“…The question of identification of the specific rate h e of interphase heat transfer in Eqs. (I.1) of the two-temperature model, which was analyzed particularly thoroughly for granular systems by Antonishin with his coworkers [10,11], is even more complicated. Without going into details, we wish to point out that virtually all the suggestions on defining this quantity reduce to the expression h e = α e ρ 1 c 1 S (τ 1 − τ 0 ) , (I.6)…”