Non-stationary non-isothermal flow of gase mix in the sea gas pipelines

The paper presents a mathematical model of shock free non-stationary non-isothermal turbulent flow of viscous nonideal chemically inert multicomponent gas mix in the sea circular cross section gas pipelines with rigid multilayer coating. Flow characteristics calculation results for the problem of finding long-term flow periodic behavior in the conditions of periodic rate change on the right end are provided.