Thermal processes in natural gas pipeline transport
A commonly used premise in pipeline hydraulics where the work of friction forces performed at the movement of real gas in the gas pipeline completely turns into thermal energy is veriﬁed in the article. By means of the integral deﬁnition of Clausius entropy, it is shown that the premise of the conversion of friction forces into thermal energy of gas ﬂow is justiﬁed with an acceptable accuracy for engineering applications in relation to the one-dimensional formulation of the task regarding the determination of the longitudinal temperature ﬁeld of gas.