to a large container) allowing the temperature to reach equilibrium after each addition, Then it could be approximated as conduction. Hope this helps