If a planet with an atmosphere and a flat surface is always directed with the same side to the sun (or star), how does the (nonstatic) thermodynamic equilibrium look like?
Has eventually an equilibrium developed in which there is a constant heat transfer through the planet from the sunlit side to the dark side?
And besides that, a constant heat transfer from the sunlit side to the dark side develops by means of heat transfer by wind fields in the atmosphere?
An equilibrium will certainly develop while the incoming energy on the sunlit side will be the same as the outgoing energy on the dark side.
How does this wind field look like in the (non-static) equilibrium? Will there develop a constant high pressure on the sunlit side and a constant low pressure on the dark side, balancing each other, causing heat only to be transferred by heat conduction, or will winds develop, causing heat to be transferred by convection?