Thesis
Particle-wall interactions in turbulence flow to predict erosion in pipelines and devices
- Creator
- Rights statement
- Awarding institution
- University of Strathclyde
- Date of award
- 2022
- Thesis identifier
- T16408
- Person Identifier (Local)
- 201854073
- Qualification Level
- Qualification Name
- Department, School or Faculty
- Abstract
- The aim of this study is the development and validation of computational fluid dynamics models (CFD) for two-phase dispersed flow when applied to erosion of surfaces due to particle impact. The main objectives were to understand the particle forces, understand the influence of the particle size and material on the erosion mechanism, develop and integrate the modified Finnie erosion model and perform numerical studies on channel cavities to predict material removal from the impacted surface. An Euler-Lagrangian methodology is used and adapted to accommodate a larger number of particles. It uses time-averaged mass and momentum conservation equations to describe the time-dependent motion of fluid and particles. These equations are discretised by the Finite Volume Method (FVM) and are solved by the PIMPLE algorithm. The turbulence of the continuous phase is described utilising the k-ωSST turbulence model which incorporates turbulence terms to account for the effects of both phases. The investigation of the particle-wall and particle-particle effects in particle-laden turbulence flows is also carried out. This is achieved by a Lagrangian approach where the motion of the particles is tracked. Initially, the simulated particle-laden flow is validated in channel geometry. Finally, the erosion mechanisms are reviewed and an erosion model is developed and incorporated in the CFD-DEM coupled simulation solver. The developed model is applied to a turbulent flow within a channel incorporating a cavity. The simulated results are validated using literature established experimental and computational results for both cases. The CFD analysis on this study has been implemented in OpenFOAM (OF) software in which the erosion modelling has been coded. The study shows that the DPM solver provides good results for the particle motion on a viscous fluid flow. Moreover, the solver produced similar results for the turbulence laden flows in a channel. The integrated erosion model has been tested on a channel flow and the erosion rate is comparable to the numerical data found in the literature. The applied model on the annular cavity shows good agreement in the aggregate values on the material removal rates due to the particle impact compared to the experimental data.
- Advisor / supervisor
- Dempster, William
- Resource Type
- DOI
Las relaciones
Elementos
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PDF of thesis T16408 | 2022-11-03 | Público | Descargar |