PDFs & Tech Graduates Undergraduates Past Students
Reza Azadi
razadi@ualberta.ca
PhD
M.Sc. in Mechanical Engineering (2015)
B.Sc. in Mechanical Engineering (2012)
RGL Project
Research Interests: Optical techniques, Multi-phase flow, Turbulence, Flashing, Cavitation
I finished my Master of Science in mechanical engineering in 2015 as the first stand student at Tarbiat Modares University, Tehran, Iran. As the first phase of my research, I studied two-phase flow patterns in small to large scale vertical tubes. To this aim, a large-scale vertical two-phase flow test system was designed and constructed at the Multiphase Flow Lab in Tarbiat Modares University. The system was nominated to compete in the 17th Khwarizmi International Award (KIA), Iran. I developed code scripts in MATLAB coupled with artificial neural network (ANN), digital image processing (DIP) and principal component analysis (PCA) to recognize the flow patterns intelligently. In the second phase of my research, I developed a new two-dimensional CFD code to capture the interface of laminar two-phase flows using a model called VOSET which couples volume of fluid (VOF) and level-set (LS) methods. The code is capable of capturing sharp interfaces and is mass-conserved. The outcome of my M.Sc. research was publication of seven ISI, national and conference papers.
Continuing my cooperation as a research assistant in Multiphase Flow team in Tarbiat Modares University, I was linked in several industrial projects during which I used OpenFoam and Ansys Fluent to simulate the dynamics of two-phase flows. Two-equation turbulence, VOF, six-DOF and dynamic mesh models were coupled to capture the fluid-solid interactions of a high-speed hull moving in a two-phase flow. I coupled stress blended eddy simulation (SBES) turbulence model with oblique shock-wave solvers to resolve the turbulence structures in a jet air intake.
I worked in construction and building industry for two consecutive years after my graduation. Designing building piping systems, filtration systems for swimming pools and project management were some of my main tasks.
I decided to continue my studies by joining the Optical Diagnostic Group in 2017 as a Ph.D. student. During the first year of my PhD, I more strengthened my knowledge in fluid dynamics by passing courses such as continuum mechanics, advanced surface engineering, optical methods in fluid mechanics, computational methods in porous media and fluid-particle systems. I gained a valuable experience on exploiting optical techniques to study the complex flow fields. Implementing particle image/tracking velocimetry (PIV/PTV) in two/three-dimensions, I am trying to elucidate the intricacies of turbulent two-phase flows with one phase cavitating/flashing due to huge pressure drops. Chaotic cavitating flows are present in vital applications ranging from microscale cancer-killing mechanisms to ultrasonic cavitation or nozzle flow in petroleum industry.
Award and Honors:
- 2018 Invited to the University of Alberta’s chapter of the Golden Key International Honor Society
- 2017 Presidential doctoral scholarship (PDS), University of Manchester, England (declined)
- 2017 Straight PhD scholarship, Sharif University, Tehran, Iran (declined)
- 2017 Outstanding master student Award, Tarbiat Modares University, Tehran, Iran
- 2016 Awarded the membership of national elites foundation, Iran
- 2016 Exempted from Ph.D. entrance exam as an “Exceptionally Talented” student, Iran
- 2015 Awarded the membership of elites talent organization, Tarbiat Modares University, Tehran, Iran
- 2015 Highest GPA student award in department of mechanical engineering, Tarbiat Modares University, Tehran, Iran
- 2012 Among 1% of participants who passed Iranian national University M.Sc. entrance exam
- 2008 Among 0.5% of participants who passed Iranian national university entrance exam
3D reconstruction of bubble volume using an analytical-experimental methodology
Particle image velocimtery (PIV) analysis of dynamics of spherical bubbles in a viscous liquid flow
Internal vortices of a large bubble moving in a viscous fluid through a confined geometry, captured by VOSET model
Publications
Journal Papers
• M. R. Ansari and R. Azadi, “Effect of diameter and axial location on upward gas-liquid two-phase flow patterns in intermediate-scale vertical tubes”, Ann. Nucl. Energy, vol. 94, pp. 530–540, Aug. 2016.
• M. R. Ansari, R. Azadi, and E. Salimi, “Capturing of interface topological changes in two-phase gas–liquid flows using a coupled volume-of-fluid and level-set method (VOSET)”, Comput. Fluids, vol. 125, pp. 82–100, Feb. 2016.
• M. R. Ansari, R. Azadi and S. Kiani Haghgu, “Experimental Investigation on Gas-Liquid Two-Phase Flow Regimes in Upward Co-Current Vertical Tubes with Intermediate Diameter”, Modares Mechanical Engineering, Vol. 15, No. 6, pp. 383-392, 2015. (In Persian)
• M. R. Ansari, R. Azadi and S. Kiani Haghgu, “Experimental Study of Hydrodynamics of Slug Flow Pattern in Vertical Upward Pipes”, Modares Mechanical Engineering, Vol. 15, No. 7, pp. 239-247, 2015. (In Persian)
• M. R. Ansari, H. Ghoushchi and R. Azadi, “Numerical simulation of a model high speed hull with two-degrees of freedom”, Modares Mechanical Engineering, Vol. 17, No. 2, pp. 231-239, 2017. (In Persian)
Conference presentations
• R. Azadi and D. S. Nobes, “On the detachment mechanisms of monodisperse bubbles flowing through a wavy channel”, 13th International Symposium on Particle Image Velocimetry (ISPIV), Munich, Germany, 2019.
• R. Azadi, H. Soltani, R. Sabbagh and D. S. Nobes, “Experimental and numerical investigation of bubble dynamics rising through a rectangular confinement”, 5th International Conference on Experimental Fluid Mechanics (ICEFM), Munich, Germany, 2018.
• H. Soltani, R. Azadi, A. Baldygin, S. Ansari and D. S. Nobes, “Developing quantitative information of oil droplets rising through a rectangular confinement”, 5th International Conference on Experimental Fluid Mechanics (ICEFM), Munich, Germany, 2018.
• R. Azadi and M. R. Ansari, “Tracking interface topological changes in two-phase flows using new coupled volume-of-fluid and level-set method (VOSET)”, International conference on economics, accounting, management and social sciences & International conference on engineering, arts, management and environment, Szczecin, Poland, 2014.
• M. R. Ansari and R. Azadi, “Numerical simulation of bubble rise regimes in liquid column using New VOSET algorithm”, International Conference on Heat and Mass Transfer, Semnan, Iran, 2014. (In Persian)
• M. R. Ansari, R. Azadi, “Numerical study of bubble free rise in a viscous fluid using the new VOSET method”, 1st national conference of applied mechanics, Tabriz, Iran, 2014. (In Persian)