Difference between Thermodynamics and Heat transfer

Difference between Thermodynamics and Heat transfer?

Thermodynamics and Heat transfer are both interlinked subjects. Thermo is overall energy and heat is one form of energy, here the difference between thermodynamics and heat transfer is observed by knowing about transformation and transfer.
In Heat transfer, the heat directly flows from high temperature to low temperature. but through thermodynamics, the heat is converted into work with the help of an external heat engine is known as heat transformation which is a thermodynamic process.