Differences between thermodynamics and fluid mechanics?

thermodynamics:

1) it deals with the equilibrium states of matter & precludes the existence of a temp. gradient.

2) when a system changes from one equilibrium state to another, thermodynamics helps to determine the quantity of work & heat interactions. it describes how much heat exchange during a process is required but doesn't hint on how the same could be achieved.

heat transfer:

1) it is inherently a non equilibrium process since a temp. gradient must exist for the heat transfer to occur

2) it helps to predict the distribution of temp across a surface and to determine the temp. gradient that exists between different surfaces