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Skip to Search Results- 1Ahmadi Jokani, Farzad
- 1Booysen, Adriaan
- 1Chen, Chin Wang
- 1Elyasi, Mohammad Mahdi
- 1Fathizadeh, Ali
- 1Gibeau, Bradley
- 2Aerodynamics
- 2Drag Reduction
- 2Friction factor
- 2Particle Image Velocimetry
- 2Particle Tracking Velocimetry
- 2Particle image velocimetry
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Spring 2020
A reduction in skin-friction drag can lead to lower energy consumption in variety of transportation vehicles, and consequently results in a smaller environmental impact. Several methods have been presented to reduce the skin-fiction and one of these methods is to introduce an air layer at the...
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Investigating the Performance of Randomly Patterned Superhydrophobic Surfaces in Laminar and Turbulent Channel Flows
DownloadSpring 2019
Superhydrophobic surfaces (SHSs) have been investigated based on their success in water repellency, anti-fouling, and drag reducing effects seen in nature (Neinhuis & Bartlott 1997; Kreuz et al. 2001). SHSs utilize a low surface energy material with a microscale surface roughness to prevent water...
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Investigation Using Polymer Additives to Mitigate Erosion in Multiphase Turbulent Pipe Flow
DownloadSpring 2019
Long chained polymers were evaluated for their impact on reducing pipe erosion during two-phase flow. The research study was compartmentalized into three categories. One of the components of this study investigated the erosion of different materials in an attempt to find a faster eroding...
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Particle image velocimetry/ tracking in turbulent flow over riblet surfaces with superhydrophobic coating
DownloadFall 2016
Riblet surfaces have been introduced as of one successful technique to reduce skin-friction. Advanced particle image velocimetry (PIV) and particle tracking velocimetry (PTV) are employed to investigate turbulent structures over riblet surfaces by several researchers including Suzuki and Kasagi...
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Spring 2024
Predicting polymer drag reduction from polymer solution rheology can be potentially achieved by developing a model between friction factor and rheological characteristics. The model’s foundation depends on establishing a correlation between these parameters, and its robustness depends on the size...
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Reactive control of velocity fluctuations using an active deformable surface and real-time PIV
DownloadFall 2023
This work investigated the use of an active deformable surface and real-time particle image velocimetry (RT-PIV) for reactive control of periodic vortex shedding from a wall-mounted spherical cap immersed in a laminar boundary layer. The reactive control strategies involved locally targeting...
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Fall 2018
Vortex generators (VGs) are widely applied passive flow control devices that are proven to have significant effect in enhancing the performance of an aerodynamic system. With the recent development in non-intrusive measurement techniques, and computing ability, it has become possible to measure...
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Transition From Laminar to Turbulent Flow in Non-Newtonian Channel Flows: The Impact of Drag Reducing Polymer Additives
DownloadFall 2023
This thesis investigates the effect of a drag-reducing polymer on laminar-turbulent transition in a gravity-driven channel flow. The drag-reducing polymer is polyacrylamide (PAM) dissolved in water at concentrations of 50, 75, 100, and 150 parts per million (ppm). An extensive experimental...
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Unsteady characteristics of three-dimensional turbulent flow with separation in an asymmetric diffuser
DownloadFall 2017
A great number of studies have been undertaken to understand separated turbulent boundary layers (TBLs) due to its importance in the performance, design and control of many engineering systems (Hal 2000). Flow separation has a complicated three-dimensional nature in many flow configurations...