PDFs & Tech Graduates Undergraduates Past Students
Hirad Soltani
hsoltani@ualberta.ca
Graduate
M.Sc.
RGL
Research Interests: PIV, Multi-Phase Flow, Rising bubble, Rising Oil Droplet, Creeping Flow, Matching Refractive Index (MRI)
For more than two years, I have been developing particle shadow velocimetry (PSV) measurement techniques to study multiphase flows in creeping flow regime. The main idea of optical measurement techniques, such as particle image velocimetry (PIV) and PSV, is to take sequential images from a fluid flow, in which tracer particles are mixed. Based on the displacement of particles in between images, the velocity vector field could be determined.
My M.Sc. project is about developing quantitative information of single air bubbles and oil droplets rising in a net co-flow passing through a mini-slot. I have used commercial image processing softwares (Davis 8.3.0, LaVision GmbH), or developed in-hous image acquisition codes.In the rising bubble experiment, we derived air bubble rising velocity and diameter, and flow around the bubbles .
The second part of my experimental study is matching refractive index for heavy oil droplets rising in a co-current flow passing through a mini-slot. I have investigated the internal counter rotating vortices inside the single oil droplets for diffrent droplet sizes and different bulk flow rates. Different processing approaches were used for this experiment, and results were compared together.
Image of the developed experimental setup
Single air bubble rising in a co-flow through a mini-slot
Heavy oil droplet rising in a viscous fluid with co-current flow through a mini-slot. The refractive index of both phases is matched
Publications
Soltani, H. Rasimarzabadi, F. Leitch, M. Nobes, D.S. (2017), "Effect of Bubble Size Passing Through a Rectangular Orifice Using Particle Shadow Velocimetry (PSV)", 2nd Thermal and Fluids Engineering (TFEC) Conference, Las Vegas, USA
Soltani, H. Hadfield, J. Nobes, D.S. (2017), "Developing Quantitative Information From Shadowgraph Images of Air Bubbles Passing Through a Mini-Slot", Second International Symposium on Image based Metrology (ISIMet), Hawaii, USA (submitted)
Hadfield, J. Soltani, H. Nobes, D.S. (2017), "Applications of Plenoptic PTV: A Single-Camera Time-Resolved Three-Dimensional Fluid Flow Measurement Technique", Second International Symposium on Image based Metrology (ISIMet), Hawaii, USA (submitted)
Soltani, H. Nobes, D.S. (2017), "Shadowgraph Imaging to Quantify Air Bubble Rising Velocity as Passing Through a Rectangular Flow Cell with a Mini-Slot", Okanagan Fluid Dynamics Meeting, Kelowna, British Columbia, Canada (submitted)
Soltani, H. Hadfield, J. Redmond, M. Nobes, D.S. (2017), "Observation of the Flow Behavior for a Rising Droplet in a Mini-Slot" 19th International Conference on Fluid Mechanics, Heat Transfer and Thermodynamics (ICFMHTT), Venice, Italy