Doctoral Dissertations


Omar Farid

Keywords and Phrases

Fluid mechanics


"Bubble/slurry bubble columns have been widely studied and employed as multiphase flow reactors with and without vertical heat-exchanging tubes. In order to understand more deeply the effect of the dense internals on the hydrodynamics of bubble/slurry bubble column, systematic experiments were performed to visualize and quantify using the radioactive particle tracking (RPT) technique. A new methodology for implementing the radioactive particle tracking (RPT) technique has been developed to investigate the effect of the dense internals on the hydrodynamics of the bubble/slurry column reactor. Monte Carlo N-Particle (MCNP) simulation has been implemented to simulate the system to generate a large number of calibration points to reconstruct the instantaneous positions of the radioactive particle using the similarity algorithm. The reliable data can help evaluate and validate the computational fluid dynamics (CFD) models to predict the hydrodynamic parameters involved in bubble/slurry bubble column reactors. Moreover, a new hybrid measurement technique was developed and employed to study line-averaged three-phase holdup distribution in a Slurry Bubble Column Reactor (SBCR) using gamma-ray densitometry (GRD) and point optical fiber probe (OFP) techniques. The obtained results indicated that increasing the solids loading increased the solid holdup and decreased the liquid holdup.

However, the gamma-ray computed tomography (γ-CT) technique has been employed to investigate the aggregate distribution/dispersion in self-consolidating concrete (SCC) as advanced sustainable construction materials and to evaluate the gamma-ray shielding properties of concrete in nuclear applications."--Abstract, page iv.


Al-Dahhan, Muthanna H.

Committee Member(s)

Liang, Xinhua
Okoronkwo, Monday Uchenna
Rezaei, Fateme
Khayat, Kamal


Chemical and Biochemical Engineering

Degree Name

Ph. D. in Chemical Engineering


Missouri University of Science and Technology

Publication Date

Summer 2022

Journal article titles appearing in thesis/dissertation

  • New benchmarking hydrodynamics data using newly developed methodology for implements radioactive particle tracking (RPT) technique in bubble column with intense internals.
  • New benchmarking hydrodynamics data of solids in a slurry bubble column with and without internals for ft synthesis using the newly developed method for implementing radioactive particle tracking (RPT) technique.
  • New dual modality technique of gamma-ray densitometry (GRD) and optical fiber probe (OFP) to investigate line-averaged diameter profiles of gas, liquid, and solid holdups along the height of a slurry bubble column.
  • Feasibility study of implementing gamma-ray computed tomography on measuring aggregate distribution and radiation shielding properties of concrete samples.


xviii, 193 pages

Note about bibliography

Includes bibliographic references.


© 2022 Omar Farid, All rights reserved.

Document Type

Dissertation - Open Access

File Type




Thesis Number

T 12157

Electronic OCLC #