Finding Flow of non-Newtonian Fluids in Circular Pipe with Wall-Adjacent Gas Layer

L. Ilina, P. Vasilyev, M. Krasnodubrovsky

Abstract


Existing models of the flow of highly viscous liquids with a near-viscous near-wall layer in a circular pipe, used to develop devices for creating such a process of transporting viscous and highly viscous liquids, are considered. Based on the well-known mathematical model of a two-layer ring flow of a non-Newtonian fluid with a low-viscosity boundary layer, the numerical parameters of the process of the flow of fuel oil with a near-gas layer are obtained. An experimental setup with a device for creating a two-layer ring flow has been developed. An experimental study of this process. The experimental values of the flow rate of the main fluid and gas to ensure a stable ring flow are obtained. A regression equation is obtained to determine the cost of transported fuel oil and air, to create a near-wall gas layer. Methods of mathematical statistics confirmed the adequacy of the regression equation for determining the consumption of fuel oil in a round pipe with a wall gas layer.

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DOI: http://dx.doi.org/10.24892/RIJIE/20190205

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