STUDYAND SIMULATION OF FLUID-PARTICLE FLOW IN PIPE BEND

Abstract

A dilute, particle-laden flow in a pipe with a 900 bend is modelled using a RANS approach, coupled to a second-moment turbulence closure, together with a Lagrangian particle tracking technique, with particle dispersion modelled using a stochastic approach that ensures turbulence anisotropy. Detailed predictions of particle mass concentaion profile at angle cut of 00, 15° and 45° f'or particles of I j.un. 50im. I 00tiii diameter paticles and particle velocities are validated through comparisons of predictions with experimental measurements made for gas—solid flows in a vertical-to-horizontal flow configuration. Reasonable agreement between predicted first and second moments and data is found for both phases, with the consistent application of anisotropic and three-dimensional modeling approaches resulting in predictions that compare favorably with those of other authors, and which provide fluctuating particle velocities in acceptable agreement with data.