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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
- 2Particle Image Velocimetry
- 2Particle Tracking Velocimetry
- 2Particle image velocimetry
- 2Superhydrophobic
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Fall 2023
It is well known that long-chain polymers and surfactants can significantly reduce the skin-friction drag of turbulent liquid flows; a phenomenon often referred to as rheological drag reduction. However, it is unclear if the mechanism for drag reduction is common among different types of polymers...
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Spring 2023
The fluid mechanics literature suggests that the ability to manipulate the very-large-scale motions (VLSMs) that exist within turbulent boundary layers (TBLs) would provide influence over the unwanted drag forces, noise, and vibrations associated with these flows. The ability to suppress these...
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Fall 2018
The work within this thesis is concerned with an unsteady flow phenomenon known as vortex shedding. It is ubiquitous throughout engineering applications and leads to unwanted noise, vibration, and pressure drop in the afflicted systems. Vortex shedding is highly complex, and even with over a...
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Fall 2021
The near wake behind the Ahmed body at zero-yaw has been extensively studied in the past, but comparatively little is known about the changes in the wake flow patterns during crossflow. Measurements of the near wake of a square-back Ahmed body were obtained at a Reynolds Number of ReH = 9.2104...
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Experimental Investigation of Heat Transfer and Pressure Drop of Pipes with Internal Roughness
DownloadFall 2022
In many industrial heat exchangers, it is desirable to improve the rate of heat transfer from a pipe wall to the fluid flow. This improvement is commonly made by adding some form of roughness to the pipe surface. However, the added roughness often leads to an increase in the pressure drop of the...
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Fall 2020
The transportation of mixtures of particles and liquids using slurry pipelines plays a crucial role in the petroleum and mining industries. Slurry pipeline flows are typically turbulent and the presence of the particulate phase results in pipe wear and increased pumping cost. As a result, slurry...
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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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Fall 2018
Helicopters have proven to be a versatile air vehicle in today’s society and are used in a variety of applications. Many complexities arise in the aerodynamics of helicopters due to the presence of the main rotor downwash and the diverse range of flight conditions. The various uses of helicopters...
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Fall 2023
To enhance the aerodynamic performance of a vehicle, a fundamental understanding of the flow is required. This can be achieved through flow characterization of simplified models such as the Ahmed body. However, uncertainties regarding the topology of flow motions in the wake persist due to 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...