PhD

Assistant Professor

Email
a.ozel@hw.ac.uk
Research

Dr. Ozel’s research experiences and collaborations have allowed him to work with various international academic, industrial, and governmental institutions. Through these projects, he has developed expertise in a wide range of disciplines within fluid mechanics from single phase turbulent flows to environmental fluid dynamics, and reactive flows to multi-scale modeling of fluid-particle flows.

His current research field is fluid-particle flows. He has been using the multi-scale modeling approach to develop theoretical and numerical models for fluid-particle flows. He has pursued three levels of modeling: Particle Resolved Direct Numerical Simulation at micro-scale, Euler-Lagrange approach at meso-scale, and Euler-Euler (two-fluid) two-phase modeling at macro-scale. At each scale, he has sought to systematically post-process simulation results to formulate coarse constitutive models for filtered two-fluid model and coarse-grained Euler-Lagrange approaches to simulation of industrial scale devices. His recent focus has been on particle assemblies manifesting cohesion through van der Waals and liquid bridge capillary forces and triboelectric charging.

Dr. Ozel has also been working on the development and deployment of state-of-the-art computational modeling and simulation tools to accelerate the commercialization of solvent-based carbon capture technologies. Specifically, he carries out finely resolved Volume of Fluid model simulations to predict the solvent/gas/structure interactions for different solvent and gas properties in various geometrical structures relevant to industry, ranging from inclined planes to spherical packed beds. The results are then used for subsequent development of coarse constitutive models for upscaling to device scale simulations.

In addition, he is interested in non-linear phenomena such as shear thickening or thinning, non-uniform shear profiles (shear banding) and wall slip in the rheology of dense granular suspensions. He uses discrete element method to extract macroscopic information such as particle stresses to formulate microstructure based rheological models. These models would be used for some pharmaceutical industrial applications, such as fluidized bed granulations, pharmaceutical tablet coating and drying mixers.

His ultimate research aim is to enable next-generation flow systems, which can offer real world solutions to global challenges of the 21st century ranging from the innovation in mechanical, process, and energy engineering to the development of carbon capture technologies.

Selected publications

1.     Ozel A., de Motta J. C. B., Abbas M., Fede P., Masbernat O., Vincent,  Estivalezes S. J.-L., Simonin O. (2017). Particle Resolved Direct Numerical Simulation of a Liquid-Solid Fluidized Bed: Comparison with Experimental Data, Int. J. Multiphase Flow, 89;228–240.

 

2.     Boyce C. M., Rice N. P., Ozel A., Davidson J. F., Sederman A. J., Gladden L.F., Sundaresan S., Dennis J. S., Holland D. J. (2016). A Magnetic Resonance Study of Gas and Particle Dynamics in a Bubbling Fluidized Bed, Phys. Rev. Fluids, 1(7), 07420.

 

3.     Ozel A, Kolehmainen J., Radl S., Sundaresan S. (2016). Fluid and Particle Coarsening of Drag Force for Discrete-Parcel Approach, Chem. Eng. Sci., 155: 258–267.

 

4.     Gu, Y., Ozel A, Sundaresan S. (2016). A Modified Cohesion Model for CFD-DEM Simulations of Fluidization, Powder Tech., 296:17-18.

 

5.     J. Kolehmainen, A. Ozel, C. M. Boyce, S. Sundaresan (2016). A Hybrid Approach to Computing Electric Forces in Fluidized Beds of Charged Particles, AIChE J., 62(7): 2282–2295 (rated as at "Top Tier" contribution).

 

6.     Ozel A., Fede P., Simonin O. (2013). Development of Filtered Euler-Euler Two-phase Model for Circulating Fluidized Bed: High Resolution Simulation, Formulation and a Priori Analyses, Int. J. Multiphase Flow, 55:43-63.

For a complete list of Dr. Ozel's publications, please visit his PURE page.

Biography

Dr. Ozel has B. Sc. and M. Sc. degrees in Aerospace and Aeronautical Engineering from Istanbul Technical University, Turkey and Research Master in Environmental and Applied Fluid Dynamics from von Karman Institute for Fluid Dynamics, Belgium. He earned his Ph.D. in Fluid Dynamics from Institut de Mécanique des Fluides de Toulouse (Institute of Fluid Mechanics of Toulouse), France. He did a year of post-doctoral research and worked as an associate research scholar for three years at Princeton University, USA.