Hydrodynamic Features of Two-Phase Oil-Gas Flow in Pipelines

The paper presents the investigations results of the transport process of the fluid flow through a pipeline under conditions of temperature gradient between the internal and external environments and continuous gas generation at the contact boundary of the transported media. In the non-isothermal flow case, a slippage effect will impact the flow velocity, the pressure and the temperature distributions in variable cross section pipes. Laboratory experiments were conducted in order to study the effects of the gas nucleus at the pipe walls on the hydrodynamic characteristics of the fluid flow. It is shown that a throughput capacity of the pipe is affected by the temperature difference between the oil and the pipe walls. At certain temperature gradient on the border layer, the pipe capacity reached a maximum value.