NUMERICAL STUDY OF NON-NEWTONIAN FLOWS WITH SOLID PARTICLES IN PIPES AND ANNULAR CHANELS

The paper presents the results of modeling non-Newtonian flows with solid particles using the single-fluid model proposed by the authors. The proposed model was verified and validated on problems of steady-state turbulent flow of a non-Nontonian fluid with heavy particles in a horizontal pipe and an annular channel. Using a drilling fluid modified with carbon nanotubes as an example, the influence of fluid rheology on the reliability of modeling was studied. By comparison with experimental data, DNS-DEM modelling data and calculations performed using the two-fluid model of granular media, it is shown that the proposed model can satisfactorily predict the distribution of particle concentration and pressure drop in the channels.