Original scientific paper

Computational fluid dynamics (CFD) based erosion prediction model in elbows

Halima Hadžiahmetović orcid.org/0000-0003-1090-1438 ; University of Sarajevo, Faculty of Mechanical Engineering Sarajevo, Department for Power Engineering and Processing Techniques, Vilsonovo šetalište 9, 71 000 Sarajevo, Bosnia & Herzegovina
Nedim Hodžić ; University of Zenica, Faculty of Mechanical Engineering Zenica, Department for Power Engineering and Processing Techniques, Fakultetska 1, 72 000 Zenica, Bosnia & Herzegovina
Damir Kahrimanović ; University of Sarajevo, Faculty of Mechanical Engineering Sarajevo, Department for Power Engineering and Processing Techniques, Vilsonovo šetalište 9, 71 000 Sarajevo, Bosnia & Herzegovina
Ejub Džaferović ; University of Sarajevo, Faculty of Mechanical Engineering Sarajevo, Department for Power Engineering and Processing Techniques, Vilsonovo šetalište 9, 71 000 Sarajevo, Bosnia & Herzegovina

Abstract

In this paper solid particles erosion prediction in an elbow geometry is made by means of numerical simulation. The corresponding, three-dimensional numerical simulations are carried out with the Ansys Fluent software package. The continuous phase is simulated with the Reynolds Stress Model (RSM), which belongs to the group of Reynolds Averaged Navier Stokes (RANS) models. Discrete particle paths are traced in Lagrangian reference frame. Additional sub-models are implemented into the software in order to properly resolve the particle movement through the wall-bounded geometry. These sub-models include particle-wall collisions and erosion. Proper resolving of particle-wall collisions is crucial for pneumatic transport simulations, as it makes the strongest influence on the particle history, concentration and velocity components prior to the place of interest (elbow erosion in this case). The removal of wall material due to erosion (erosion rate) is calculated using the Finnie’s model of erosion developed for ductile materials. Simulation results were validated with the published experimental data from [1].

Keywords

CFD-modelling; Eulerian-Lagrangian Discrete Phase Model; pneumatic conveying; solid particle erosion

Hrčak ID:

120378

URI

https://hrcak.srce.hr/120378

Publication date:

26.4.2014.

Article data in other languages: croatian

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