Abstract
For solid particles being conveyed pneumatically by a gas through a pipe elbow, the uniformity of the particles has a strong influence on the conveying effect. In particular, bundling of the particles can cause dissipation of kinetic energy. In this study, after comparison with the renormalization group (RNG) k-ε model and with experimental data, a flow prediction model based on a large eddy simulation (LES)-discrete phase orbit model (DPM) was developed based on the Euler-Lagrange approach. Numerical modelling was done by combining LES code and DPM code to predict the impact of elbows with diverse bend angles and inlet velocities on pneumatic conveying. Results show that as the conveying speed increases, the total pressure drop of the system increases monotonically and the stability of the particle motion is reduced. • A LES-DPM-based flow prediction model is proposed. • The experimental data of LES-DPM model is more consistent than that of RNG K-ε model. • Velocity, particle size and Angle have important effects on elbow flow. • It is of great engineering significance to study gas-solid two-phase flow in elbow.
Published Version
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