The investigation of fluids containing particles or filaments includes a category of complex fluids and is vital in both theory and application. The forecast of particle behaviours plays a significant role in the existing technology as well as future technology.
The present work focuses on the prediction of the particle behaviour through the investigation of the particle disentrainment from a pipe on a horizontal air stream. This allows for examining the influence of the particle physical properties on its behaviour when falling on horizontal air stream. This investigation was conducted on a device located at the University of Greenwich's Medway Campus. Two materials were selected to carry out this study: Salt and Glass Beads Nano particles. The shape of the Slat particles is cubic where the shape of the Glass Beads is almost spherical. The outcome from the experimental work were presented in terms of distance travelled by the particles according to their diameters as After that, the particles sizes were measured using Laser diffraction device and used to determine the drag coefficient and the settling velocity.
For a verification and more deep insight, the experimental setup was modelled using Computational Fluid Dynamics (CFD) technique and the results were compared with the experimental results in terms of distance travelled. A good agreement was observed between the CFD and experimental results. The experimental and numerical results showed that the size of the particle has a huge impact on the drag coefficient and the settling velocity. Larger diameters lead to less drag and hence higher settling velocity. Also, the lighter particles tent to travel horizontally further than the heavier ones.
Inhaltsverzeichnis (Table of Contents)
- Introduction
- Problem Statement
- Aim and objectives
- Literature Review
- Introduction
- Fluid-solid mixture
- Calculation methods of spherical particles settling velocity
- Test apparatus
- Chamber
- Air delivering
- Laser diffraction
- Experimental methodology
- Preparation
- Safety
- Setup
- Martials
- Salt
- Glass beads
- Air properties
- Experiment
- Assumption
- Testing
- Preparation
- Result & Discussion
- Experimental results
- Salt results
- Glass beads results
- Hand calculation results
- CFD modelling
- Methodology
- CFD modelling results
- Experimental results
- Conclusion
- Future work& Recommendations
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
This project aims to evaluate particle settling behavior in a flow chamber by investigating the disentrainment of particles from a pipe onto a horizontal air stream. The research examines the influence of particle properties on their settling velocity and the impact of particle size on drag coefficient.
- Particle settling behavior in a flow chamber
- Influence of particle physical properties on settling velocity
- Impact of particle size on drag coefficient
- Comparison of experimental and computational fluid dynamics (CFD) results
- Application of the findings in existing and future technologies
Zusammenfassung der Kapitel (Chapter Summaries)
The introduction provides an overview of the project, highlighting the significance of particle settling in both theoretical and practical contexts. The literature review delves into the fundamentals of fluid-solid mixtures and established methods for calculating settling velocity of spherical particles. The test apparatus chapter describes the experimental setup, including the flow chamber, air delivery system, and laser diffraction device.
The experimental methodology chapter outlines the safety protocols, preparation steps, and detailed experimental procedures for testing the settling of salt and glass beads. The result and discussion section presents the outcomes from both experimental and computational fluid dynamics simulations, analyzing the impact of particle size and properties on settling velocity and drag coefficient. The conclusion summarizes the findings and suggests potential avenues for future research.
Schlüsselwörter (Keywords)
The key words and focus topics of this project include particle settling, flow chamber, drag coefficient, settling velocity, computational fluid dynamics (CFD), experimental methodology, fluid-solid mixture, particle properties, and salt and glass beads.
- Quote paper
- Abdulrahman Alenezi (Author), 2019, Evaluation of particle settling in flow chamber, Munich, GRIN Verlag, https://www.grin.com/document/537441
