Abstract
The key issue associated with the industries is the transportation and dumping of solids particulates in the form of slurry at the desired place using long length pipelines. In this perspective, numerical simulation of three-dimensional horizontal slurry pipeline of 0.0549 m diameter using Eulerian two-phase model with RNG k-ɛ turbulence closure is carried out. The glass - beads solid particulates having density ( = 2470 kg/m3) and slurry concentration varies as 10% to 50% (by volume) for velocity ranges of 3-5 ms-1. The computational modeling is done using available commercial software ANSYS Fluent for 125µm and 440 µm particulate size at different velocity and concentration range to know their effect on slurry flow characteristics. It is observed that for chosen particulate size pressure drop increases with increase in velocity at all solid concentration range. The pressure drop in slurry for 440 µm solid particulates is found higher as compared to the pressure drop of 125 µm solid particulates slurry. The percentage change in pressure drop is also reported in the paper due to particulate size effect at all velocity and solid concentration. The obtained results of predicted pressure drop are analytically compared with the available experimental results of literature and are in synchronism with that. A parametric study is carried out with the aim of visualizing and understanding the solid particulate size effect on slurry flow characteristics. Finally, the results of settling solid concentration contour, velocity contour, concentration profiles, velocity profiles and vector representation of concentration/velocity were also predicted for chosen particulates sized slurry.
Highlights
Transportation of solid with water as a carrier has been employed by various industries since several decades
Figures (2-7) depict the settling behavior of solid particulate size 125 μm and 440 μm for chosen range of velocity (Vm = 3-5 ms-1) at different solid concentration ranging from 10 % – 50 % at pipe outlet
Solid velocity contours Figures (8-13) depict the velocity contours of solid particulate size 125 μm and 440 μm at different solid concentration ranging from 10 % – 50 % at pipe outlet
Summary
Transportation of solid with water as a carrier has been employed by various industries since several decades. It has been found that Eulerian model gives better results for pressure drop as compared to the mixture model Later, they experimented mixture of fly ash at high concentration on Pilot plant test loop and projected the rheological characteristics of slurry. Singh et al [25] predicted the flow characteristics of ash – water flow in a pipe of 0.050 m diameter using Eulerian- Lagrange SST K-ω turbulence model for a wide range of velocity and solid concentrations. An attempt has been made to develop a computational model for prediction of concentration, velocity and pressure drop profiles for glass beads particulate size of 125 μm and 440 μm using Eulerian two-phase model with RNG k-ɛ turbulence closure. The following governing equations are used for the turbulent flow of glass beads slurry flow
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
