Degree

Doctor of Philosophy (PhD)

Department

Cain Department of Chemical Engineering

Document Type

Dissertation

Abstract

Particle-laden flows are investigated numerically from a meso-scale perspective using Computational Fluid Dynamics coupled with Discrete Element Method (CFD-DEM) and from a micro-scale perspective using Particle Resolved Direct Numerical Simulation (PR-DNS). For the former, the dynamics of a pseudo-2D pulsed fluidized bed (PFB) consisting of 400,000 to 800,000 particles was investigated (Chapters 2 and 3). The focus is on the capabilities of CFD-DEM to (1) reproduce pattern formation in these systems and (2) further the understanding of the dynamics of PFB's as a function of pulsation parameters. In Chapter 4, a two-spheres system is investigated with a recently implemented PR-DNS code, using the Basilisk open source framework. A high-resolution study is performed to investigate the flow field structures and their relation to experienced hydrodynamic forces by the spheres under the influence of a wall. In Appendix A, some verification and validation cases are reported with both the aforementioned codes, presenting capabilities that can be further explored in future work.

Date

1-9-2020

Committee Chair

Nandakumar, Krishnaswamy

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